FLUID PUMPING DEVICE FOR USE WITH A FLUID PUMP

ORGANE ACTIF POUR POMPE DE FLUIDE

English Abstract

ABSTRACT OF THE DISCLOSURE
A fluid pumping arrangement including a
fluid pump including a suction port, and a fluid
pumping device comprising a pump housing defining a
recess, and a moveable wall which is located in the
recess and which cooperates with the recess to define
a variable volume pumping chamber. The pumping
device also includes a fluid inlet communicable with
the fluid pumping chamber and adapted to communicate
with a source of fluid, a fluid outlet communicable
with the fluid pumping chamber and communicating with
the suction port, and an arrangement for effecting
reciprocating movement of the moveable wall in
response to alternate communication of the fluid
pumping chamber with the fluid outlet and with the
fluid inlet.

Claims

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CLAIMS
1. A fluid pumping arrangement
including a fluid pump including a suction port, and
a fluid pumping device comprising a pump housing
defining a recess, a moveable wall which is located
in said recess and which cooperates with said recess
to define a variable volume pumping chamber, biasing
means for moving said moveable wall in one direction,
a fluid outlet communicable with said fluid pumping
chamber and communicating with said suction port so
that suction present at said suction port
communicates with said fluid pumping chamber and
thereby moves said moveable wall in the opposite
direction against the action of said biasing means
when said fluid pumping chamber is in communication
with said fluid outlet, a fluid inlet communicable
with said fluid pumping chamber and adapted to
communicate with a source of fluid, and means for
selectively controlling communication of said fluid
pumping chamber with said fluid outlet and with said
fluid inlet.
2. A fluid pumping arrangement in
accordance with Claim 1 wherein said fluid pumping
device further includes means responsive to movement
of said moveable wall for pumping a second fluid.

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3. A fluid pumping arrangement in
accordance with Claim 2 wherein said means for
pumping a second fluid comprises a bore which is in
said pump housing and which extends perpendicularly
from said moveable wall and which partially defines a
second variable volume fluid pumping chamber, a
piston which is received in said bore and which
includes a first end and a second end, said first end
being attached to said moveable wall and said second
end cooperating with said bore to form said second
variable volume fluid pumping chamber, a second fluid
inlet in communication with said second fluid pumping
chamber and adapted to communicate with said second
fluid pumping chamber and adapted to communicate with
a second source of fluid, check valve means in said
second fluid inlet for permitting fluid flow into and
preventing fluid flow from said second fluid pumping
chamber, a second fluid outlet in communication with
said second fluid pumping chamber and adapted to
communicate with said suction port, and check valve
means in said second fluid outlet for permitting
fluid flow from and preventing fluid flow into said
second fluid pumping chamber.

4. A fluid pumping arrangement in
accordance with Claim 1 wherein said selective
controlling means comprises a valve housing defining
a valve chamber, a first suction passageway extending
between said fluid outlet and said valve chamber, a
first fluid passageway extending from said valve
chamber to said fluid inlet, a second suction
passageway extending from said valve chamber to said
fluid pumping chamber, a second fluid passageway
extending from said fluid pumping chamber to said
valve chamber, a shuttle valve in said valve chamber
and moveable between a first position wherein said
first suction passageway is in communication with
said second suction passageway and said first fluid
passageway is not in communication with said second
fluid passageway, and a second position wherein said
first fluid passageway is in communication with said
second fluid passageway and said first suction
passageway is not in communication with said second
suction passageway, and means connecting said shuttle
valve to said moveable wall and providing for lost
motion between said shuttle valve and said moveable
wall.
5. A fluid pumping arrangement in
accordance with Claim 4 wherein said valve chamber
includes a first end and a second end, and wherein
said first and second suction passageways are in
communication with said first end of said valve
chamber, and wherein said first and second fluid
passageways are in communication with said second end
of said valve chamber.
18

6. A fluid pumping arrangement in
accordance with Claim 4 wherein said selective
controlling means further includes detent means for
alternately biasing said shuttle valve towards said
first position and said second position.
7. A fluid pumping arrangement in
accordance with Claim 1 wherein said biasing means
for moving said moveable wall in one direction
comprising a spring in said fluid pumping chamber and
extending between said moveable wall and said pump
housing.
8. A fluid pumping arrangement in
accordance with Claim 1 and further including means
for continuing the flow of fluid to said suction port
when said fluid outlet is not in communication with
said fluid pumping chamber.
19

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9. A marine propulsion device in
accordance with Claim 8 wherein said supply
continuation means comprises a housing defining a
supply recess, a supply movable wall which is located
in said supply recess and which cooperates with said
supply recess to define a variable volume supply
chamber, a fluid port communicating with said supply
chamber, said fluid outlet, and said suction port so
that suction present at said suction port moves said
supply moveable wall in one direction and so that
said supply chamber supplies fluid to said suction
port when said fluid outlet is not in communication
with said fluid pumping chamber, and means for
biasing said supply moveable wall in the opposite
direction to fill said supply chamber with fluid when
said fluid outlet is in communication with said fluid
pumping chamber.

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10. A fluid pumping arrangement
including a fluid pump including a suction port, and
a fluid pumping device comprising a pump housing
defining a recess, a moveable wall which is located
in said recess and which cooperates with said recess
to define a variable volume pumping chamber, a fluid
inlet communicable with said fluid pumping chamber
and adapted to communicate with a source of fluid, a
fluid outlet communicable with said fluid pumping
chamber and communicating with said suction port, and
means for effecting reciprocating movement of said
moveable wall in response to alternate communication
of said fluid pumping chamber with said fluid outlet
and with said fluid inlet, whereby, when said fluid
pumping chamber is in communication with said fluid
outlet, said moveable wall is displaced in one
direction to fill said pumping chamber with fluid,
and whereby, when said fluid pumping chamber is in
communication with said fluid outlet, said moveable
wall is displaced in said opposite direction to empty
fluid from said pumping chamber.
11. A fluid pumping arrangement in
accordance with Claim 10 wherein said fluid pumping
device further includes means responsive to movement
of said moveable wall for pumping a second fluid.

-22-
12. A fluid pumping arrangement in
accordance with Claim 11 wherein said means for
pumping a second fluid comprises a bore which is in
said pump housing and which extends perpendicularly
from said movable wall and which partially defines a
second variable volume fluid pumping chamber, a
piston which is received in said bore and which
includes a first end and a second end, said first end
being attached to said movable wall and said second
end cooperating with said bore to form said second
variable volume fluid pumping chamber, a second fluid
inlet in communication with said second fluid pumping
chamber and adapted to communicate with a second
source of fluid, check calve means in said second
fluid inlet for permitting fluid flow into and
preventing fluid flow from said second fluid pumping
chamber, a second fluid outlet in communication with
said second fluid pumping chamber and adapted to
communicate with said suction port, and check valve
means in said second fluid outlet for permitting
fluid flow from and preventing fluid flow into said
second fluid pumping chamber.
13. A fluid pumping arrangement in
accordance with Claim 10 wherein said reciprocative
moving means comprises biasing means for moving said
moveable wall in said one direction, and means for
selectively controlling communication of said fluid
pumping chamber with said fluid outlet and with said
fluid inlet.

