CA1297806C - Hose assembly and method of making the same - Google Patents
Hose assembly and method of making the sameInfo
- Publication number
- CA1297806C CA1297806C CA000548061A CA548061A CA1297806C CA 1297806 C CA1297806 C CA 1297806C CA 000548061 A CA000548061 A CA 000548061A CA 548061 A CA548061 A CA 548061A CA 1297806 C CA1297806 C CA 1297806C
- Authority
- CA
- Canada
- Prior art keywords
- hose
- fluid passage
- peripheral surface
- assembly
- defining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
- B67D7/0476—Vapour recovery systems
- B67D7/0478—Vapour recovery systems constructional features or components
- B67D7/0488—Means for preventing the formation of condensation on, or for removing condensation from, vapour recovery lines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Joints Allowing Movement (AREA)
- Electric Vacuum Cleaner (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A hose assembly and method of making the same are provided herein. The hose assembly has a first 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 comprises 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 surface of the inner hose defining the second fluid passage therebetween. The inner hose has a Venturi means therein that tends to remove liquid from a certain area of the second fluid passage, the Venturi means having an inlet opening that is generally flat and generally faces the inner peripheral surface so as to be adapted to interconnect the second fluid passage with the first fluid passage through the Venturi means. In the improved configuration the outer hose is cor-rugated in a helical manner so that the inner peripheral surface thereof defines alternating crests and valleys, with each crest and each valley defining an arcuate surface. The arcuate valleys and crests are of such a size that they will not completely block the inlet opening when the inlet opening is engaging the inner surface of the outer hose.
A hose assembly and method of making the same are provided herein. The hose assembly has a first 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 comprises 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 surface of the inner hose defining the second fluid passage therebetween. The inner hose has a Venturi means therein that tends to remove liquid from a certain area of the second fluid passage, the Venturi means having an inlet opening that is generally flat and generally faces the inner peripheral surface so as to be adapted to interconnect the second fluid passage with the first fluid passage through the Venturi means. In the improved configuration the outer hose is cor-rugated in a helical manner so that the inner peripheral surface thereof defines alternating crests and valleys, with each crest and each valley defining an arcuate surface. The arcuate valleys and crests are of such a size that they will not completely block the inlet opening when the inlet opening is engaging the inner surface of the outer hose.
Description
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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 first fluid passage therein for rsspectively conveying a volatile liquid in one direction to a container, and a second fluid passage thereln for returning the vapors of the volatile liquid from the container. The assembly comprises 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 surface o~ the inner hose defining the second fluid passage therebetween, the inner hose having a Venturi means therein that tends to remo~e liquid from a certaln arqa of the second fluid passage.
It is also known to provide wire reInforcing means in a hose construction to tend to prevent inward crushing of that hose construction.
It is also known~to provide an outer hose of a hose assembly that is corrugated in a helical manner so thst the inner periphersl surface means thereof defines alternating crests and valleys with each crest and valley dsfining an arcua-te surface.
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' ~Z978~6 It is also known to provide a hose assembly having fluid passages therein for respectively conveying a volatile liquid in one direction to a container and returning vapours of the volatile liquid from the container, the assembly comprising a flexible inner hose having an outer peripheral surface and defining an inner one of the passages, 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 an outer one of the passages, a coupling fixed to an end portion of the outer hoser a tubular fitting fixed to an end portion of the inner hose, and clip means holding the fitting and the end portion of the inner hose substantialiy concentrically within the coupling and the~outer hose to define a continuation for the outer passage.: For example, see ~0 the U.S. patent to Bas:ham, No. 3,980,112.
It is an object~ of~one aspect of this invention to provide a new hose assembly havlng means to protect the Venturi means of the inner hose~thereof.:~
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It is an ob~ect of another aspect of this invention to provide new means in the hose assembly to tend to remove, as much as possible, the liquid that accumulates in a low portion of the outer passage of the hose assembly.
It is an object of yet another aspect of this invention to provide a new hose assembly having a 1~ unique clip means for holding parts of the hose assembly substantially in concentric relation.
It is an object of still another aspect of this invention to provide a new hose assembly having fluid passages therein for respectively conveying a volatile ~5 liquid in one direction to a container and returning vapours of the volatile liquid from the container, the hose assembly of this aspect of the invention having one or more of the novel features as will be set forth hereinafter.
~0 ~n object of still another aspect of this invention is to provide a new method of making such a hose assembly, the method of this aspect of the invention having one or more of the novel features as will be set forth above hereinafterO
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~L~9~806 By one aspect of this invention an improvement is provided in a hose assembly having a first ~luid 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 surface of the inner hose defining the second fluid passage therebetween, the inner hose having a Venturi means therein that tends to remove liquid from a certain area of the second fluid passage, the Venturi means having an inlet opening that is generally flat and generally faces the inner peripheral 2~ surface so as to be adapted to interconnect the second fluid passage with the first fluid passage through the Venturi means. The improvement comprises an outer hose which is corrugated in a helical manner so that the inner peripheral surface thereof defines alternating crests and valleysj with éach crest and each valley .
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defining an arcuate surface, the arcuate valleys and crests being of such a size that they will not completely block the inlet opening when the ïnlet opening is engaging the inner surface of the outer hose.
In one variant thereof, the Venturi means has a plurality of the inlet openings that radiate outwardly in spaced apart relation about the Venturi means. The outer hose preferably has wire reinforcing means therein to tend to prevent inward crushing of the outer hose in a manner to damage the Venturi means. Prefera-bly, the wire reinforcing means comprises a single wire of metallic material disposed in a helical manner along the axial length of the outer hose.
