Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
2~i3~12~
DEVICE FOR DOSED PUMPING OF VISCOUS PRODUC'rS
Description
The invention relates to a device for dosed pumping of
viscous products, such as mayonnaise, ketchup or kebab
sauce, comprising a pump which is connected to a reservoir
of flexible material arranged in a holder.
Such devices are for instance known from the British pa-
tent application GB 2,155,117.
The drawback of these known devices is that only a fixed
quantity of product can be dosed each time pumping takes
place. The known devices are moreover difficult to clean
10 because of their construction.
The invention has for its object to provide a device for
pumping viscous products which does not have these draw-
backs.
This is achieved by the invention in that the pump is a
~j 15 suction pump, the suction side of which is connected to an
~¦ outlet piece placed close to the bottom of the reservoir
arranged in the holder, and the delivery side of which has a
¦ discharge nozzle. Using the piston of the suction pump it is
~ I
possible to dose a desired amount of product. The placing of
20 the suction pump close to the bottom of the reservoir ensu-
res almost complete emptying. Under the influence of the
underpressure built up in the reservoir by the dosing, this
will contract whereby the contents are pressed to the low
positioned outlet piece. Furthermore, the product will
25 likewise collect in the bottom of the reservoir due to (the
force of) gravity.
According to a preferred embodiment the suction side of
the pump is placed on the outlet piece by means of a snap
connection. In this way the pump can be quickly coupled and
30 uncoupled. ~o increase operational reliability the suction
side of the pump is further preferably connected to the
outlet piece of the reservoir by means of a bayonet fitting.
2 2~32f~-29
The device is placed at a practical working height
through positioning in a stand. The pump is coupled to the
stand by means of connection means. This construction moreo-
ver provides sufficient support to the device. According to
5 the invention a reservoir of flexible material is arranged
in the holder, which reservoir is provided with an outlet
piece, the passage opening of which is closed by a breakable
membrane, and the wall of the holder has a passage allowing
through the outlet piece. For breaking through the membrane
10 in order to take the reservoir into use, the suction side of
~- the pump is preferably chamfered.
In a preferred embodiment of the invention the discharge
nozzle is embodied in a colour which corresponds, in accor-
' dance with a colour code, with the contents of the reser-
~ 15 voir. In order to make the interior of the pump accessible
'1 for cleaning, the discharge nozzle is connected to the
delivery side through a releasable cap and the cylinder
space is closed off by a releasable cap on the side of the
piston facing the piston rod.
Further details and special features will be elucidated
in the description of the annexed drawings, wherein:
Fig. 1 shows a partially cut away perspective view of
the device according to the invention, placed in the stand;
Fig. 2 shows a view of the device in partial section
25 along line II-II from fig. 1;
Fig. 3 is a partially cut away perspective view of the
~¦ device in disconnected state;
j Fig. 4 shows a partially cut away perspective view of
¦ the device in coupled state; and
Fig. 5 shows a perspective view of a preferred embodi-
ment of the stand in combination with the holder according
to the invention.
;-' Fig. 1 shows an embodiment o~ the invention. Placed in
; the stand 1 is the holder 2 having therein a number of
35 reservoirs of flexible material for the product 3 (also
known as bag-in-box packaging). The size of the reservoirs
can vary. The reservoirs 3 are each coupled to a purp 5 by
'
.
3 20~
means of an outlet piece 4. A preferably metal bracket 6
falls into two slots 7 in order to couple the device to the
stand 1.
Fig. 2 shows a sectional view of the device according to
5 the invention. The pump 5 comprises a cylinder space 8, a
suction side 9 and a delivery side 10. The suction side is
formed by two partly concentric parts 11 and 12 which co-act
with the outlet piece 4 to form a snap connection. The outer
part 11 is provided wi~h a chamfered opening 13 and the
; 10 inner part 12 contains hooks 14 for a bayonet fitting. The
cylinder space 8 is closed off by a releasable cap 15 which
is provided with an opening 16 for passage of the piston rod
17 and a small bleed hole 18. The delivery side is provided
with a releasable cap 19 having therein a spring 20 ~or
15 locking a pressure valve 23. A discharge nozzle 21 is placed
over the cap 19. The discharge noæzle 21 can be embodied in
various colours which correspond with the product in the
reservoir 3 in accordance with a colour code. The diameter
of the spout 22 of the discharge no~zle 21 depends on the
20 viscosity of the product. The pump is furthe~more provided
with a piston 24 which is connected to a handle 25 through
the piston rod 17. In the closed position a spherical sucti-
on valve 26 closes o f f the connecting passage 27 between the
suction side 9 and the cylinder space 8. In the open positi-
25 on the suction valve 26 lies against a locking pin 28. The
~; position of a pressure valve 23 is controlled by the spring
20. In the outward sprung position of spring 20 the pressure
valve 23 closes off the delivery passage 29 between the
cylinder space 8 and the delivery side 9. When the spring is
30 in the compressed position the delivery passage 29 is open.When the piston 24 is moved in the direction of the cap 15
the suction valve 26 is opened by the underpressure in the
cylinder space 8 and the product is sucked via the suction
side 9 into the cylinder space 8. By moving the piston 24 in
35 the opposite direction the suction valve 26 is closed and
the pressure valve 23 opened. The product is hereby pressed
outward through delivery passage 29 via the delivery side
~ 3~
10 .
Fig. 3 shows a partly broken away view of the device
according to the invention in disconnected position. The
suction side of the pump 5 is pushed over the outlet piece
5 4. The chamfered inner part 13 of the suction side breaks
through a membrane 30 closing off the passage opening 31 of
the outlet piece 4. The hooks 14 on the outer part 11 of the
suction side of the pump fall into recesses 32. By means of
a turning movement of the pump the hooks 14 are secured in
10 the recesses 32.
Fig. 4 shows how the reservoir 3 continues to contract
during the pumping of the product until the reservoir 3 is
completely empty. The spout 22a of the discharge nozzle 21a
has a diameter different from the spout 22 of discharge
15 nozzle 21.
Fig. 5 shows a preferred embodiment of the device accor-
ding to the invention. Placed in the stand 1 are two reser-
voirs 3, the discharge nozzles 4 oP which are placed in the
respective openings 33 and 35. For taking into use, an
20 passage 36 is first broken through in the holder 2. Th~
discharge nozzle is pulled outside through the thus created
opening. One holder 2 can also be placed in the stand 1. The
outlet piece 4 hereof falls into opening 34 of the fixing
means 37. The outlet pieces are clamped fixedly by means of
25 a movable bracket 38 which is attached to a fixed brackét 40
by means of a hinge 39. Situated in the holder is a bottom
41 sloping in the direction of the outlet piece.
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