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14. A fluid pumping arrangement in
accordance with Claim 10 and further including means
for continuing the supply of fluid to said suction
port when said fluid outlet is not in communication
with said fluid pumping chamber.
15. A fluid pumping arrangement in
accordance with Claim 14 wherein said supply
continuation means comprises a housing defining a
supply recess, a supply moveable wall which is
located in said supply recess and which cooperates
with said supply recess to define a variable volume
supply chamber, a fluid port communicating with said
supply chamber, said fluid outlet and said suction
port so that suction present at said suction port
moves said supply moveable wall in one direction so
that said supply chamber supplies fluid to said
suction port when said fluid outlet is not in
communication with said fluid pumping chamber, and
means for biasing said supply moveable wall in the
opposite direction to fill said supply chamber with
fluid when said fluid outlet is in communication with
said fluid pumping chamber.

16. A fluid pumping device comprising
a pump housing defining a recess, a movable wall
which is in said recess and which cooperates with
said recess to define a variable volume fluid
metering chamber, biasing means for moving said
movable wall in one direction, a fluid outlet
communicable with said fluid metering chamber and
adapted to communicate with a suction port of a fluid
pump so that suction present at the suction port
communicates with said fluid metering chamber and
thereby moves said movable wall in the opposite
direction against the action of said biasing means
when said fluid metering chamber is in communication
with said fluid outlet, a fluid inlet communicable
with said fluid metering chamber and adapted to
communicate with a source of fluid, means for
selectively controlling communication of said fluid
metering chamber with said fluid outlet and said
fluid inlet, a bore which is in said pump housing and
which extends perpendicularly from said movable wall
and which partially defines a variable volume fluid
pumping chamber, a piston which is received in said
bore and which includes a first end and a second end,
said first end being attached to said movable wall
and said second end cooperating with said bore to
form said variable volume fluid pumping chamber, a
second fluid inlet in communication with said fluid
pumping chamber and adapted to communicate with a
second source of fluid, check valve means in said
second fluid inlet for permitting fluid flow into and
preventing fluid flow from said fluid pumping
chamber, a second fluid outlet in communication with
said fluid pumping chamber and adapted to communicate
with the suction port, and check valve means in said
24

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second fluid outlet for permitting fluid flow from
and preventing fluid flow into said fluid pumping
chamber.
17. A fluid pumping device in
accordance with Claim 16 wherein said selective
controlling means comprises a valve housing defining
a valve chamber, a first suction passageway extending
between said fluid outlet and said valve chamber, a
first fluid passageway extending from said valve
chamber to said fluid inlet, a second suction
passageway extending from said valve chamber to said
fluid metering chamber, a second fluid passageway
extending from said fluid metering chamber to said
valve chamber, a shuttle valve in said valve chamber
and moveable between a first position wherein said
first suction passageway is in communication with
said second suction passageway and said first fluid
passageway is not in communication with said second
fluid passageway, and a second position wherein said
first fluid passageway is in communication with said
second fluid passageway and said first suction
passageway is not in communicaton with said second
suction passageway, and means connecting said shuttle
valve to said moveable wall and providing for lost
motion between said shuttle valve and said moveable
wall.

18. A fluid pumping device in
accordance with Claim 17 wherein said valve chamber
includes a first end and a second end, and wherein
said first and second suction passageways are in
communication with said first end of said valve
chamber, and wherein said first and second
passageways are in communication with said second end
of said valve chamber.
19. A fluid pumping device in
accordance with Claim 17 wherein said selective
controlling means further includes detent means for
alternately biasing said shuttle valve towards said
first position and said second position.
20. A fluid pumping device in
accordance with Claim 17 wherein said biasing means
for moving said movable wall in the opposite
direction comprises a spring in said fluid metering
chamber and extending between said movable wall and
said pump housing.
21. A fluid pumping device in
accordance with Claim 17 and further including means
for continuing the supply of fluid to the suction
port when said fluid outlet is not in communication
with said fluid metering chamber.
26

22. A fluid proportioning device in
accordance with Claim 21 wherein said supply
continuation means comprises a housing defining a
supply recess a supply movable wall which is located
in said supply recess and which cooperates with said
supply recess to define a variable volume supply
chamber, a fluid port communicating with said supply
chamber, said fluid outlet, and the suction port so
that suction present at the suction port moves said
supply movable wall in one direction so that said
supply chamber supplies fluid to the suction port
when said fluid outlet it not in communication with
said fluid metering chamber, and means for biasing
said supply movable wall in the opposite direction to
fill said supply chamber with fluid when said fluid
outlet is in communication with said fluid metering
chamber.
27

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23. A marine propulsion device
including a propeller, a lower unit rotatably
supporting said propeller, an upper unit supported by
said lower unit and including an engine, and a fuel
pump including a suction port, drive train means for
rotating said propeller, said drive train means being
driven by said engine, and a fluid pumping device
comprising a pump housing defining a recess, a
moveable wall which is in said recess and which
cooperates with said recess to define a variable
volume fuel metering chamber, biasing means for
moving said moveable wall in one direction, a fuel
outlet communicable with said fuel metering chamber
and communicating with said suction port, so that
suction present at the suction port communicates with
said fuel metering chamber and thereby moves said
moveable wall in the opposite direction against the
action of said biasing means when said fuel metering
chamber is in communication with said fuel outlet, a
fuel inlet communicable with said fuel metering
chamber and adapted to communicate with a source of
fuel, means for selectively controlling communication
of said fuel metering chamber with said fuel outlet
and said fuel inlet, a bore which is in said pump
housing and which extends perpendicularly from said
moveable wall and which partially defines a variable
volume oil pumping chamber, a piston which is
received in said bore and which includes a first end
and a second end, said first end being attached to
said moveable wall and said second end cooperating
with said bore to form said variable volume oil
pumping chamber, an oil inlet in communication with
said oil pumping chamber and adapted to communicate
with a source of oil, check valve means in said oil

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inlet for permitting oil flow into and preventing
fluid flow from said oil pumping chamber, an oil
outlet in communication with said oil pumping chamber
and adapted to communicate with the suction port, and
check valve means in said oil outlet for permitting
oil flow from and preventing oil flow into said oil
pumping chamber.