By another aspect of this invention an improvement is provided in a method of making a hose assembly having a first 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 comprislng a flexlble inner hose having an outer -::
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~ ~LZ9~8~)6 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 Venturi means therein that tends to remove liquid from a certain area of the second fluid passage, the Venturi means having an inlet opening that is generally flat and generally faces the inner peripheral surface so as to be adapted to interconnect the second fluid passage with the first fluid passage through the Venturi means. The improvement in the method includes the steps:of form1ng the outer hose to be corrugated ln a helical manner so that the lnner peripheral surface thereof defines alternating crests ~ and valleys, with each crest and~each valley defining ; 20 an arcuate surface;~and forming the arcuate valleys and crests to be of such a size:that they will not com-- pletely~block the lnlet~opening when the lnlet opening : is engaging the inner surface of the outer hose.
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~29~ 6 In the accompanying drawings, FIG. 1 is a side view of the hose assembly of one aspect 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 the like;
FIG. 2 is an enlarged fragmentary perspective view of one end of the hose assembly of this aspect of this invention;
FIG. 3 is a view similar to FIG. 2 and illustrates the inner hose of the hose assembly pulled outwardly relative to the outer hose thereof;
FIG. 4 is a fragmentary cross-sectional view taken on line 4-4 of FIG. 2;
FIG. 5 is a cro:ss =ectlonal view taken an line 5-5 of FIG. 4;
FIG. 6 is an enlarged fragmentary view, partially in cross-section~ of th= V=nturl~reglon of FIG. l;
~FIG. 7 is a cross-sectional view taken on line 7-7 of FIG. 6;
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FIG. 8 is an enlarged fragmentary view that is partlally ln:cros=-=ectlon of a~part of the assembly of FIG. 6;
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~29~ 6 FIG. 9 is an enlarged fragmentary view of a part of FIG. 6 and illustrates one position of the inlet means of the Venturi means relative to the inner surface of the outer hose; and FIG. 10 is a view similar to FIG. 9 and illustrates another possible position of the inlet means of the Venturi means of the inner hose relative to the inner surface of the outer hose.
Referring now to FIGS. 1 and 2, the new hose assembly of aspects of this invention is generally indicated by the reference numeral 20 and is shown in FIG. 1 as having one end 21 thereof interconnected to a lS conventional gasoline pump 22 or the like, and the other end 23 thereof interconnected to a conventional dispensing nozzle 24 which is shown in a normal position for dispensing fuel into the gas tank or storage ^ontainer of a transportation vehicle or the :;
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like. An intermediate portion 25 of the hose assembly 20 provides a low portion thereof from which any collected liquid therein is to be removed by the hose assembly 20 of an aspect of this invention in a manner hereinafter set forth and for the reasons set forth in the U.S. patent to Furrow et al, No. 4,566,504.
The hose assembly 20 comprises a flexible inner hose 26 having an outer peri.pheral surface 27 and defining an inner passage 28 therein through which the liquid from the pump means 22 is adapted to be conveyed in a direction toward the noz21e 24 in a conventional manner. The hose assembly 20 also comprises a flexible outer hose 29 that has an inner peripheral surface 30, (see FIG. 6~, that cooperates with the outer peripheral surface 27 of the inner hose 26 to def ine an outer passage 31 therebetween through which vapours of the dispensed volatile liquid can be returned from the ~0 nozzle means 24 back to the pump means 22 in a manner conventional in the art, e.g. as set forth in the aforementioned~U,S. patent to Furrow et al, No.
4,566,504, as well as in the aforementioned U.S, Patent to Basham, No. 3,980,112.
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While the inner hose 26 has substantially smooth inner and outer peripheral surfaces, the main body portion 32 of the outer hose 29 of an aspect of this invention is corrugated in a helical manner to define alternating crests 33 and valleys 34 on the inner peripheral surface 30 thereof as well as corresponding and alternating crests 35 and valleys 36 on the outer peripheral surface 37 thereof as illustrated in FIG. 6, with each crest 33 and each valley 34 defining an arcuate surface 33' or 34' ::
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~l~9~ 6 for a purpose her~inafter described.
In addition, ths outer hose 29 has a reinforcing wire-like mamber 38 that is embedd~d therein and is also disposed in a helical manner along the length of the body portion 32 of the hose 29. The wire reinforcing member 38 is formed of any suitable material, such as metallic material, thereby rendering the outer hose 29 substantially resistant to inward crushing thereof about the inner hose 26 for a purpose hereinafter set forth.
However, because the body portion 32 o~ the outer hose 29 is corrugated in the manner prevlously set forth, the outer hose 29 is relatively flexible.
While the body portion 32 of the outer hose 29 can be formed of any suitable material, one working embodiment thereof comprises a precurved wire helix with an external urethane coating extruded thereon.
Thereafter, an outer cover of urethane is extruded over the coated wirs whereby the thus coated wire helps the preforming of the wire and enhances the adhesion of the outer urethane material to the reinforcing wire while the resulting structure has the wire 38 effectively embedded thereon. Of course, the body portion 32 of the outer hose 29 could be formed of different materials and by a different method, if desired.
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In order to attach outer couplings 39 to the opposed ends of the body portion 32 o~ the outer hose 29, substantially smooth and non-rein~orced cylindrical cuffs 40 of urethane are respectively bonded or molded to the opposed ends of the outsr hose 29 so that the cuffs 43 can be secured to the couplings 39 in any suitable manner, such as in the manner set forth in the aforementioned U.S. patent to Basham, No. 3,980,112.
However, as illustrated in FIG. 4, it can be seen that the end portion 40 of the outer hose 2g is inserted into the coupling 39 and an internal metallic sleeve 39' is radially outwardly expanded to compress the end portion 40 against the internal peripheral surface 39" of the coupling 39 and also to hold the end portion in deformed relation into annuIar grooves of the coupling 39.
It is also to be understood that the outer hose 29 could be formed from other than the aforementioned plastic materlals and thereby can comprise any suitable polymerlc material that is reslstant to gasoline, oil, etc.
