Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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This invention relates to a new hose assembly and to a new
method of making such a hose assembly.
It is known to provide a hose assembly having a flrst fluid
passage therein for conveying a volatile liquid in one direction
to a container, and a second fluid passage therein for returning
the vapours of the volatile liquid from the container, the
assembly comprising a flexible inner hose having an outer
peripheral surface and defining the first fluid passage therein,
and a flexible outer hose having an inner peripheral surface and
being disposed around the inner hose, the inner peripheral
surface of the outer hose and the outer peripheral swrface of the
inner hose defining the second fluid passage therebetween, the
inner hose having a substantially straight Venturi section
therein that tends to remove liquid ~rom a certain area of the
second fluid passage, the inner hose having adjacent intermediate
ends, the Venturi section having opposed ends respectively
interconnected to the ends of the inner hose to provide the first
fluid passage therewith. For example, see prior art FIGS. 14,
15 and 16 of this application, and in Canadian Patent No.
1,297,806.
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Also see the U.S. paten-t to Furrow et al, No.
4,687,033, for another arrangement wherein one end
of an inner hose is telescopically disposed within
one end of a straight Venturi section.
It is one feature of this invention to provide
a new hose assembly wherein the effective length of
the straight portion of the inner hose thereof is
relatively short in order to permit the hose
assembly to provide a desired drape when the hose
assembly is installed on a conventional curbside
gasoline pump or the like for dispensing gaso}ine
therefrom to a gasoline tank of a transportation
vehicle or the like.
Accordingly, it is an ob~ect of this invention
to provide a new hose assembly having fluid
passages therein for respectively conveying a
volatile liquid in one direction to a container and
returning vapors of the volatile liquid from the
; container, the hose assembly of this invention
having one or more of the novel features of this
invention as set Eorth above or hereinafter shown
or descrlbed.
In particular, it was found aacording to the
teachings of this invention that the means Eor
; seauring the substantially straight Venturi section
in the inner hose of the aforementioned hose
- 2 -
131~q5q
assembly of Canadian Patent
No. 1297806,
cr~ates a rela-tively long
effective straight sectlon in the inner hose of the
hose assembly that not only prevents achievin~ a
proper drape of the hose assembly when installed to
a conventional curbsld~ gasollne pUlllp as wiIl be
apparent herelnafter, but also such an arrangement
creates an abrupt transitlon for the fluid at the
inlet and outlet ends of the Ven-tur~ section, which
transition is believed to reduce its efficiency.
Accordingly, it was found according to this
invention that by eliminating -the coupling ~olnts
of -the prior known Venturi arrangement, and by
u-tilizin~ the Venturi body or section itself as the
: :
coupling insert, not only is a smooth transition
~ provided between the inner hose and the Venturi
section, but also a shorter effective length of the
straight section ~of the inner hose results in a
20 : more proper drape of the hos~e assembly when
: installsd~ to a convsntional curbside gasoline pump
ox the like.
For example, one aspec-t of this invention
. ~ provides a hose assembly havlng a first fluid
:~ passage therein for conveyillg a volatile liquld in
one direction to a con-tainer, and a second fluid
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passage -therein for returning the vapors of the
volatile liquid from the container, the assembly
comprising a flexible inner hose having an outer
peripheral surface and defining the first fluid
passage therein, and a flexible outer hose having
an inner psripheral surface and being disposed
around the inner hose, the inner peripheral surface
of the outer hose and the outer peripheral surface
of the inner hose defining the second fluid passage
therebetween, the inner hose having a substantially
straight Venturi section therein that tends to
remove liquid from a certain area of the second
1uid passage, the inner hose having ad~acent
intermediate ends, the Venturi section having
opposed ends respectively interconnected to the
ends of the ~lnner hose to provide the first fluid
passage therewith, the ends of the innex hose being
respectively telescopically disposed on the:opposed
~: : ;: ~ ends of the Venturi section.
:~: 20 : Another obJect of this invention is to provide
;: a new~ method~of maklng suoh a hose assembly, the
: method of this invention having one :or more of the
: novel~:features of this invention as set forth above
or hereinafter shown or described.