24. A fluid pumping arrangement
including a fluid pump including a suction port, and
a fluid pumping device comprising a pump housing
defining a recess, a movable wall which is located in
said recess and which cooperates with said recess to
define a variable volume pumping chamber, biasing
means for moving said movable wall in one direction,
a fluid inlet adapted to communicate with a source of
fluid, valve means for alternately communicating said
pumping chamber with said suction port so that said
suction port drains fluid from said pumping chamber,
thereby displacing said movable wall in the direction
opposite to said one direction, and with said fluid
inlet so that fluid at said inlet is supplied to said
pumping chamber in response to wall movement in said
one direction, and means for operating said valve
means in response to movement of said movable wall.
25. A fluid pumping arrangement in
accordance with Claim 24 wherein said fluid pumping
device further includes means responsive to movement
of said movable wall for pumping a second fluid

26. A marine propulsion device
including a fluid pump including a suction port, and
a fluid pumping device comprising a pump housing
defining a recess, a movable wall which is located in
said recess and which cooperates with said recess to
define a variable volume pumping chamber, biasing
means for moving said movable wall in one direction,
a fluid outlet communicable with said fluid pumping
chamber and communicating with said suction port so
that suction present at said suction port
communicates with said fluid pumping chamber and
thereby moves said movable wall in the opposite
direction against the action of said biasing means
when said fluid pumping chamber is in communication
with said fluid outlet, a fluid inlet communicable
with said fluid pumping chamber and adapted to
communicate with a source of fluid, means for
selectively controlling communication of said fluid
pumping chamber with said fluid inlet, and means for
continuing the flow of fluid to said suction port
when said fluid outlet is not in communication with
said fluid pumping chamber, said supply continuation
means comprising a housing defining a supply recess,
a supply movable wall which is located in said supply
recess and which cooperates with said supply recess
to define a variable volume supply chamber, a fluid
port communicating with said supply chamber, said
fluid outlet, and said suction port so that suction
present at said suction port moves said supply
31

(Claim 26 con't.)
movable wall in one direction to thereby supply fluid
to said suction port from said supply chamber when
said fluid outlet is not in communication with said
fluid pumping chamber, and means for biasing said
supply movable wall in the opposite direction to
thereby fill said supply chamber with fluid when said
fluid outlet is in communication with said fluid
pumping chamber.
32

27. A fluid pumping arrangement
including a fluid pump including a suction port, and
a fluid pumping device comprising a pump housing
defining a recess, a movable wall which is located in
said recess, and which cooperates with said recess to
define a variable volume pumping chamber, said
housing also including an inlet port and an outlet
port in spaced relation to said inlet port, a fluid
inlet adapted to communicate with a source of fluid,
means operable for alternately communicating said
outlet port with said suction port and communicating
said inlet port with said fluid inlet, and means for
effecting reciprocating movement of said movable wall
in response to alternate communication of said inlet
port with said fluid inlet and communication of said
outlet port with said suction port, whereby, when
said fluid pumping chamber is in communication with
said fluid inlet, said movable wall is displaced in
one direction to fill said pumping chamber with
fluid, and whereby, when said fluid pumping chamber
is in communication with said suction port said
movable wall is displaced in the direction opposite
to said one direction to empty fluid from said
pumping chamber.
28. A fluid pumping arrangement in
accordance with Claim 27 wherein said fluid pumping
device further includes means responsive to movement
of said movable wall for operating said selective
communication means.
33

29. A fluid pumping arrangement in
accordance with Claim 27 wherein said reciprocative
moving means comprises biasing means for moving said
movable wall in said one direction.
30. A fluid pumping arrangement in
accordance with Claim 27 and further including means
for continuing the supply of fluid to said suction
port when said suction port is not in communication
with said fluid pumping chamber.
34

31. A fluid pumping arrangement
including a fluid pump including a suction port, and
a fluid pumping device comprising a pump housing
defining a recess, a movable wall which is located in
said recess and which cooperates with said recess to
define a variable volume pumping chamber, a fluid
inlet adapted to communicate with a source of fluid,
means alternately operable for selectively
communicating said fluid pumping chamber with said
fluid inlet and with said suction port, and means for
effecting reciprocating movement of said movable wall
in response to alternate communication of said fluid
pumping chamber with said suction port and with said
fluid inlet, whereby, when said fluid pumping chamber
is in communication with said fluid inlet, said
movable wall is displaced in one direction to fill
said pumping chamber with fluid, and whereby, when
said fluid pumping chamber is in communication with
said suction port, said movable wall is displaced in
the direction opposite to said one direction to empty
fluid from said pumping chamber, said means for
pumping a second fluid comprising a bore which is in
said pump housing and which extends perpendicularly
from said movable wall and which partially defines a
second variable volume fluid pumping chamber, a
piston which is received in said bore and which
includes a first end and a second end, said first end
being attached to said movable wall and said second
end cooperating with said bore to form said second
variable volume fluid pumping chamber, a second fluid
inlet in communication with said second fluid pumping
chamber and adapted to communicate with a second
source of fluid, check valve means in said second
fluid inlet for permitting fluid flow into and

(Claim 31 con't.)
preventing fluid flow from said second fluid pumping
chamber, a fluid outlet in communication with said
second fluid pumping chamber and adapted to
communicate with said suction port, and check valve
means in said second fluid outlet for permitting
fluid flow from and preventing fluid flow into said
second fluid pumping chamber.
36

32. A fluid pumping arrangement
including a fluid pump including a suction port, and
a fluid pumping device comprising a pump housing
defining a recess, a movable wall which is located in
said recess and which cooperates with said recess to
define a variable volume pumping chamber, a fluid
inlet adapted to communicate with a source of fluid,
means alternately operable for selectively
communicating said pumping chamber with said fluid
inlet and with said suction port, means for effecting
reciprocating movement of said moveable wall in
response to alternate communication of said fluid
pumping chamber with said suction port and with said
fluid inlet, whereby, when said fluid pumping chamber
is in communication with said fluid inlet, said
movable wall is displaced in one direction to fill
said pumping chamber with fluid, and whereby, when
said fluid pumping chamber is in communication with
said suction port, said movable wall is displaced in
the direction opposite to said one direction to empty
fluid from said pumping chamber, and means for
continuing the supply of fluid to said suction port
when said suction port is not in communication with
said fluid pumping chamber, said supply continuation
means comprising a housing defining a supply recess,
a supply movable wall which is located in said supply
recess and which cooperates with said supply recess
to define a variable volume supply chamber, a fluid
port communicating with said supply chamber and said
suction port so that suction present at said suction
port moves said supply moveable wall in one direction
to thereby supply fluid to said suction port from
said supply chamber when said suction port is not in
communication with said fluid pumping chamber,
37

(Claim 32 con't.)
and means for biasing said supply movable wall in the
opposite direction to thereby fill said supply
chamber with fluid when said suction port is in
communication with said fluid pumping chamber.
33. A marine propulsion device
including a propeller, a lower unit rotatably
supporting said propeller, an upper unit supported by
said lower unit and including an engine, and a fuel
pump including a suction port, drive train means
driven by said engine for rotating said propeller,
and a fluid pumping device comprising a pump housing
defining a recess, a movable wall which is located in
said recess and which cooperates with said recess to
define a variable volume pumping chamber, biasing
means for moving said movable wall in one direction,
a fluid inlet adapted to communicate with a source of
fluid, valve means for alternately communicating said
pumping chamber with said suction port so that said
suction port drains fluid from said pumping chamber,
thereby displacing said movable wall in the direction
opposite to said one direction, and with said fluid
inlet so that fluid at said inlet is supplied to said
pumping chamber in response to wall movement in said
one direction, and means for operating said valve
means in response to movement of said movable wall.
38