For example, another working embodiment of the outer hose 29 of this invention was not corrugated but had a hellcally disposed: wire reinforcing member embedded therein with the same being formed .
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., ~2~78~6 from an inner tube of nitrile rubber having a rayon braid laid on the same and then a jacket o~ nitrile rubber disposed on top of the rayon braid. The wire reinforcing helix was disposed on the jacket and then another rayon braid was disposed over the same. An outer cover was disposed on top of the outer rayon braid and comprised a compound of nitrile rubber and PVC with the resulting outer hose being relatively smooth on the inner and outer peripheral surfaces thereof. The ends of such outer hose were joined to couplings similar to couplings 39.
The inner hose 26 of the hose assembly 20 of this invention can also be formed of any suitable polymeric material, and in one working embodiment thereof comprises a tube of nitrile rubber that is wire reinforced and has a cover of a compound comprising nitrile rubber and PVC.
As illustrated ln FIGS. 3 and 4, each opposed end portion 41 of the inner hose 26 is attached to a metallic fitting 42 substantlally in the same manner set forth above in regard to the coupling 39, or as in the aforementioned patent to Basham, No. 3,980,112, and the interconnected fitting 42 is held in substantially concentric relation within lts cooperating coupling 39 by a clip means of this : i ~Z~8~6 invention that is generally indicated by the reference numeral 43.
The clip means 43 is formed from any suitable material, such as extruded aluminum, and has a ring-like portion 44 that is adapted to be telescopically disposed on a cylindrical portion 45 of the fitting 42 and to be held against a shoulder 46 thereof by a C-ring 47 received in an annular groove 48 in the fitting 42. The clip means 43 includes a plurality of integral arms or legs 49 extending radially outwardly from the ring portion 44 and in spaced apart relation so that the end surfaces 50 of the arms 49 are adapted to engage against an internal peripheral surface 51 of the coupling 39 to maintain the concentric relationship illustrated in FIG. 4.
In addition, the arms 49 of the clip means 43 are adapted to abut against an internal shoulder 52 of the coupling 39 to positively conneat the inner and outer hoses 26 and 29 together.
In particular, with the 1nner hose 29 having one end thereof fi~ed to the pump 22 by its coupling 39 and ~itting 42, a person pulling on the outer hose 29 toward the nozzle 24 causes the coupling 39 ad;acent the nozzle 24 to have its shoulder 52 engage against the arms 49 of the c11p "' ~2~780~
means 43 and thereby not be movable relative to -the inner hose 26 as the clip means 43 is fastened to the inner hose 26 at the fitting 42 thereof as previously set forth.
Therefore, by utilizing the interlocking feature of the clip means 43 as previously described, the outer hose 29 can be formed of the aforementioned lightweight plastic material.
Also, it can be seem that the spacing 53 between the arms 49 of the clip means 43 as illustrated in FIG. 5 provides a continuation of . the outer passage 31 o the hose assembly 20 for conveying vapors therethrough for the purpose fully set forth in the aforementioned patent to Baqham, No. 3,980,112.
As ful1y described in the aforementioned U.S.
patent to Furrow et al, No. 4,56:6,504, 11quid in the outer passage 31 of the hose assembly 20 tends to collect at the low point or area 25 as illustrated in FIG. l. It is known from others to include a Venturi means in ~the lnner hose 26 so that the ~ame can have its inlet means disposed in :: ::
the passage~means 31 at the area 25 or sucking the li~uid from: that area 25 back into the inner passage 28 and, thus,~ to the nozzle 24 as the li~uid flows through the inner passage 28 from the : - 15 -~
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~ , , ~2g78~i pump 22 and passes through the Venturi means to the nozzle 24.
Such Venturi means is generally indicated by the reerence numeral 54 in FIG. 6 and comprises a tubular metallic member 55 having opposed ends 56 and 57 respactively coupled to ad~acent end portions 58 and 59 of the inner hose 26 by coupling members 60 of this invention.
In particular, it can readily be seen in FIG.
8 that each coupling member 60 is interconnected to its respective end portion 58 or 59 of the inner hose 26 by an internally disposed metallic sleeve 61 that is internally expanded in the end portion 58 or 59 to trap the end portion 58 or 59 against the internal perlpheral surface 62 of the coupling 60 as well as into the annular grooves 62' thereof as illustrated.
Each coupling 60, in turn, has an externally threaded projeation 63 which is adapted to be threaded into the internally threaded end 56 or 57 of the Venturi tube 55 and to be sealed against the same by an 0-ring seal means 6~ and/or by a suitable sealant disposed between the interconnected threads. In this manner the ad~acent ends 58 and 59 of the inner hose 26 are respectively interconnected to a Venturi passage :
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'78iDl~j means 65 that passes through the tubular member 55 and functions in a manner conventional in the Venturi art for drawing fluid through an inlet 66 thereof that leads from the external peripheral surface 67 of the tubular member 55 to the Venturi passage 65 thereof.
For example, the inle-t 65 can comprise three such equally spaced apart passages 66 radiating about the tubular member 55 and each having a porous filtering member 66' therein containing a one-way check valve means therein (not shown) and extending outwardly from the external peripheral surface 67 of the tubular member 55 to define a substantially flat inlet means 69 that is in communication with the outer passage 31 of the hose assembly 20.
While the Venturi tubs 55 and couplings 60 can be formed of any suitable material, one working embodi=ent thereof has the Venturi tube formed of brass and the couplings 60 formed of aluminum.
It is believed that by forming the internal peripheral surface 30 of the outer hoee 29 with the alternating crests 33 and valleys 34 each having an arcuate surface 33' or 34', the hottom inlet means 69 of the Venturi means 54 can be disposed ad~acent the same as illustrated respectively in FIGS. 9 and ~ - 17 -.