:: For example, another aspeot of this invention
~ provides a method of making a hose assembly having
: ~ : :
; ~ :
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a first fluid passage therein for conveying a
volatile liquid in one direction to a container,
and a second fluid passage therein for returning
tha vapors of the volatile liquid from the
container, the assembly comprising a fle~ible inner
hose having an outer peripheral surface and
defining the first fluid passage therein, and a
flexible outer hose having an inner peripheral
surface and being disposed around the inner hose,
the inner peripheral surface of the outer hose and
the outer peripheral surface of the inner hose
defining the second fluid passage therebetween, the
inner hose having a substantially straight Venturi
æection therein that tends to remove liquid from a
certain area of the second fluid passage, the inner
hose having adjacent intermediate ends, the Venturi
section having opposed ands respectively
: interconnected to the ends of the inner hose to
provide the first fluid passage therewith, the ends
: 20 of the inner hose being respectively telescopically
: disposed on the opposed end~ of the Venturi
section. : :
he features of this invention, and its
: ~ technical advantages, can be seen from the
~ following description of preferred embodiments,
~ together with the claims and the accompanylng
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drawings, in which:
FIG. 1 is a side view of the hose assembly of
this invention being utilized for dispensing
gasoline from a conventional curbside gasoline pump
or the like to a nozzle means for insertion in the
gasoline tank of a transportation vehicle or ths
like.
FIG. 2 is an enlarged fragmentary perspactive
view of one end of the hose assembly of this
invention.
FIG. 3 is an exploded perspective view of the
various parts of the end of the hose assembly of
FIG. 2.
FIG. 4 is a perspective view 111ustrating the
parts of FIG. 3 in their assembled rslation.
FIG. 5 is a fragmentary cross-sectional view
taken on line 5-5 of FIG. 4.
;FIG.~ 6 is a fragmentary cross-sectional view
illustrating certaln parts of the hose assembly of
this invention.
:
FIG.~ 7 is a fragmentary perspective view
illustrating the Venturi section of the inner hose
; o~ the hose~assembly of this invention.
FIG. a is: an enlarged fragmentary cross-
sectional view taken on line 8-8 of FIG. 7.
FIG. 9 is a cross-seational view taken on line
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9 9 of FIG. 8.
FIG. 10 is a reduced exploded view of the
parts of the Venturi portlon of the hose assembly
of this inven-tion before the same have been
assembled together.
FIG. 11 is a view similar to FIG. 10 and
illustrates how the parts of the assembly of FIG.
10 are secured together. ~;
FIGS. 12A and l2s~ when placed end-to-end,
provide an enlarged fragmentary cross-sectional
view which illustrates how the inner hose of the
hose assembly of this invention has the Venturi
section thereof arranged in the drape of the hose
assembly at a gasoline pump or the ll)ce.
FIG. 13 iS a fragmentary view similar to FIG.
12A and illustrates the Venturl sectlon in another
oparating posltion thereof ln the hose assembly.
FIG. 14 ls a view slmllar to FIG. l and
illustrates the drape of the prior known hose
assembly as set forth in Canadian Patent
No. 12~7806.
F`IG. 15 is an enlargad fraginentary view,
partlally in cross section, of the Venturi portlon
of the inner hose of the prior known hose assembly
of FIG. 14.
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FIG. 16 is an enlarged fragmentary cross-
sectional view of one end of the Venturi section
and the inner hose of FIG. 15.
FIG. 17 is a cross-sectional view of another
Venturi section of this invention.
FIG. 18 is a view similar to FIG. 17 and
~ illustrates another Venturi section of this
; invention.
FIG. 19 is a view similar to FIG. 17 and
illustrates another Venturi section of this
invention, FIG. 19 illustrating the Venturi section
in one operating position thereof.
FIG. 20 is a view similar to FIG. 19 and
illustrates the Venturi seation in another
operating position thereof.
FIG. 21 ~s a view similar to FIG. 17 and
illustrates another Venturi section of this
nventionO
FIG~. 22 is a view similar to FIG. 17 and
illustrates another Venturi section of thls
invention.
FIG. 23 is a view similar to FIG. 17 and
illustrates another Venturi section of this
invention.
FIG. 24 is an enlarged fragmentary view of the
Venturi section of FIG. 23 and illustrates the same
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in one operating position thereof.
FIG. 25 is a view similar to FIG. 24 and
illustrates the Venturi section in another
operating condition thereof~
While the various features of this invention
are hereinafter illustrated and described as being
particularly adapted to provide a hose assembly for
conveying volatile fluids, it is to be understood
that the various features of this invention can be
utilized singly or in various combinat~ons thereof
to provide a hose assembly for other purposes as
desired.
Therefore, this invention is not to be limited
to only the embodiments illustrated in the
drawings, because the drawings are merely utilized
to illustrate one of the wide variety of uses of
: : : : this invention.