34. A marine propulsion device
including a propeller, a lower unit rotatably
supporting said propeller, an upper unit supported by
said lower unit and including an engine, and a fuel
pump including a suction port, drive train means
driven by said engine for rotating said propeller,
and a fluid pumping device comprising a pump housing
defining a recess, a movable wall which is located in
said recess, which cooperates with said recess to
define a variable volume pumping chamber, and which
includes an inlet port and an outlet port in spaced
relation to said inlet port, a fluid inlet adapted to
communicate with a source of fluid, means operable
for alternately communicating said outlet port with
said suction port and communicating said inlet port
with said fluid inlet, and means for effecting
reciprocating movement of said movable wall in
response to alternate communication of said inlet
port with said fluid inlet and communication of said
outlet port with said suction port, whereby, when
said fluid pumping chamber is in communication with
said fluid inlet, said movable wall is displaced in
one direction to fill said pumping chamber with
fluid, and whereby, when said fluid pumping chamber
is in communication with said suction port, said
movable wall is displaced in the direction opposite
to said one direction to empty fluid from said
pumping chamber.
39

35. A marine installation comprising a
marine propulsion device including a rotatably
mounted propeller, an engine drivingly connected to
said propeller, and a fuel pump for supplying fuel to
said engine, said fuel pump including a suction port,
and an assembly for separately storing oil, for
pumping oil, and for delivering fuel to said fuel
pump, said assembly including an oil reservoir, and
an apparatus located adjacent said oil reservoir and
including a first inlet communicating with said oil
reservoir, a second inlet adapted to communicate with
a source of fuel, an outlet communicating with said
suction port, and means operative in response to
suction at said outlet for delivering fuel to said
fuel pump via said outlet and for pumping oil.
36. A marine installation comprising a
marine propulsion device including a rotatably
mounted propeller, an engine drivingly connected to
said propeller, and a fuel pump for supplying fuel to
said engine, said fuel pump including a suction port,
and an assembly for separately storing oil, for
pumping oil, and for delivering fuel to said fuel
pump, said assembly including a tank having an
interior providing a fuel reservoir, an oil reservoir
located within said interior of said tank, and an
apparatus supported by said tank and including a
first inlet communicating with said oil reservoir, a
second inlet communicating with said fuel reservoir,
an outlet communicating with said suction port, and
means operative in response to suction at said outlet
for delivering fuel to said fuel pump via said outlet
and for pumping oil.

37. A marine installation as set forth
in Claim 36 wherein said tank is located remotely
from said marine propulsion device.
38. An assembly for separately storing
oil, for pumping oil, and for delivering fuel to a
fuel pump for a two-stroke internal combustion
engine, the fuel pump including a suction port, said
assembly comprising an oil reservoir, and an
apparatus located adjacent said oil reservoir and
including a first inlet communicating with said oil
reservoir, a second inlet adapted to communicate with
a source of fuel, an outlet adapted to communicate
with the suction port, and means operative in
response to suction at said outlet for delivering
fuel from said outlet and for pumping oil.
39. An assembly for separately storing
oil, for pumping oil, and for delivering fuel to a
fuel pump for a two-stroke internal combustion
engine, the fuel pump including a suction port, said
assembly comprising a tank having an interior
providing a fuel reservoir, an oil reservoir located
within said interior of said tank, and an apparatus
supported by said tank and including a first inlet
communicating with said oil reservoir, a second inlet
communicating with said fuel reservoir, an outlet
adapted to communicate with the suction port, and
means operative in response to suction at said outlet
for delivering fuel to the fuel pump via said outlet
and for pumping oil.
41

40. A marine installation comprising a
marine propulsion device including a rotatably
mounted propeller, an engine drivingly connected to
said propeller, and a fuel pump for supplying fuel to
said engine, said fuel pump including a suction port,
and an assembly for separately storing oil and fuel,
for pumping oil, and for delivering fuel to said fuel
pump, said assembly including a fuel reservoir, an
oil reservoir, and an apparatus including a first
inlet communicating with said oil reservoir, a second
inlet communicating with said fuel reservoir, an
outlet communicating with said suction port, and
means operative in response to suction at said outlet
for delivering fuel to said fuel pump via said
outlet, and for pumping oil.
41. A marine installation as set forth
in Claim 40 wherein said oil reservoir and said fuel
reservoir are located remotely from said marine
propulsion device.
42

42. An assembly for separately storing
oil and fuel, for pumping oil, and for delivering
fuel to a fuel pump for a two-stroke internal
combustion engine, the fuel pump including a suction
port, said assembly comprising a fuel reservoir, an
oil reservoir, and an apparatus including a first
inlet communicating with said oil reservoir, a second
inlet communicating with said fuel reservoir, an
outlet adapted to communicate with the suction port,
and means operative in response to suction at said
outlet for delivering fuel from said outlet, and for
pumping oil.
43. A marine installation comprising a
marine propulsion device including a rotatably
mounted propeller, an engine drivingly connected to
said propeller, and a fuel pump for supplying fuel to
said engine, said fuel pump including a suction port,
and apparatus for pumping oil, and for delivering
fuel to said fuel pump, said apparatus including a
first inlet adapted to communicate with a source of
oil, a second inlet adapted to communicate with a
source of fuel, an outlet communicating with said
suction port, and means operative in response to
suction at said outlet for delivering fuel to said
fuel pump via said outlet, and for pumping oil.
44. Apparatus for pumping oil and for
delivering fuel to a fuel pump for a two-stroke
internal combustion engine, the fuel pump including a
suction port, said apparatus comprising a first inlet
adapted to communicate with a source of oil, a
second inlet adapted to communicate with a source of
fuel, an outlet adapted to communicate with the
suction port, and means operative in response to
suction at said outlet for delivering fuel from said
outlet, and for pumping oil.
43

Description

123~g~
FLUID PUMPING DEVICE
FOR USE WITH A FLUID PUMP
BACKGROUND OF THE I MENTION
This invention relates to fluid pumping
devices adapted to be driven by a fluid pump, ant
more particularly, to fluid pumping arrangements for
marine propulsion devices.
Attention it directed to the pumps
disclosed in the US. Letterman, et at. Patent
3,765,80~, issued October I 1973, and in the US.
Sweet et at. Patent 2,951,745, issued September 6,
lg60 .