, ' .:' lO. It can be seen that the substantially flat inlet means 69 is not completely blocked by such crests 33 or valleys 34 so tha-t the majority of the liquid that collects in the low point 25 of the passage 31 of the hose assembly 20 will be far more readily removed therefrom by the Venturi means 54 than would be the case where the lowest inlet means thereof is complately blocked by engaging against a non-corrugated internal peripheral surface of the outer hoseO
Thus, it can be seen that in the operation of the hose assembly 20 of this invention, the lnner passage 28 thereof is adapted to permit a flow of fuel from the pump 20 out through the nozzle 24 in a conventional manner, and as a flow of fual passes through the lnner passage 28, the flow of fuel causes the Venturi means 54 to act as a pump and thereby draw, by suction, any liquid that collects in the outer passage 31 in the low area 25 thereof into that flowing~ stream:of:fuel through the inner passage 28 to tend to remove the samé from bloc~ing the outer passage 31, which is utilized for returning vapors:from the nozzle 24 back to the pump means 22 ln the~manner fully set forth in the aforementioned U.S. patents to Furrow et al, No.
: 4,566,504, and to Basham, No. 3,980,112.
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From the above, it can be seen that the hose assembly 20 of this invention is relatively lightweight and flexible while still being adapted to withstand the constant abuse that is normally provided at filling stations and the like, such as the constant flexing, abrasion, pulling etc., that is associated with any curb pump hose arrangement.
In addition, the outer hose 29 of the hose assembly 20 of this invention providas sufficient support through the wire reinforcing means 38 thereof to protect ths Venturi means 54 of the inner hose 26 that is utilized in the vapor recovery operation as previously described.
The inner hose 26 of the hose assembly 20 of this invention is adapted to handle end forces that result from excessive pulling on the hose assembly 20 because the inner hose 26 utilizes a wire braid reinforcing construction.
The outer ho~e 29 1s lightweight and flexible while still being rigid enough to protect the Venturi means 54 because the same is corrugated for flexibility, has the wire reinforcement means 38 for protection, and is formed of urethane to provide the light weighi thereof.
The spider-like clip maans 43 ~ this invention which ho~ld the aouplings 39 and the :
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~Z9~6 fittings 42 at each end of the hose assembly 20 in concentric relation also transfer any end pull forces on the outer hose 2g to the inner hose 26 and thereby permits the use of a lightweight and flexible outer hose 29.
Also, it can be seen that the attaching of the outer hose 29 to the non-reinforced cuffs 40, each of which has smooth inner and outer peripheral surfaces, allows for internal expansion of a sleeve 39' in each coupling 39 to improve the vapor flow therethrough, each expanded length 39' also acting as a strain reliever that minimizes bends on both the inner and outer hoses 26 and 29. Also, a clip (not shown) can be attached to the ~ire reinforcement 38 throu~h the cuff 40 and can be attached to the outer coupling 39 so as to act as a static ground.
In addition, lt can be seen that othsr polymeric structures can be molded or bonded to the outer hose 29 of the hose assembly in the same manner as the cuffs 40. For example, a suitable member 40', FIG. 1, can be molded or bonded to an intermeqiate part o~ the outer hose 29 and can provide a means for attaching a conventional sprlng loaded reel-in line (not shown) from the pump means 22 to the hose assembly 20. 0~ course, such member - 20 - ~
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~: ' 40' could be formed of other material and can merely be fastened to the outer hose 29 by fastening means other than by molding or bonding, as desired.
In regard to the inner hose 26, the couplings are attached to the inner hose 26 by the internally expanded sleeves 61 to allow for maximum flow through the inner hose 26, and the 0-ring seal and/or thread sealant design of the couplings 60 permits the c~uplings 60 to mate with the threads of the Venturi tube 55 so that 0-rings 64 and/or thread sealant provide excellent seals between the coupling members 60 and the Venturi tube 55. Also, the screw threads 63 on the Venturi tube 55 and couplin~ members 60 provide good pull strength for the entire assembly 20.
Thus, it can be seen that this invention also provides a new method of making such a hose assembly.
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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 first fluid passage therein for rsspectively conveying a volatile liquid in one direction to a container, and a second fluid passage thereln for returning the vapors of the volatile liquid from the container. The assembly comprises 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 surface o~ the inner hose defining the second fluid passage therebetween, the inner hose having a Venturi means therein that tends to remo~e liquid from a certaln arqa of the second fluid passage.
It is also known to provide wire reInforcing means in a hose construction to tend to prevent inward crushing of that hose construction.
It is also known~to provide an outer hose of a hose assembly that is corrugated in a helical manner so thst the inner periphersl surface means thereof defines alternating crests and valleys with each crest and valley dsfining an arcua-te surface.
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' ~Z978~6 It is also known to provide a hose assembly having fluid passages therein for respectively conveying a volatile liquid in one direction to a container and returning vapours of the volatile liquid from the container, the assembly comprising a flexible inner hose having an outer peripheral surface and defining an inner one of the passages, 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 an outer one of the passages, a coupling fixed to an end portion of the outer hoser a tubular fitting fixed to an end portion of the inner hose, and clip means holding the fitting and the end portion of the inner hose substantialiy concentrically within the coupling and the~outer hose to define a continuation for the outer passage.: For example, see ~0 the U.S. patent to Bas:ham, No. 3,980,112.
It is an object~ of~one aspect of this invention to provide a new hose assembly havlng means to protect the Venturi means of the inner hose~thereof.:~
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It is an ob~ect of another aspect of this invention to provide new means in the hose assembly to tend to remove, as much as possible, the liquid that accumulates in a low portion of the outer passage of the hose assembly.