::: : : : :
Referring now to FIG. 1, the new hose assembly
: of this~invention is generally indioated by the
: 20 reerence numeral 30 and is shown in FIG. 1 as
: :having one end 31 thereof interconnecte:d to a
aonventlonal gasoline pump 32 or the lika, and the
:oth:er end~ 33 thereof interconnected to a
: conventional dlspensing nozzle 34 which is shown in
a normal position for dispensing uel into the gas
tank or storage container of a transportation
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vel~icle or tl1e l1ke ( not sl~own ); an inter111ediateportion 35 of tlle hose assembly 30 provides a low
portion or drape thereof from wl~icl~ any collected
liqui~l thereln is to be removed by tlle hose
assembly 30 o tllis invention in a manner
l~ereinafter set fort1l a11d for tl e reasons set forth
in tl1e aEorementioned U. S . patent to Furrow et al
No. 4 687 033
Ihe hose assembly 30 of tl1is invent1on is best
lO illustrated ln FIG. 6 al1d camprises a flexible
inner hose 36 that l~as an outer E~erip1~eral surface
37 and deflnes an inl1er fluid passage 3B therein
through whlch tlle volatlle llquia from t11e pump
neans 32 1.s adapted to be conveyed ln a dlrection
-towar(l the nozzle constructio1~ 34 11l a conventlonal
man1~er.: T}le hose assembly 30 also comprlses a
f:lexible 3uter 11ose 39 tllat l1as an inner perlp}leral
sorEace 40 ~ that cooperates wlth tlle outer
per~ipheral surface 37 of the inl1er hose 36 to
:20 ~ ~efine an outer flu1d passage 41 tl-erebetween and
throug11 whlcl1 vapors of tllé dispensed volatlle
liquid ~ can be returned rom t11e nozzle means 34
back to tlie pump 1neal1s 32 in a. mallllfar convenl~ional
; in -the ar~f sucl) as set fort1~ ln tl1e aforement1oned
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1 3 1 6959
U.S. patent to Furrow et al l~o. 4 687 033 as well
as in another U.S. patent to Furrow et al, No.
4 566 504 and tlle U.S. patent to Bas~lam No.
3, 9~0, 1120
While the inner llose 36 has substantially
smootll inler alld outer peripl~eral surfaces tlle
main body portior 42 of tle outer hose 39 is
corrugated in a helic~l m~nner to deflne
al-ternating crests 43 and valleys 44 on t?e lnner
peril~l eral surEace 40 tllereof as well as
corresponding and a1terl~ati-9 crests ~5 and valleys
46 on the ou~er peri~lleral surface 47 tlereof as
illustrated in FIG. 6 eacl irner crest 43 and each
inner valley 44 defiliing an arcuate surface for a
purpose l~ereillafter described.
In additiol- the outer l~ose 39 has a
relnforclng wire-lilce member 4~ secured ~o tl~e
inner peripheral surface 40 thereof and also being
disposed in~a helical mallner ailong tlle length of
20~ -tlle body portion 42 of tle outer l~ose 39 the wire
reinforcing member 4n being Eonned of any suitable
: Illaterial~ SilCh as metallic mater1al and tl~ereby
rendering tl~e outer l~ose 39 substan~ially resistant
to inward orush1ng tllereof about tl~e inner ~ose 36
,
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1 31 6959
for a purpose hereinafter set forth. However,
because the body portion 42 of the outer hose 39 is
corrugated in the manner previously set forth, the
outer hose 39 is relatively flexible.
While the body portion 42 of the ou-ter hose 39
can be formed of any suitable material, one working
embodiment thereof is formed by -the method of
providing a precurved metallic wire helix 49 (FIG.
12A) with an external urethane coa-ting 50 thereon.
Thereafter, an outer cover 51 of urethane is
extruded over the coated reinforcing member 48,
whereby -the coating 50 thereon enhances the
adhesion of the outer urethane material 51 to the
reinforcing wire 48 while the resulting structure
has the wire 49 effectively embedded therein. Of
course, the body portion 42 of the outer hose 39
~: ~ could be formed of differant material and by a
different method, if desired.
,
In order to attach outer couplings 52 to the
opposed ends of the body portion 42 of the outer
hose~ 39, substantially smooth and nonreinforced
:~ :
; ~ ~oyllndrical cuffs 53 of urethane are respectively
bonded~ or moldèd to the opposed ends 54 of the
outer hose 39 as illustrated in FIGS. 3 and 5, so
that the cuffs 53 can be subsequently secured to
the couplings 52 in any suitable manner, such as
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the manner set forth in the aforementioned U.S.
patent to Basham, No. 3,980,112.
However, before the cuffs 53 are molded on the
ends 54 of the outer hose 39, an end por-tion 55 of
the reinforcing wire 48 at each end 54 of the outer
hose 39 has not only the coating 50 thereon removed
but also the outer cover 51, so that the end
portion 55 of the wire 48 will tend to extend
outwardly beyond the outer peripheral surface 56 of
the subsequently molded cuff 53 in the manner
illustrated in FIG. 3 so as to provide an
electrical conneotion between the opposed end
couplings 52 of the hose assembly 30 for antistatic
purposes.