12~2~7
--2--
SUMMERY OF THE INVENTION
This invention provides a fluid pumping
arrangement including a fluid pump including a
suction port, and a fluid pumping device comprising a
pump housing defining a recess, and a movable wall
which is located in the recess and which cooperates
with the recess to define a variable volume pumping
chamber. The pumping device also includes a fluid
inlet communicable with the fluid pumping chamber and
adapted to communicate with a source of fluid, a
fluid outlet communicable with the fluid pumping
chamber and communicating with the suction port, and
means for effecting reciprocating movement of the
movable wall in response to alternate communication
of the fluid pumping chamber with the fluid outlet
and with the fluid inlet, whereby, when the fluid
pumping chamber it in communication with the fluid
inlet, the movable wall is displaced in one
direction to fill the pumping chamber with fluid, and
whereby, when the fluid pumping chamber is in
communication with the fluid outlet, the movable
wall is displaced in the opposite direction to empty
fluid from the pumping chamber.
In one embodiment, the reciprocative
moving means comprises biasing means for moving the
movable wall in the one direction, and means for
selectively controlling communication of the fluid
pumping chamber with the fluid outlet and with the
fluid inlet. I've fluid pumping device also includes
means responsive Jo movement of the movable wall for
pumping a second fluid.
In one embodiment, the fluid pumping
arrangement further includes means for continuing the

supply of fluid to the suction port when the fluid
outlet is not in communication with the fluid pumping
chamber.
This invention also provides a fluid
pumping device comprising a pump housing defining a
recess including therein a movable wall which
cooperates wit the recess to define a variable
volume fluid metering chamber The device also
includes biasing means for moving the movable wall in
one direction, a fluid outlet communicable with the
fluid metering chamber and adapted to communicate
with a suction port of a fluid pump so that suction
present at the suction port communicates with the
fluid metering chamber and moves the movable wall in
the opposite direction against tune action of the
biasing means when the fluid chamber is in
communication with the fluid outlet. The device also
includes a fluid inlet communicable with the fluid
metering chamber and adapted to communicate with a
source of fluid, and means for selectively
controlling communication of the fluid chamber with
the fluid inlet and the fluid outlet.
The fluid pumping device also includes
a bore which is in the pump housing and which extends
perpendicularly from the movable wall and which
partially defines a variable volume fluid pumping
chamber, and a piston which is received in the bore
and which includes a first end and a second end. The
first end is attached to the movable wall and the
second end cooperates with the bore to form the
variable volume fluid pumping chamber. The device
also includes a second fluid inlet in communication
with the fluid pumping chamber and adapted to

I I
I
communicate with a second source of fluid, and check
valve means in the second fluid inlet for permitting
fluid flow into and preventing fluid flow from the
fluid pumping chamber. The device also includes a
second fluid outlet in communication with the fluid
pumping cnamDer and adapted to communicate with the
suction port, and check valve means in the second
fluid outlet for permitting fluid flow from and
preventing fluid flow into the fluid pumping chamber.
In one embodiment, the fluid pumping
device is included in a marine propulsion device, and
the source of fluid is a source of fuel, and the
second source of fluid is a source of oil.
The invention also provides a fluid
pumping arrangement including a fluid pump including
a suction port, and a fluid pumping device comprising
a pump housing defining a recess, a movable wall
which is located in the recess and which cooperates
with the recess to define a variable volume pumping
chamber, biasing means for moving the movable wall in
one direction, a fluid inlet adapted to communicate
with a source of fluid, valve means for alternately
communicating the pumping chamber with the suction
port so that the suction port drains fluid from the
pumping chamber, thereby displacing the movable wall
in the direction opposite to the one direction, and
with the fluid inlet so that fluid at the inlet is
supplied to the pumping chamber in response to wall
movement in the one direction, and means for
operating the valve means in response to movement of
the movable wall.

-3B-
Tune invention also provides a fluid
pumping arrangement including a fluid pump including
a suction port, and a fluid pumping device comprising
a pump housing defining a recess, a movable wall
winch is located in the recess, and which cooperates
with the rosiest define a variable volume pumping
chamber, which housing also includes an inlet port
and an outlet port in spaced relation to the inlet
port, a fluid inlet adapted to communicate with a
source of fluid, means operable for alternately
communicating the outlet port with the suction port
and communicating the inlet port with the fluid
inlet, and means for effecting reciprocating movement
of the movable wall in response to alternate
communication of the inlet port with the fluid inlet
and communication of the outlet port with the suction
port, whereby when the fluid pumping chamber is in
communication with the fluid inlet, the movable wall
is displaced in one direction to fill the pumping
chamber with fluid, and whereby, when the fluid
pumping chamber is in communication with the suction
port, the movable wall is displaced in the direction
opposite to the one direction to empty fluid from the
pumping chamber.
The invention also provides a fluid
pumping arrangement including a fluid pump including
a suction port, and a fluid pumping device comprising
a pump housing defining a recess, a movable wall
which is located in the recess and which cooperates
with the recess to define a variable volume pumping
chamber, a fluid inlet adapted to communicate with a
source of fluid, means alternately operable for
selectively communicating the fluid pumping chamber

~32 I
-3C-
with the fluid inlet and with the suction port, and
means for effecting reciprocating movement of the
movable wall in response to alternate communication
of the fluid pumping chamber with the suction port
and With the fluid inlet, whereby, when the fluid
pumping chamber is in communication with the fluid
inlet, the movable wall is displaced in one direction
to fill the pumping chamber with fluid, and whereby,
when the fluid pumping chamber is in colmnunication
with the suction port, the movable wall is displaced
in the direction opposite to the owe direction to
empty fluid from the pumping chamber, which means for
pumping a second fluid comprises a bore which is in
the pump housing and which extends perpendicularly
from the movable wall and which partially defines a
second variable volume fluid pumping chamber, a
piston which is received in the bore and which
includes a first end and a second end, the first end
being attained to the movable wall and the second end
cooperating with the bore to form the second variable
volume fluid pumping chamber, a second fluid inlet in
communication with the second fluid pumping chamber
and adapted to communicate with a second source of
fluid, check valve means in the second fluid inlet
for permitting fluid flow into and preventing fluid
flow from the second fluid pumping chamber, a fluid
outlet in communication with the second fluid pumping
chamber and adapted to communicate with the suction
port, and check valve means in the second fluid
outlet for permitting fluid flow from and preventing
fluid flow into the second fluid pumping chamber.

2 7
-ED-
The invention also provides a marine
propulsion device including a propeller, a lower unit
rotatable supporting the propeller, an upper unit
supported by the lower unit and including an engine,
and a fuel pump including a suction port, drive train
means driven by the engine for rotating the
propeller, and a fluid pumping device comprising a
pump housing defining a recess, a movable wall which
is located in the recess and which cooperates with
the recess to define a variable volume pumping
chamber, biasing means for moving the movable wall in
one direction, a fluid inlet adapted to communicate
with a source of fluid, valve means for alternately
communicating the pumping chamber with the suction
port so that the suction port drains fluid from the
pumping chamber, thereby displacing the movable wall
in the direction opposite to the one direction, and
with the fluid inlet so that fluid at the inlet is
supplied to the pumping chamber in response to wall
movement in the one direction, and means for
operating the valve means in response to movement of
the movable wall.
The invention also provides a marine
propulsion device including a propeller, a lower unit
rotatable supporting the propeller, an upper unit
supported by the lower unit and including an engine,
and a fuel pump including a suction port, drive train
means driven by the engine for rotating the
propeller, and a fluid pumping device comprising a
pump housing defining a recess, a movable wall which
is located in the recess, which cooperates with the
recess to define a variable volume pumping chamber,
and which includes an inlet port and an outlet port