It is an object of yet another aspect of this invention to provide a new hose assembly having a 1~ unique clip means for holding parts of the hose assembly substantially in concentric relation.
It is an object of still another aspect of this invention to provide a new hose assembly having fluid passages therein for respectively conveying a volatile ~5 liquid in one direction to a container and returning vapours of the volatile liquid from the container, the hose assembly of this aspect of the invention having one or more of the novel features as will be set forth hereinafter.
~0 ~n object of still another aspect of this invention is to provide a new method of making such a hose assembly, the method of this aspect of the invention having one or more of the novel features as will be set forth above hereinafterO
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~L~9~806 By one aspect of this invention an improvement is provided in a hose assembly having a first ~luid 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 surface of the inner hose defining the second fluid passage therebetween, the inner hose having a Venturi means therein that tends to remove liquid from a certain area of the second fluid passage, the Venturi means having an inlet opening that is generally flat and generally faces the inner peripheral 2~ surface so as to be adapted to interconnect the second fluid passage with the first fluid passage through the Venturi means. The improvement comprises an outer hose which is corrugated in a helical manner so that the inner peripheral surface thereof defines alternating crests and valleysj with éach crest and each valley .
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defining an arcuate surface, the arcuate valleys and crests being of such a size that they will not completely block the inlet opening when the ïnlet opening is engaging the inner surface of the outer hose.
In one variant thereof, the Venturi means has a plurality of the inlet openings that radiate outwardly in spaced apart relation about the Venturi means. The outer hose preferably has wire reinforcing means therein to tend to prevent inward crushing of the outer hose in a manner to damage the Venturi means. Prefera-bly, the wire reinforcing means comprises a single wire of metallic material disposed in a helical manner along the axial length of the outer hose.
By another aspect of this invention an improvement is provided in a method of making a hose assembly having a first 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 comprislng a flexlble inner hose having an outer -::
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~ ~LZ9~8~)6 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 Venturi means therein that tends to remove liquid from a certain area of the second fluid passage, the Venturi means having an inlet opening that is generally flat and generally faces the inner peripheral surface so as to be adapted to interconnect the second fluid passage with the first fluid passage through the Venturi means. The improvement in the method includes the steps:of form1ng the outer hose to be corrugated ln a helical manner so that the lnner peripheral surface thereof defines alternating crests ~ and valleys, with each crest and~each valley defining ; 20 an arcuate surface;~and forming the arcuate valleys and crests to be of such a size:that they will not com-- pletely~block the lnlet~opening when the lnlet opening : is engaging the inner surface of the outer hose.
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~29~ 6 In the accompanying drawings, FIG. 1 is a side view of the hose assembly of one aspect 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 the like;
FIG. 2 is an enlarged fragmentary perspective view of one end of the hose assembly of this aspect of this invention;
FIG. 3 is a view similar to FIG. 2 and illustrates the inner hose of the hose assembly pulled outwardly relative to the outer hose thereof;
FIG. 4 is a fragmentary cross-sectional view taken on line 4-4 of FIG. 2;
FIG. 5 is a cro:ss =ectlonal view taken an line 5-5 of FIG. 4;
FIG. 6 is an enlarged fragmentary view, partially in cross-section~ of th= V=nturl~reglon of FIG. l;
~FIG. 7 is a cross-sectional view taken on line 7-7 of FIG. 6;
:
FIG. 8 is an enlarged fragmentary view that is partlally ln:cros=-=ectlon of a~part of the assembly of FIG. 6;
:~ :
:
~29~ 6 FIG. 9 is an enlarged fragmentary view of a part of FIG. 6 and illustrates one position of the inlet means of the Venturi means relative to the inner surface of the outer hose; and FIG. 10 is a view similar to FIG. 9 and illustrates another possible position of the inlet means of the Venturi means of the inner hose relative to the inner surface of the outer hose.
Referring now to FIGS. 1 and 2, the new hose assembly of aspects of this invention is generally indicated by the reference numeral 20 and is shown in FIG. 1 as having one end 21 thereof interconnected to a lS conventional gasoline pump 22 or the like, and the other end 23 thereof interconnected to a conventional dispensing nozzle 24 which is shown in a normal position for dispensing fuel into the gas tank or storage ^ontainer of a transportation vehicle or the :;
, , , -:: : : :
~29~
like. An intermediate portion 25 of the hose assembly 20 provides a low portion thereof from which any collected liquid therein is to be removed by the hose assembly 20 of an aspect of this invention in a manner hereinafter set forth and for the reasons set forth in the U.S. patent to Furrow et al, No. 4,566,504.
The hose assembly 20 comprises a flexible inner hose 26 having an outer peri.pheral surface 27 and defining an inner passage 28 therein through which the liquid from the pump means 22 is adapted to be conveyed in a direction toward the noz21e 24 in a conventional manner. The hose assembly 20 also comprises a flexible outer hose 29 that has an inner peripheral surface 30, (see FIG. 6~, that cooperates with the outer peripheral surface 27 of the inner hose 26 to def ine an outer passage 31 therebetween through which vapours of the dispensed volatile liquid can be returned from the ~0 nozzle means 24 back to the pump means 22 in a manner conventional in the art, e.g. as set forth in the aforementioned~U,S. patent to Furrow et al, No.
4,566,504, as well as in the aforementioned U.S, Patent to Basham, No. 3,980,112.
~ :
;
::: :
, ~2~8~
While the inner hose 26 has substantially smooth inner and outer peripheral surfaces, the main body portion 32 of the outer hose 29 of an aspect of this invention is corrugated in a helical manner to define alternating crests 33 and valleys 34 on the inner peripheral surface 30 thereof as well as corresponding and alternating crests 35 and valleys 36 on the outer peripheral surface 37 thereof as illustrated in FIG. 6, with each crest 33 and each valley 34 defining an arcuate surface 33' or 34' ::
::
`
:
... ., . ~ ~
: :::: : :
;
:
': ' :
~l~9~ 6 for a purpose her~inafter described.