In particular, each coupling 52 comprises an
outer metal tubular coupling member 57 that is
adapted to be telescoped ovar the respective cuff
53 and to have a plurality of inwardly directed
ribs 58 thereof embedded into the respective cuff
53 when an internally disposed metallic sleeve 59
is outwardly expanded within the:coupling member 57
in the manner illustrated in FIG. 5:to hold the
cuff~ 53 to the ooupling 52. The bared end 55 of
the wire: 48 is maintained in electrical contact
with the internal peripheral surface 60 of the
,
~ metallic coupling member 57 in the manner
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131695q
illustratad in FIG~ 5. In this manner, the wire 48
electrically interconnects the two end couplings 52
for tha hose assembly 30.
Each coupling 52 includes a tubular member 61
that is rotatably disposed thereon between an
annular shoulder 62 of the tubular member 57 and a
split ring retainer 63 as illustrated in FIG. 5.
:The member 61 can have external threads 64 thereof
threaded to internaI threads (not shown) so as to
couple the coupling 52 to either the nozzle
construction 34 or the coupling structure 65 of the
pump 32 in a manner conventional ln the art.
The tubular member 57 of the coupling 52
defines aD internal annular shoulder 66 against
; : which~ a ~clip m~ans 67, FIG. 2, abuts~ so: as to
substsntia11y concentricslly mount an~ end f~itting
68 of the~ inner hose 36 within the respective
coupling 52 in substantially the same~manner as set
forth in the aforementioned U.S. patent to Basham,
No. 3,9B0,112. In this msnnsr, esch end of the
inner hoss~36 i~s supported by the snd clip means 67
in the: couplings ~52 at:the oppoqed ends of the
:: :: : :
outar hoee 39,~whereby the lnner hosa 36 is aarried
: : in the outer hose 39 to complete the hose assembly
30.
; Sinae the coupling 52 and cIip means 67 for
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1 3 1 6q5q
the hose assembly 30 of this invention are fully
disclosed and claimed ln Canadian Patant
No. 1297806,
a fur-ther discussion
thereof is deemed unnecessary o-ther -than to state
that when the hose assembly ~0 is coupled to the
nozzle construction ~ and to the gasoline pump 32
in the manner illustrated in FIG. 1, the fluid
passage 38 in the inner hose 36 is adapted to
direct volatile fuel from -the pump means 32 to the
nozzle 34 to be dispensed therefrom in a
conventional manner, while the second fluid passage
41 defined between the outer hose 39 and the inner
hose~ 36 is adapted to be utilized to return vapors~
from the dispensing operation at the nozzle
construction 34 back to the pump means ~32 for a
vapor recovery purpose tha-t is well known in the
art.
It is also known, as fully described in the
aforementioned U.S. patent to Furrow et al, No.
4,687,033, that liquid in the outer passage 41 of
the hose assembly 30 tends to collect at the low
point or drape area 35 of the hose assembly 30 as
illustrated ~in FIG. 1, and it ls known from others
to include a Venturi section in the lnlier hose 36
so that the same can have its inlet means disposed
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1316~59
in the passage means 41 at the drape area 35 for
sucking the collected liquid from that drape area
35 and direc-ting the same back into the inner fluid
passage 38 of the inner hose 36 so as to be
directed back to the nozzle 34 as the liquid face
flows through the inner passage 38 from the pump
means 32 and passes through the Venturl section to
the nozzle construc-tion 34.
As previously stated, l-t was found, according
to the teachings of this invention, that such an
internal Venturi sec-tion as se-t forth in the
Canadian Patent No. l297806,
resulted
in the effective length of the s-traight portion of
the inner hose of the ilose assembly~ to be
relat~vely long,: so that the drape area thereof
cannot:be bent by a user of the hose assembly 3Q io
properly dlspensing fuel from the pump means 32 to
~that user's gasoline tank.
: 20 : ~ For example, reference is now made to ~IG. 14,
~: whereln the prior known hose assembly ~s generally
: : ~indlcated by the reference numeral 30A, and the
drape~or low area~35A thereof ls shown has havlng a
relatively long straight section therein that is
provided by the effective straight length: of the
Venturi section in the inner hose thereof.
: - 16 -
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In particular, such prior known hose assembly
30A has the inner hose 36A thereof, as illustrated
in FIGS. 15 and 16, provided with a straight
Venturi section 70 that is formed of metallic
material and has a flow passage 71 passing
therethrough and through the opposed ends 72 and 73
thereof. The flow passage 71 has a raduced throat
area 74 which communicates with a plurality of port
means 75 that extend subs-tantially radially
outwardly to communicate with the outer flow
passage in the hose assembly (not shown) to draw
any liquid contained therein into the throat
portion 74 and, thus, into the flow passage 71 for
the reasons previously set forth. Each port:means
75 has a one-way check valve means 76 disposed
therein so as to prevent liquid from flowing from
:
the Venturi section 70 outwardly through the port
means 75.