~2~2~
-YE-
in spaced relation to the inlet port, a fluid inlet
adapted to communicate with a source of fluid, means
operable for alternately communicating the outlet
port with the suction port and communicating the
inlet port with the fluid inlet, and means for
effecting reciprocating movement of the movable wall
in response to alternate communication of the inlet
port with the fluid inlet and communication of the
outlet port with the suction port, whereby, when the
fluid pumping chamber is in communication with the
fluid inlet, the movable wall is displaced in one
direction to fill the pumping chamber with fluid, and
whereby, when the fluid pumping chamber is in
communication with the suction port, the movable wall
is displaced in the direction opposite to the one
it direction to empty fluid from the pumping chamber.
The invention also provides a marine
installation comprising a marine propulsion device
including a rotatable mounted propeller, en- engine
drivingly connected to the propeller, and a fuel pump
for supplying fuel to the engine, which fuel pump
includes a suction port, and an assembly for
separately storing oil, for pumping oil, and for
delivering fuel to the fuel pump, which assembly
includes an oil reservoir, and an apparatus located
adjacent the oil reservoir and including a first
inlet colnmunicating with the oil reservoir, a second
inlet adapted to communicate with a source of fuel,
an outlet communicating with the suction port and
means operative in response to suction at the outlet
for delivering fuel to the fuel pump via the outlet
and for pumping oil.

~-2329~7
- OF - 7363-656
The invention also provides a marine
installation comprising a marine propulsion device
including a rotatable mounted propeller, an engine
drivingly connected to the propeller, and a fuel pump
for supplying fuel to the engine, which fuel pump
includes a suction port, and an assembly for
separately storing oil, for pumping oil, and for
delivering fuel to the fuel pump, which assembly
includes a tank having an interior providing a fuel
reservoir, an oil reservoir located within the
interior of the tank, and an apparatus supported by
the tank and including a first inlet communicating
with the oil reservoir, a second inlet communicating
with the fuel reservoir, an outlet communicating with
the suction port, and means operative in response to
suction at the outlet for delivering fuel from the
outlet and for pumping oil.
The invention also provide an assembly
for separately storing oil, for pumping oil, and for
delivering fuel to a fuel pump for a two stroke
internal combustion engine, the fuel pump including a
suction port, which assembly comprises an oil
reservoir, and an apparatus located adjacent the oil
reservoir and including a first inlet communicating
with the oil reservoir, a second inlet adapted to
communicate with a source of fuel, an outlet adapted
to communicate with the suction port, and means
operative in response to suction at the outlet for
delivering fuel to the fuel pump via the outlet and

1 2 32 I
- 3G - 7363-656
for pumping oil.
The invention also provides an assembly
for separately storing oil, for pumping oil, and for
delivering fuel to a fuel pump for a two stoke
internal combustion engine, the fuel pump including a
suction port, which assembly comprises a tank having
an interior providing a fuel reservoir, an oil
reservoir located within the interior of the tank,
and an apparatus supported by the tank and including
a first inlet communicating with the oil reservoir, a
second inlet communicating with the fuel reservoir,
an outlet adapted to communicate with the suction
port, and means operative in response to suction at
the outlet for delivering fuel to the fuel pump via
the outlet and for pumping oil
The invention also provides a marine
installation comprising a marine propulsion device
including a rotatable mounted propeller, an engine
drivingly connected to the propeller, and a fuel pump
for supplying fuel to the engine, which fuel pump
includes a suction port, and an assembly for
separately storing oil and fuel, for pumping oil, and
for delivering fuel to the fuel pump, which assembly
includes a fuel reservoir, an oil reservoir, and an
apparatus including a first inlet communicating with
the oil reservoir, a second inlet communicating with
the fuel reservoir, an outlet communicating with the
suction port, and means operative in response to

- OH - i 2 7
7363-6~6
suction at the outlet for delivering fuel to said
fuel pump via the outlet, and for pumping oil.
The invention also provides an assembly
for separately storing oil and fuel for pumping oil,
and for delivering fuel to a fuel pump for a
two-stroke internal combustion engine, the fuel pump
including a suction port, which assembly comprises a
fuel reservoir, an oil reservoir, and an apparatus
including a first inlet communicating with the oil
reservoir, a second inlet communicating with the fuel
reservoir, an outlet adapted to communicate with the
suction port, and means operative in response to
suction at the outlet for delivering fuel from the
outlet, and for pumping oil.
The invention also provides a marine
installation comprising a marine propulsion device
including a rotatable mounted propeller, an engine
drivingly connected Jo the propeller, and a fuel pump
for supplying fuel to the engine, which fuel pump
include a suction port, and apparatus for pumping
oil, and for delivering fuel to the fuel pump, which
apparatus includes a first inlet adapted to
communicate with a source of oil, a second inlet
adapted to communicate with a source of fuel, an
outlet communicating with the suction port, and means
operative in response to suction at the outlet for
delivering fuel to the fuel pump via the outlet and
for pumping oil.

23~ 7
- - 7363~656
The invention also provides apparatus
for pumping oil and for delivering fuel to a fuel
pump for a two-s~roke internal combustion engine, the
fuel pump including a suction port, which apparatus
comprising a first inlet adapted to communicate with
a source of oil, a second inlet adapted to
communicate with a source of fuel, an outlet adapted
to communicate with the suction port, and means
operative in response to suction at the outlet for
delivering fuel from the outlet, and for pumping oil
One of the features of this invention
is the provision of a fluid pumping device, for a
fluid such as oil, which device can be located
adjacent an oil source so that the length of the oil
line between the device and the source of oil is
small and little or no priming of the oil line is
required.
Another of the features of this
invention is the provision of such a device which can
pump oil and apportion fuel and oil for a two cycle
internal combustion engine when used in an
application such as a marine propulsion device.
Other features and advantages of
embodiments of the invention will become apparent
upon reviewing the fulling drawings, the detailed
description and the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a side view of a marine
propulsion device mounted on a marine vehicle. The
propulsion device includes a fluid pumping

arrangement (illustrated schematically) which
embodies various of the features of the invention.
Fig. 2 is a cross-~ectional view of a
fluid pumping device which embodies various of the
features of the invention.
Fig. 8 is a cro~s-sectional view of
another embodiment of a portion of the fluid pumping
device shown in Fig. 2.
Before explaining at least one
embodiment of the invention in detail, it is to be
understood that the invention is not limited in its
application to the details of construction and the
arrangement of the components set forth in the
following description or illustrated in the
drawing. The invention is capable of other
embodiments and of being practiced or carried out in
various ways. Allah, it is to be understood that the
phraseology and terminology employed herein is for
the purposes of description and should not be
regarded as limiting.
DESCRIPTION OF PREFERRED EMBODIMENTS
A illustrated in the drawing, this
invention provides a fluid pumping arrangement
including a fluid pumping device 10 for pumping
fluids such as fuel and oil. and a fluid or fuel pump
52. More particularly, as illustrated in Figure 1.
the device 10 and fuel pump 52 are included in a
marine propulsion device 14 mounted on a marine
vehicle 18~ but the device and fluid pump can also be
used in other applications where fluid pumping it
desired.