In addition, ths outer hose 29 has a reinforcing wire-like mamber 38 that is embedd~d therein and is also disposed in a helical manner along the length of the body portion 32 of the hose 29. The wire reinforcing member 38 is formed of any suitable material, such as metallic material, thereby rendering the outer hose 29 substantially resistant to inward crushing thereof about the inner hose 26 for a purpose hereinafter set forth.
However, because the body portion 32 o~ the outer hose 29 is corrugated in the manner prevlously set forth, the outer hose 29 is relatively flexible.
While the body portion 32 of the outer hose 29 can be formed of any suitable material, one working embodiment thereof comprises a precurved wire helix with an external urethane coating extruded thereon.
Thereafter, an outer cover of urethane is extruded over the coated wirs whereby the thus coated wire helps the preforming of the wire and enhances the adhesion of the outer urethane material to the reinforcing wire while the resulting structure has the wire 38 effectively embedded thereon. Of course, the body portion 32 of the outer hose 29 could be formed of different materials and by a different method, if desired.
' :
~2~7~
In order to attach outer couplings 39 to the opposed ends of the body portion 32 o~ the outer hose 29, substantially smooth and non-rein~orced cylindrical cuffs 40 of urethane are respectively bonded or molded to the opposed ends of the outsr hose 29 so that the cuffs 43 can be secured to the couplings 39 in any suitable manner, such as in the manner set forth in the aforementioned U.S. patent to Basham, No. 3,980,112.
However, as illustrated in FIG. 4, it can be seen that the end portion 40 of the outer hose 2g is inserted into the coupling 39 and an internal metallic sleeve 39' is radially outwardly expanded to compress the end portion 40 against the internal peripheral surface 39" of the coupling 39 and also to hold the end portion in deformed relation into annuIar grooves of the coupling 39.
It is also to be understood that the outer hose 29 could be formed from other than the aforementioned plastic materlals and thereby can comprise any suitable polymerlc material that is reslstant to gasoline, oil, etc.
For example, another working embodiment of the outer hose 29 of this invention was not corrugated but had a hellcally disposed: wire reinforcing member embedded therein with the same being formed .
.
., ~2~78~6 from an inner tube of nitrile rubber having a rayon braid laid on the same and then a jacket o~ nitrile rubber disposed on top of the rayon braid. The wire reinforcing helix was disposed on the jacket and then another rayon braid was disposed over the same. An outer cover was disposed on top of the outer rayon braid and comprised a compound of nitrile rubber and PVC with the resulting outer hose being relatively smooth on the inner and outer peripheral surfaces thereof. The ends of such outer hose were joined to couplings similar to couplings 39.
The inner hose 26 of the hose assembly 20 of this invention can also be formed of any suitable polymeric material, and in one working embodiment thereof comprises a tube of nitrile rubber that is wire reinforced and has a cover of a compound comprising nitrile rubber and PVC.
As illustrated ln FIGS. 3 and 4, each opposed end portion 41 of the inner hose 26 is attached to a metallic fitting 42 substantlally in the same manner set forth above in regard to the coupling 39, or as in the aforementioned patent to Basham, No. 3,980,112, and the interconnected fitting 42 is held in substantially concentric relation within lts cooperating coupling 39 by a clip means of this : i ~Z~8~6 invention that is generally indicated by the reference numeral 43.
The clip means 43 is formed from any suitable material, such as extruded aluminum, and has a ring-like portion 44 that is adapted to be telescopically disposed on a cylindrical portion 45 of the fitting 42 and to be held against a shoulder 46 thereof by a C-ring 47 received in an annular groove 48 in the fitting 42. The clip means 43 includes a plurality of integral arms or legs 49 extending radially outwardly from the ring portion 44 and in spaced apart relation so that the end surfaces 50 of the arms 49 are adapted to engage against an internal peripheral surface 51 of the coupling 39 to maintain the concentric relationship illustrated in FIG. 4.
In addition, the arms 49 of the clip means 43 are adapted to abut against an internal shoulder 52 of the coupling 39 to positively conneat the inner and outer hoses 26 and 29 together.
In particular, with the 1nner hose 29 having one end thereof fi~ed to the pump 22 by its coupling 39 and ~itting 42, a person pulling on the outer hose 29 toward the nozzle 24 causes the coupling 39 ad;acent the nozzle 24 to have its shoulder 52 engage against the arms 49 of the c11p "' ~2~780~
means 43 and thereby not be movable relative to -the inner hose 26 as the clip means 43 is fastened to the inner hose 26 at the fitting 42 thereof as previously set forth.
Therefore, by utilizing the interlocking feature of the clip means 43 as previously described, the outer hose 29 can be formed of the aforementioned lightweight plastic material.
Also, it can be seem that the spacing 53 between the arms 49 of the clip means 43 as illustrated in FIG. 5 provides a continuation of . the outer passage 31 o the hose assembly 20 for conveying vapors therethrough for the purpose fully set forth in the aforementioned patent to Baqham, No. 3,980,112.
As ful1y described in the aforementioned U.S.
patent to Furrow et al, No. 4,56:6,504, 11quid in the outer passage 31 of the hose assembly 20 tends to collect at the low point or area 25 as illustrated in FIG. l. It is known from others to include a Venturi means in ~the lnner hose 26 so that the ~ame can have its inlet means disposed in :: ::
the passage~means 31 at the area 25 or sucking the li~uid from: that area 25 back into the inner passage 28 and, thus,~ to the nozzle 24 as the li~uid flows through the inner passage 28 from the : - 15 -~
:: :
: : .
:~ ; - . . ~.
~ , , ~2g78~i pump 22 and passes through the Venturi means to the nozzle 24.