:~ :The opposed ends 72 and 73 of the Venturi
~ 20 section 70 are respectively interconnected to
::
:adjacent and portions 77 and 78 of the inner hose
:36A by like coupling members:79.~ As lllustrated in
FIG. 16, eaah coupling member 79 has an externally
thr0aded and 80 that threads~ lnto the adjacent
internally threaded end 73 of the Venturi section
: 73 and is~sealed thereto by suitable sealing means
- 17 -
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81. The respective coupling member 79 is in turn
interconnected to its adjacent end 78 of the inner
hose 36A by having that end 78 teleslcoped within a
tubular portion 82 of the coupling member 79 and
being outwardly radially compressed by an expanded
metallic sleeve 84 into annular grooves 83 formed
internally in the tubular portion 82.
However, it was found that such a coupling
arrangement for the Venturi section 70 created a
straight length in the inner hose 36A that was
approximately 14.186 cm (5.585 inches), which
resulted in the substantlally straight unbendable
section 35A in the hose sssembly 30A as illustrated
in FIG. 14.
Accordlngly, it was found according to the
te~achlngs of this lnYention that the adjacent ends
of the inner hose could be telescoped onto adjacent
ends of the Venturi section so as to reduce the
overall effPctive straight length of the Venturi
portion of the inner hose as well as to provide a
smooth transition between the inner hose and the
Vanturi section.
For example, reference is now made to FIGS. 7
and 8 wherein the new Venturi section of this
lnvention~is generally indlcated by the reference
numeral 90 and comprises a substantially
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1 31 6959
cylindrical block of m0tallic material having
opposed ends 91 and 92 through which a ~low passage
93 extends, with the flow passage 93 being uni~uely
arranged in a manner hereinafter set forth.
Each end 91 and 92 of the Venturi section 90
has an end cylindrical portion 94, with the end
cylindrical portion 94 at the end 92 being longer
than the end cylindrical portion 94 at the inlet
end 91 of the Venturi seotion 90 for a purpose
hereinafter described. However, each end 91 and 92
has three annular grooves 95, 96 and 97 formed
therein which respectively define intermediate
outwardly directed annular rib-like portions 98 and
;~ 99 as illustrated. In addition, each end 91 and 92
has an outwardly directed annular flangs 100 that
c~ooperated with an intermedlate enlarged
cylindriaal body portion 101 to def~ne an annular
groove 102 therewith, each~flange 100 extending
outwardly beyond the ribs 98 and 99 as well as
beyond its respective end cylindrical portion 94,
;as illustrated.~ Therefore, it can be seen that the
Venturi section 90 has a sub:tantially circular
cross-sectional configuration ~hroughout the length
thereof, with the diameter thereof varying as
illustrated.
The inner hose 36 has adjacent ends 103 and
~ - 19 -
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~ 3 1 6~59
104 adapted to be respectively telescopically
disposed over the ends 91 and 92 of the Venturi
seation 90 as illustrated, with the respective end
surfaces 105 and 106 of the hose ends 103 and 104
abutting against the respective flanges 100 so as
to limit the degree of insertion o the ends 103
and 104 on the respective ends 91 and 92 of the
Venturi section 90. However, either before or at
the same time that the ends 103 and 104 of the
inner tubular member 36 are being telescoped over
the ends 91 and 92 of the Venturi section 90,
substantially cylindrical me-tal sleeves 107 are
telescoped over the ends 91 and 92 of the Venturi
section 90, as illustrated in FIGS. 10 and 11, with
each sleeve 107 having an initially inwardly turned
annular flange 108 that is of a size that permits
the same to readily slip over its adjacent flange
: 100 and be aligned with its annular groove 102, as
illustrated to the right in FIG. 11; the internal
diameter of the inner hose 36 is substantially the
same as the outer diameter of;the cylindrical part
94 and the ribs 98 and 99 of the respectivs and 91
or 92 of the Venturi section, as illustrated by the
right-hand portion of FIG. 11.
Thereafter, the sleeves 107 are radially
inwardly compressed in any suitable manner, such as
,
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in the manner set forth ln -the U.S~ patent No.
4 625 539
whereby
each radially inwardly compressed sleeve 107
radially inwardly compresses the respective end 103
or 104 of the inner hose 36 lnto the annular
grooves 95 96 and 97 in the manner illustrated in
FIG. 8 and the left-hand portion of FIG. 11 at the
same time that the turned flange 108 of the sleeve
107 is received into tlle annular groove 102 to hold
the collapsed sleeve 107 on the Venturi section 90.