23~ I
--6--
The marine propulsion device 14
includes a lower unit 22 rotatable supporting a
propeller 26 and a drive train 30 for wrung the
propeller Z6. The propulsion device 14 also includes
an upper unit 34 which is attached to the lower unit
22 and which includes a two-stroke engine 42 for
driving the drive train 30. The two-stroke internal
combustion engine 42 comprises an engine block I
and a crankcase 50, and the fuel pump 52, and a
carburetor 54 attached by suitable means to the
crankcase So. The device lo supplies fuel and oil to
the fuel pump 52 through conduit 64 and is mounted
adjacent a source of fuel and a source of oil located
within the marine vehicle 18. The device lo is
connected to fuel and owl conduits 66 and 70,
respectively, as described in more detail below.
As illustrated in Figure 2, the fluid
pumping device lo comprises a metering portion 71 for
metering a fluid such as fuel and a pumping portion
72 for pumping a fluid such as oil. The fuel
metering portion 71 communicates with the source of
fuel and a suction port 73 to the fuel pump 52. The
fuel metering portion 71 is driven by the suction
present at the suction port 73, and drives the oil
pumping portion 72 while metering fuel, as more fully
described hereinafter.
The fuel metering portion 71 includes a
pump housing 74 which defines a recess 78. The
device 10 also includes a movable wall 82 which is
located in the recess 78 and which cooperate with
the recess 78 to define a variable volume furl
metering or fuel pumping chamber 86, and an air
chamber 90. A vent 92 communicates the air chamber
90 with ambient air.

--7--
The movable wall By comprises a
flexible membrane 94 peripherally connected to the
pump housing I and a pair of plates secured on
opposite sides of the flexible membrane 94 to form a
piston portion 98 centrally located in the movable
wall 82.
The fuel metering portion 71
communicates with the suction port 73 to the fuel
pump 52 so suction present at the suction port 73 can
move the movable wall 82 and meter or pump fuel from
the fuel source. More particularly, the fuel
metering portion 71 comprises a fuel outlet 122 in
the housing 74 and in communication with the suction
port 73 by the conduit 64 so suction present at the
suction port 73 moves the movable wall 82 in one
direction when the fuel outlet 122 is in
communication with the fuel chamber 86, as described
in more detail below. The metering portion 71 also
includes a fuel inlet 126 in the housing 74 and in
communication with the fuel source by conduit 66,
means 130 for selectively controlling communication
of the fuel chamber 86 with the fuel outlet 122 and
the fuel inlet 126, and means for moving the movable
wall I in the opposite direction when the fuel
chamber 86 is in communication with the fuel inlet
126.
When the suction pout 73 is in
communication with the fuel chamber 86, suction
causes pressure differential across the movable wall
82 which in turn causes the volume of fuel chamber 86
to reduce, thereby resulting in the removal of fuel
from the fuel metering chamber 86.
After the fuel chamber 86 discharges
fuel and the movable wall 82 is fully displaced in

eye
one direction, the fuel inlet 126 provides means for
allowing fuel at atmospheric pressure to enter the
fuel chamber 86 to eliminate the driving pressure
differential across the movable wall 82, thereby
permitting reverse movement of the movable wall 82.
leans is provided to prohibit the
withdrawal of fuel from the fuel chamber 86, and to
permit fuel to flow into the fuel chamber 86 from the
fuel source. Such means is a one-way valve 142
included in the fuel inlet 126.
The means provided for moving the
movable wall 82 in the opposite direction when the
fuel chamber 86 is in communication with the fuel
inlet 126 is in the form of a spring 154 which is in
the fuel chamber 90 between the portion of the pump
housing 74 forming part of the fuel chamber 86, and
the piston portion spa of the movable wall 82. The
spring 154 is operative to move the movable wall 82
in the opposite direction, thereby increasing thy
volume of the fuel chamber 86 and pulling fuel into
the fuel metering chamber 86 through conduit 66 from
the fuel source.
As illustrated in Fig. 2, the selective
controlling means 130 comprises a valve housing 170
which, in the embodiment shown, is integral with the
pump housing 74, and which defines a valve chamber
174, a first suction passageway 178 which extends
between the fuel outlet 122 and the valve chamber
174, and a first fuel passageway 182 which extends
from the valve chamber 174 to the fuel inlet 126.
The selective controlling means 130 also includes a
second suction passageway 190 which extends from the
valve chamber 174 and communicates through an inlet
port 191 with the fuel chamber 86, a second fuel
passageway 194 which extends through an outlet port
195 from the fuel

chamber a to the valve chamber 174, and a shuttle
valve aye which is received in the valve chamber 174.
The valve chamber 174 includes a first
end 202 and a second end 204, and the first and
second suction passageways 178 and 190, respectively,
are on communication with the first end 202 of the
valve chamber 174, and the first and second fuel
passageways 182 and 194, respectively, are in
communication with the second end 204 of the valve
chamber 174.
The shuttle valve 198 is movable
between a first position, wherein the fuel outlet 12Z
is in communication with the fuel chamber I and a
second position, wherein the fuel inlet 126 is in
communication with the fuel chamber 86. In the first
position, the first end 202 of the valve chamber is
open and the second end 204 of the valve chamber is
sealed by the shuttle valve 198. As a result, in the
first position, the first suction passageway 178 is
in communication with the second suction passageway
190, and the first fuel passageway 182 is no in
communication with the second fuel passageway 194.
In the second position, the second end
204 of the valve chamber 174 is open and the first
25 end Z02 of the valve chamber 174 is sealed by the
shuttle valve 198. As a result, in this second
position, the first fuel passageway 182 is in
communication with the second fuel passageway 194,
and the first suction passageway 178 is not in
communication with the second suction passageway 194.
The selective controlling means 130
also includes means for connecting the shuttle valve
198 to the movable wall 82 and for permitting lost
motion between the shuttle valve 198 and the movable