Such Venturi means is generally indicated by the reerence numeral 54 in FIG. 6 and comprises a tubular metallic member 55 having opposed ends 56 and 57 respactively coupled to ad~acent end portions 58 and 59 of the inner hose 26 by coupling members 60 of this invention.
In particular, it can readily be seen in FIG.
8 that each coupling member 60 is interconnected to its respective end portion 58 or 59 of the inner hose 26 by an internally disposed metallic sleeve 61 that is internally expanded in the end portion 58 or 59 to trap the end portion 58 or 59 against the internal perlpheral surface 62 of the coupling 60 as well as into the annular grooves 62' thereof as illustrated.
Each coupling 60, in turn, has an externally threaded projeation 63 which is adapted to be threaded into the internally threaded end 56 or 57 of the Venturi tube 55 and to be sealed against the same by an 0-ring seal means 6~ and/or by a suitable sealant disposed between the interconnected threads. In this manner the ad~acent ends 58 and 59 of the inner hose 26 are respectively interconnected to a Venturi passage :
~.
:: , . . ~ .
, . , . .. ~
.
'78iDl~j means 65 that passes through the tubular member 55 and functions in a manner conventional in the Venturi art for drawing fluid through an inlet 66 thereof that leads from the external peripheral surface 67 of the tubular member 55 to the Venturi passage 65 thereof.
For example, the inle-t 65 can comprise three such equally spaced apart passages 66 radiating about the tubular member 55 and each having a porous filtering member 66' therein containing a one-way check valve means therein (not shown) and extending outwardly from the external peripheral surface 67 of the tubular member 55 to define a substantially flat inlet means 69 that is in communication with the outer passage 31 of the hose assembly 20.
While the Venturi tubs 55 and couplings 60 can be formed of any suitable material, one working embodi=ent thereof has the Venturi tube formed of brass and the couplings 60 formed of aluminum.
It is believed that by forming the internal peripheral surface 30 of the outer hoee 29 with the alternating crests 33 and valleys 34 each having an arcuate surface 33' or 34', the hottom inlet means 69 of the Venturi means 54 can be disposed ad~acent the same as illustrated respectively in FIGS. 9 and ~ - 17 -.
, ' .:' lO. It can be seen that the substantially flat inlet means 69 is not completely blocked by such crests 33 or valleys 34 so tha-t the majority of the liquid that collects in the low point 25 of the passage 31 of the hose assembly 20 will be far more readily removed therefrom by the Venturi means 54 than would be the case where the lowest inlet means thereof is complately blocked by engaging against a non-corrugated internal peripheral surface of the outer hoseO
Thus, it can be seen that in the operation of the hose assembly 20 of this invention, the lnner passage 28 thereof is adapted to permit a flow of fuel from the pump 20 out through the nozzle 24 in a conventional manner, and as a flow of fual passes through the lnner passage 28, the flow of fuel causes the Venturi means 54 to act as a pump and thereby draw, by suction, any liquid that collects in the outer passage 31 in the low area 25 thereof into that flowing~ stream:of:fuel through the inner passage 28 to tend to remove the samé from bloc~ing the outer passage 31, which is utilized for returning vapors:from the nozzle 24 back to the pump means 22 ln the~manner fully set forth in the aforementioned U.S. patents to Furrow et al, No.
: 4,566,504, and to Basham, No. 3,980,112.
~- 18 -, : ~ :
, ': ~ ' : ' ' .
.
~9'7~
From the above, it can be seen that the hose assembly 20 of this invention is relatively lightweight and flexible while still being adapted to withstand the constant abuse that is normally provided at filling stations and the like, such as the constant flexing, abrasion, pulling etc., that is associated with any curb pump hose arrangement.
In addition, the outer hose 29 of the hose assembly 20 of this invention providas sufficient support through the wire reinforcing means 38 thereof to protect ths Venturi means 54 of the inner hose 26 that is utilized in the vapor recovery operation as previously described.
The inner hose 26 of the hose assembly 20 of this invention is adapted to handle end forces that result from excessive pulling on the hose assembly 20 because the inner hose 26 utilizes a wire braid reinforcing construction.
The outer ho~e 29 1s lightweight and flexible while still being rigid enough to protect the Venturi means 54 because the same is corrugated for flexibility, has the wire reinforcement means 38 for protection, and is formed of urethane to provide the light weighi thereof.
The spider-like clip maans 43 ~ this invention which ho~ld the aouplings 39 and the :
. .
:
: ~
- : '` :
`' .
~Z9~6 fittings 42 at each end of the hose assembly 20 in concentric relation also transfer any end pull forces on the outer hose 2g to the inner hose 26 and thereby permits the use of a lightweight and flexible outer hose 29.
Also, it can be seen that the attaching of the outer hose 29 to the non-reinforced cuffs 40, each of which has smooth inner and outer peripheral surfaces, allows for internal expansion of a sleeve 39' in each coupling 39 to improve the vapor flow therethrough, each expanded length 39' also acting as a strain reliever that minimizes bends on both the inner and outer hoses 26 and 29. Also, a clip (not shown) can be attached to the ~ire reinforcement 38 throu~h the cuff 40 and can be attached to the outer coupling 39 so as to act as a static ground.
In addition, lt can be seen that othsr polymeric structures can be molded or bonded to the outer hose 29 of the hose assembly in the same manner as the cuffs 40. For example, a suitable member 40', FIG. 1, can be molded or bonded to an intermeqiate part o~ the outer hose 29 and can provide a means for attaching a conventional sprlng loaded reel-in line (not shown) from the pump means 22 to the hose assembly 20. 0~ course, such member - 20 - ~
.
~ , , .
.
.
~: ' 40' could be formed of other material and can merely be fastened to the outer hose 29 by fastening means other than by molding or bonding, as desired.