It can be seen in FIG. 8 that t~le outer peripheral
surface of each radially lnwardly compressed sleeve
107 is substantially coplanar with the external
peripheral surface 37 of the inner tubular member
36~as illustrated.
In thls manner it can be seen that the
eEfective overall leng-th of the straight Venturi
portion of the inner hose 36 can be reduced over
the effective straight length of the Venturi
portlon of the prlor known arrangement illus~rated
in FIG. 15 ~ becauss the effective straigh-t length
~: of the Venturi portion illustrated in FIG. 8 ls
~; approximately only 8.826 cm (3.475 inches) whereas
the effeGtive straight length of the Venturi
:::
portion illustrated in FIG. 16 is approximately
- 21 -
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14.186 cm ~5.585 inches).
In this manner, such shortened effective
straight length of the inner hose 36 permits the
inner hose 36 to be disposed with a more curved
draped portion 35 of the hose assembly 30 when the
same is assembled to the pump 32 and nozzle 34 and
the nozzle 34 is being disposed in the dispensing
position illustrated in FIG. 1 and in the manner
illus-trated in FIGS. 12A and 12B.
The enlarged central portion 101 of the
Venturi section 90 has a plurality of radially
disposed port means 110 formed therethrough and
leading to the fluid passage 93 through the Venturi
section 90 at one end thereof and to the exterior
of the Venturi section 90 at the othe:r end thereof
so as to communicate with the fluid passage 41 to
suck any liquid fuel contained therein from the low
portion or drape 35 of the hose assembly 30 as
previously set forth. However, a plurality of one-
way check valve means 111 are disposed in the port
means llO~in enlarged outer :ends 112 thereof, the
check valve means 111 each comprising a tubular
housing means 113 having an internal valve seat 114
therein that is adapted to be opened and closed by
,
a one-way umbrelIa type check ualve member 115
carried~by the~housing means 113.
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Each check valve means 111 includes a
substantially flat disc-like filter member 116 that
defines an inlet for the respective port means 110
so as to filter any fluid flow therethrough which
will be created by the fluid flow through the
passage means 93 from the end 91 thereof to the end
92 thereof in a manner well known in the Venturi
art so that the fluid flow through the inlet 116
opens the umbrella valve member 115 and permits the
liquid to flow through the port means 110 to the
flow passage 93 as previously set forth, and to be
entrained in the fuel flow therethrough.
llhe port means 110 in the Venturi section 90
are disposed in a uniformly spaced apart clrcular
array thereof as illustrated in FIG. 9 so that in
ny position of the Venturi section 90 in the hose
assembly 30, at least one of the port means 110
: ~ will be below the center line of the Venturi block
90 so as to remove liquid from the lower portion of
the drape 35 of the hose assembly 30.
: As set forth in CanadianPatent No. 129780~
the size of
~; the inlets 116 and the size of the internal crests
and valleys 43 and 44 1s such that even though one
: of the port means 110 is pointing directly
- 23 ~
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.. ... . . .
1316q5~
downwardly so as to engage against the internal
peripheral surface 40 of the outer hosa 39 in the
manner illustrated in FIG. 12A or 13, wherein -the
inlet 116 is bridging a valley 44 in FIG. 12A or
engaging against a crest 43 as illustrated in FIG.
13, that inlet 116 is not blocked by the internal
peripheral surface 40 because of the size of the
crests and valleys 43 and 44 and the size of the
particular inlet 116.
In particular, in one working embodiment of
the hose assembly 30 of this invention, the
diameter of the inle-t or filter means 116 is
approximately 0.808 cm (0.318 of an inch), the
maximum diametsr of the Venturi section 90 a-t the
inlets 116 that describes a circle is approximately
2.718 cm (1.070 inches), the inside diameter of the
outer hose 39 at the crests 43 thereof is
approximately 3.175 cm (1.250 inches), the inside
diameter at the valleys thereof is approximately
3.302 cm (1.300 inches), the outside diameter of
the hose 39 at an external crest 45 is
approximately 3.810 cm (1.500 in-hes), the pitch
between ad;acent turns of the wire reinforcing
means 48 is approximately 0.846 cm (0.333 of an
inch), the thickness of the wall covering 51 is
~ .
~: approximately 0.102 cm (0.040 of an inch), the
;~ .
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.
', ~
.
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1316q5q
diameter of the wire means 48 is approximately
0.152 cm (0.060 of an inch) as the wire 49 has a
diameter o approximately 0.127 cm (0.050 of an
inch) and the thickness of the covering 50 on the
wire 49 is approximately 0.013 cm (0.005 of an
inch), the outside diame-ter of the inner hose 36 is
approximately 2.286 cm (0.900 of an inch), and the
inside diameter is approximately 1.588 cm (0.625 of
an inch), with the inner hose 36 being formed of
nitrite rubber that is internally reinforced with a
wire braid or cloth braid, and, as previously set
forth, the leng-th of tha Venturi sectlon 90 is
approximately 8.826 cm (3.475 of an inch).