~3~7
--10--
wall 82. This lost motion means insures the shuttle
valve 198 does not move from the first position to
the second position until the movable wall I is
fully displaced in one direction. Likewise, the lost
motion means insures the shuttle valve 198 moves back
in the other direction, from the second position to
the first position, only wren the movable wall 82 is
fully displaced in the opposite direction.
The connecting and lost motion means
comprises a rod 210 with an end which is attached, by
suitable means, to the piston portion 98 of the
movable wall 82. The rod 210 extends through a bore
212 in the housing 74 to the shuttle valve 198, and a
seal 213 is provided to prevent the passage ox fluid
15 around the rod 210 through the bore 212.
The other end 214 of the rod 210 is
slid ably received and secured in a recess 21~ in the
shuttle valve 19~. More particularly, the rod 210
extends through an opening 222 into the recess 218 in
20 the shuttle valve 198, and the end 214 of the rod 210
is received in the recess 218 and is larger than the
opening 222 through which the rod Z10 extends. The
end 214 of the rod 210 it also spaced apart from the
ends of the recess 218 so lost motion is provided
25 between the shuttle valve 198 and the rod 210.
In order to prevent the shuttle valve
198 from being located centrally between the first
and second positions, the selective controlling means
130 also includes detent means 2Z6 for alternately
biasing the shuttle valve 198 towards the first
position and the second position.
As illustrated in Fig. 2, one
embodiment of such detent means 226 comprises a
raised portion 238 incorporated into the side of the

shuttle valve 198 between the ends thereof, and a
rounded member 242 adjacent the raised portion 238
and received in a bore 246 in the side of the valve
housing 170.
The raised portion 238 of the shuttle
valve 198 includes two inclined surfaces 250 and Z52,
which come together to form a peak on the side of the
shuttle valve 198. Means in the form of a spring 254
located in the bore 246 is provided for biasing the
10 rounded member 242 towards the raised portion 238 of
the shuttle valve 198, so that the rounded member 242
acts on the inclined surfaces 250 and 252 of the
raised portion 238, urging the shuttle valve 198 in
either one direction or the other, depending on which
15 side of the raised portion 238 the rounded member 242
is on. In this manner, the shuttle valve 198 is
urged to remain in either the first or second
position until moved by the rod 210 attached to the
movable wall 82.
As illustrated in Fig. 3, another
embodiment of the detent means 226 comprises springs
230 and 234 in the shuttle valve 198. The end 214 is
again spaced from the ends of the recess 218, and one
spring 230 extends between the end 214 of the rod 210
and one end of the shuttle valve 198, while the other
spring 234 it concentric with the rod 210 and
disposed between the end 214 of the rod 210 and the
other end of the shuttle valve 198.
When the shuttle valve 19~ is in either
the first or second position, one of the springs 230
and 234 is compressed, while the other spring is
relaxed. As the end 214 of the rod 210 starts to
move from one end of the recess 218 to the other the
compressed spring begins to relax and the other

-12-
spring eventually begins to compress forcing the
shuttle valve 198 to the other position. Some
movement of the end 214 of the rod 210 is required
before the compressed spring becomes fully relaxed,
so the shuttle valve 198 is urged to remain in its
current position by the still compressed spring
despite the initial movement of the end 214 of the
rod Z10.
The spring 154 also assists in biasing
the shuttle valve 198 towards the first position.
As illustrated in Fig. 2, the oil
pumping portion 72 includes the housing 74 and means
for pumping oil in response to movement of the
movable wall 82. The oil pumping means comprises a
variable volume oil pumping chamber 262 formed by a
closed bore 266 extending from the fuel chamber 86
and perpendicularly from the movable wall 82, and by
the end 270 of a piston 274 received in the bore
266. The other end of the piston 27~ is attached by
suitable means to the piston portion I of the
movable wall 82. The volume of the oil pumping
chamber 262 therefore varies with the movement of the
movable wall 82.
In this embodiment, in order to provide
for the desired oil to fuel ratio, the oil pumping
chamber 262 is approximately one-fiftieth the size of
the fuel chamber 86. A seal 278 is also provided
around the plunger 274 to prevent the oil chamber 262
from communicating with the fuel chamber 86.
The oil pumping means also includes an
inlet 280 including a one-way valve 282 for
introducing oil into the oil chamber 262 and for
preventing oil from exiting the oil chamber 262, and

-13-
an outlet 284 including a one-way valve 286 for
permitting oil flow from -the oil chamber 262 and for
preventing oil flow into the oil chamber 262.
The oil chamfer inlet 280 is connected
by conduit 70 to the source of oil, and the outlet
284 from the oil pumping chamber 262 is in
communication through a line 288 with the fuel line
64 to the Purl pump 52. The one-way valve 286 is
spring biased so as to prevent suction present at the
suction port 73 from removing oil from the oil
pumping chamber 262. Although, in this embodiment,
the line 28~ is connected to the portion ox the
housing 74 forming the fluid outlet 122, the line 288
can be connected to the conduit 64 or the suction
port 73 in other embodiments.
Lowe device lo further includes supply
continuation and manual priming means 290 in
communication with the conduit I for priming the
fuel pump 52 and for continuing to supply fuel and
oil to the fuel pump 52 while the device lo it taking
in fuel and oil from the respective sources. More
particularly, the manual priming and supply
continuation means 290 comprises a housing 292
defining a recess 294, which recess 294 includes
wherein a movable wall 296. Although forming a
separate housing 292 in this embodiment, the housing
29~ can be integral with housing 74 in other
embodiments. The movable wall 296 cooperates with
the recess 294 to define a variable volume supply
30 chamber 298 and an air chamber 300. The air chamber
300 communicates with ambient air through a vent
302. The moveabls wall 296 comprises a flexible
membrane 304 peripherally connected to the housing

-14-
292, and a piston portion 306 centrally located in
the movable wall 296.
member 308 is connected to the piston
portion 306 and extends through the air chamber 300
and outside of the housing 292 through an opening 310
therein. The member 308 is adapted to be moved by an
operator for purposes of moving the movable wall 296
in one direction to expel fluid from the supply
chamber 298 when the means 290 is used for manual
priming.
jeans is also provided for moving the
movable wall 296 in the opposite direction after the
movable wall 296 moves in one direction Such means
is in the form of a spring 312 received in the supply
chamber 298 and disposed between the piston portion
306 and the portion of the housing 292 defining the
supply chamber 298. The supply chamber 298 is in
communication with a fluid port 316 communicating
with the conduit 64 to the fuel pump 52 by means of a
priming line 314. In other embodiments, the line 314
can be connected to the suction port 73 or the fluid
outlet 122.
Means in the form of a one-way check
valve 317 is included in the fuel outlet 122 to
permit fluid flow from the fuel outlet 122 and to
prevent fluid flow to the fuel outlet 122 when
priming the fuel pump 52 is desired.
More particularly, when the volume of
supply chamber 298 increases under the action of the
spring 312, fuel and oil are pulled into the supply
chamber 298 through the check valve 317 from the fuel
chamber 86. When manual priming is desired, the
volume of the supply chamber 298 is decreased by
moving the member 308. The fuel and oil flowing from
,.

-15-
the supply chamber aye flows to the fuel pump 52 and
not through the check valve 316.
When the fluid pumping device 10 and
fuel pump 52 are operating to supply a low of fuel
and oil to the engine 42, the supply continuation
means 290 continues supply to the fuel pump I when
fuel and oil are not flowing from the device 10.
More particularly, when the fluid outlet is not in
communication with the fuel chamber 86 because the
shuttle valve 198 is in the second position, suction
present at the suction port 73 moves the movable
wall 304 in one direction, emptying the supply
chamber 298 and supplying fuel and oil to the suction
port 73. Then, when the shuttle valve 198 is in the
first position and the fluid outlet 122 is in
communication with the fuel chamber 86, the string
312 biases the movable wall 304 in the opposite
direction to fill the supply chamber 298 with fluid
while also supplying fuel and oil to the suction port
73.
Various ox the features of the
invention are set forth in the following claims.