The flow passage 93 through the Venturi
sec-tion 90 is uniquely arranged so as to define an
intermodlate cylindrical portion 117 tha-t has
opposed ends 118 and 119 with a substantially
uniform circular transverse cross-sectional
,
conflguration throughout the length thereof, the
ports 110 lnterrupting the cylindrlcal portion 117
: : closely adjacent the downstream end 119 thereof as
: illustrated in FIG. 8.
The ~flow passage 93 o the Vanturi section 90
defines an lnlet portion 120 that is substantially
frusto-conlcal,~with its smaller base 121 ~oining
the end:118 of the cylindrical portion 117 and
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,
, :
- : :
-
.
~ ~ \
1 31 6q59
having substantially the same diameter therewith,and with the larger base 122 of the frusto-conical
portion 120 interrupting the end surEace 123 of the
Yenturi section 90 at a point closely adjacant the
internal peripheral surface 124 of the inner hose
36, as illustrated.
An outlet frusto-conical portion 125 is formed
by the passage 93 at the end 92 of the Venturi
section 90, with the frusto-conical portion 125
having a small base 126 and a large base 127, with
the large base 127 interrupting the end surface 128
of the Venturi section 90 so as to be disposed
closely ad~acent the internal peripheral surface
129 of the inner hose 36, as illustrated.
Another frusto-conical portion 130 is formed
by the passage 93 in the Venturi section 90
intermediate the cylindrical portlon 117 thereof
and the outlet frusto-conical portion 125, with the
frusto-conical portion 130 having a smaller base
131 thereof joining the end 119 o the cylindrical
portion 117 and baing substantially of the same
diameter therewith, while tha larger base 132 of
the frusto-conical portion 130 joins the smaller
~; ~ bese 126 of the end frusto-conical portion 125 and
~ has substantially the same diameter therewi-th.
,~ In the previously described working embodiment
~ ~ - 26 -
,~:
.
. -
131695~
of the Venturi section 90 of this invention, tha
section 90 is formed of aluminum, the length of the
cylindrical portion 117 is approximately 1.918 cm
(0.755 of an inch) with a diameter o:E approximately
0.572 cm (0.225 of an inch), the length of the
inlet frusto~conical portion 120 is approximately
2.438 cm (0.960 of an inch) with the larger base
122 thereof having a diameter of approximately
1.524 cm ~0.600 of an inch) so that the angle being
defined by the frusto-conical portion 120 is
approximately 22, the intermediate frusto-conical
portion 130 has a length of approximately 3.607 cm
(1.402 inches) with the laxger base 131 thereof
defining a diameter o~ approximately 1.029 cm
(0.405 of an inch) so that the same makes an angle
of approximately 7, and the outlet frusto-conical
.
:portion 125 has a length of approximately 0.902 cm
(0.355 of an inch) with the larger base 127 thereof
~ :
: having a diameter of approximately 1.524 cm (0.600
20 : of an inch) so that the same defines an angle of
approximately 31.
: It~ was found according to the teachings of
: this invention that the aforementionad working
~:~ embodiment of the Venturi section 90 provided for a
smooth transition of the flow of fuel from the
inlet ~nd 103 of the inner hose 36 through the flow
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1 31 6959
passage 93, and by having the two-stage exit
frusto-coniaal portions 130 and 125, the initial
gradual 7 angle of the first frusto-conical
portion 130 seems to pre~ent flow separation beore
the fluid expands outwardly into the outlet frusto-
conical portion 125 so as to tend to help prevent
"movement" of the low pressure location of the
pressure drop in the cylindrical portion 117 that
performs the sucking function as previously se-t
forth. Also, it has been found that the
cylindrical portion 117 can have an increased
diameter over the diameter of the prior known
Venturi seation (0.572 cm versus 0.554 cm) so as to
reduce pressure drop therethrough which allows for
higher flow rates to the nozzle construction 34 by
~: :
the pump means 32.
Therefore, it can be seen that in the
~: operation of the hose assembly 30 of this
~ ~ invention, whenever an operator dispenses fuel out
; 20 of the nozzle construction 34 into a gasoline tank
or the like, the Venturi section 90 will be located
: in the lowest portion or drape 35 of the hose
assembly 30, and becau~e of the flow of fuel
through the flow passage 93 of the Venturi section
90, a vacuum is created in the port means 110 which
tends to draw any liquid that ls collected in the
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1 31 6~5q
outer passage 41 of the hose assembly 30 in the
drape or low area 35 thereof into the fuel flowing
through the f}ow passage 93 so as to remove the
same from blocking the flow passage 41 which
returns the vapors to the pump means 32 in a manner
aonventional in the art.
In addition, it can be seen that because the
straight portion of the Venturi section 90 is the
only part that requires the inner hose 36 to be
substantially straight in the low area 35 of the
hose assembly 30, the hose assembly 30 can have the
drape or low area 35 thereof relatively arcuate in
contrast to the nonarauate low portion of the prior
known hose assembly arrangement illustrated in FIG.
14.
~:
~; Ther~fore, it can be seen that this invention
not only provides a new hose assembly but also this
invention provides a new method for making suah a
hose assembly.
~ 20 While certain dimensions have been previously
;~ set forth in regards to on~ working embodiment of
the~hose assembly 30 of this invention, it is to be
understood that the dimensions given are merely for
: an example o one working embodiment of this
:
invention,: and it~is not to be a limitation on the
alaims of this invention.
'~ ~
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: :
1316~59
Further, while a certain umbrella type of one-
way check valve has been provided for the port
means 110 of the Venturi section 90 of this
invention, it is to be understood that other
structures can be utilized for blocking flow
through the port means of the Venturi section when
the Venturi section is not providing a sufficient
suction.
For example, reference is now made to FIG. 17
wherein another Venturi section of this invention
is generally indicated by the reference numeral
90B; it can be seen that the port means llOB
; thereof has a duckbill-type of one-way check valve
means 133 disposed therein rather than the umbrella
type of cheak valve means 115 previously described.
: Similarly,:i-t can be seen in FIG. 18 that
another Venturi~section 9OC of this invention has a
: -
one-way spring biased ball valve member 134 urgrd
against a valve seat 135 by a compression spring
136 to provide for the one-way flow through the
:: :: port means llOC.
Instead of a one-way check valve means, the
~:: :: Venturi section can be provided with a slide maans
which wil1 open~rnd closr the port mernr thrreof.
For example, reference is now mad~ to FIGS. 19
~ and 20 whrrein another Venturi section of this
,:
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:
1 31 6959
invention is indioated by the reference numeral 90D
and the same has a port means llOD leading to an
internal peripheral surface 136 thereof. A movable
tubular member 137 is disposed within the Venturi
section 90D and has its external peripheral surface
138D disposed closely adjacent the internal
peripher~l surface 136 and is urged to the left in
FIG. 19 by a compression spring 139. The member
137 has an internal Venturi-forming portion 140
that is interrupted by a portion means 141' which
will align with the port means llOD when the member
136 is moved to the right, as illustrated in FIG.
20, by fluid flowing through the Venturi section
90D from left to right, so that the aligned port
means llOD and 141' can provlde the passage for the
suction created by the Venturi-forming portion 140
in a manner well known in the art, the valve member
137 aarrying 0-ring seal means 141 on opposite
sides of the port 141' thereof so as to seal
20 between the members 90D and 137 when -the port means
141' is aligned with the port means llOD as
illustrated in FIG. 20, while one of~the seal means
:~ :
; : 141 coaperates with another seal means 142 to seal
on opposite sides of the port llOD when the member
137 is disposed in its nonaligned condition
: illustrated in FIG. 19.
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1 3 1 6q59
Another such movable member 143 is provided in
FIGS. 23-25 and is utilized to open and close the
port m~ans llOE of a Venturi section 9OE when the
flow of fuel moves the member 143 against the force
of a compression spring 144 upon flowing from left
to right through the flow passage g3E thereof as
illustrated in FIG. 25, the amount of opening of
ths member 143 away from the port means llOE being
controlled by the amount of fuel flowing through
the Venturi passage 93E.
Of course, in any of the Venturi seations of
this invention, bypass passages ould be providrd
therein to bypass some of the fuel flow through the
Venturi section withou-t utilizing that flow or fuel
for creating~the suction reguired to empty liquid
from the passage of the hose assembly.
For example, the Yenturi section 9OF
.~ :
~ : illustrated in FIG. 21 has: at least one bypass
-: :
openlng 145 passing therethrough so that fuel can
flow through the passage 145 from left to right in
FIG~ 21 without passing through the throat portion
:: : : : :
;;117F of~:the flow passage 93F and thereby permits a
greater amount of fuel to flow through the Venturi
: section 9OF than when the bypass passage 145 is not
being utilized.
If:desired, the flow passage 145 could have s
32:-
~:
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1 31 6q59
one-way check valve means disposed therein, such as
the one-way check valve means 146 illustrated in
FIG. 22.
In any event, it can be seen that various
changes can be made in the structure of the Venturi
section 90 of this invention with the Venturi
section 90 still operating in substantially the
same manner as the Venturi section 90 previously
set forth~
:
: :: : :
~ :: :: : :
:~
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