In regard to the inner hose 26, the couplings are attached to the inner hose 26 by the internally expanded sleeves 61 to allow for maximum flow through the inner hose 26, and the 0-ring seal and/or thread sealant design of the couplings 60 permits the c~uplings 60 to mate with the threads of the Venturi tube 55 so that 0-rings 64 and/or thread sealant provide excellent seals between the coupling members 60 and the Venturi tube 55. Also, the screw threads 63 on the Venturi tube 55 and couplin~ members 60 provide good pull strength for the entire assembly 20.
Thus, it can be seen that this invention also provides a new method of making such a hose assembly.
- 21~-,. : ~ ~ : , ,, :
.. ~
.: .
' : .
. .
Claims (5)
1. In a hose assembly having a first 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 said first fluid passage therein, and a flexible outer hose having an inner peripheral surface and being disposed around said inner hose, said inner peripheral surface of said outer hose and said outer peripheral surface of said inner hose defining said second fluid passage therebetween, said inner hose having a Venturi means therein that tends to remove liquid from a certain area of said second fluid passage, said Venturi means having an inlet opening that is generally flat and generally faces said inner peripheral surface so as to be adapted to interconnect said second fluid passage with said first fluid passage through said Venturi means; the improvement characterized in that said outer hose is corrugated in a helical manner so that said inner peripheral surface thereof defines alternating crests and valleys, with each crest and each valley defining an arcuate surface, said arcuate valleys and crests being of such a size that they will not completely block said inlet opening when said inlet opening is engaging said inner surface of said outer hose.
2. A hose assembly as set forth in claim 1, wherein said Venturi means has a plurality of said inlet openings that radiate outwardly in spaced apart relation about said Venturi means.
3. A hose assembly as set forth in claim 1, wherein said outer hose has wire reinforcing means therein to tend to prevent inward crushing of said outer hose in a manner to damage said Venturi means.
4. A hose assembly as set forth in claim 3, wherein said wire reinforcing means comprises a single wire of metallic material disposed in a helical manner along the axial length of said outer hose.
5. In a method of making a hose assembly having a first 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 said first fluid passage therein, and a flexible outer hose having an inner peripheral surface and being disposed around said inner hose, said inner peripheral surface of said outer hose and said outer peripheral surface of said inner hose defining said second fluid passage therebetween, said inner hose having a Venturi means therein that tends to remove liquid from a certain area of said second fluid passage, said Venturi means having an inlet opening that is generally flat and generally faces said inner peripheral surface so as to be adapted to interconnect said second fluid passage with said first fluid passage through said Venturi means, the improvement characterized by the steps of forming said outer hose to be corrugated in a helical manner so that said inner peripheral surface thereof defines alternating crests and valleys, with each crest and each valley defining an arcuate surface, and forming said arcuate valleys and crests to be of such a size that they will not completely block said inlet opening when said inlet opening is engaging said inner surface of said outer hose.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US91306086A | 1986-09-29 | 1986-09-29 | |
US913,060 | 1986-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1297806C true CA1297806C (en) | 1992-03-24 |
Family
ID=25432894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000548061A Expired - Lifetime CA1297806C (en) | 1986-09-29 | 1987-09-28 | Hose assembly and method of making the same |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0335880B1 (en) |
JP (1) | JPH0825598B2 (en) |
AU (1) | AU598617B2 (en) |
CA (1) | CA1297806C (en) |
DE (1) | DE3789237T2 (en) |
WO (1) | WO1988002336A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4951720A (en) * | 1987-09-18 | 1990-08-28 | Dayco Products, Inc. | Hose assembly and method of making the same |
EP0412082A1 (en) * | 1987-09-18 | 1991-02-13 | DAYCO PRODUCTS, Inc. | Hose assembly and method of making the same |
US5353835A (en) * | 1993-09-23 | 1994-10-11 | Ingersoll-Rand Company | Air tank drain |
KR101324097B1 (en) * | 2013-04-22 | 2013-10-31 | (주)동명엔터프라이즈 | Apparatus for retrieving volatile organic compound of oil storage tank |
KR101805720B1 (en) * | 2015-11-26 | 2017-12-06 | 엘아이지넥스원 주식회사 | Sealing apparatus having improved structure |
CN107176583A (en) * | 2017-07-13 | 2017-09-19 | 陆清煌 | A kind of device for recovering oil and gas of nozzle |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2236731A (en) * | 1939-03-08 | 1941-04-01 | Tokheim Oil Tank & Pump Co | Dispensing device |
US2837121A (en) * | 1956-01-30 | 1958-06-03 | Fred T Roberts | Flexible hose and method and apparatus for making same |
US3213889A (en) * | 1963-09-30 | 1965-10-26 | Ric Wil Inc | Pipe support |
US3274316A (en) * | 1964-07-20 | 1966-09-20 | Gates Rubber Co | Method of making reinforced corrugated hose |
US3638970A (en) * | 1968-02-12 | 1972-02-01 | Becker Drilling Alberta Ltd | Joint for double-walled drill pipe |
US3863687A (en) * | 1972-05-04 | 1975-02-04 | Phillips Petroleum Co | Return of vapor condensate formed in dispensing vaporous liquid |
US3913633A (en) * | 1974-10-21 | 1975-10-21 | Weil Mclain Company Inc | Liquid dispensing and vapor recovery system |
US4057086A (en) * | 1975-02-27 | 1977-11-08 | Healy James W | Vapor control |
US3980112A (en) * | 1975-03-21 | 1976-09-14 | Dayco Corporation | Conduit assembly for conveying volatile fluids |
US3981335A (en) * | 1975-03-31 | 1976-09-21 | Weil-Mclain Co., Inc. | Liquid dispensing and vapor recovery system utilizing an injector and a valve for permitting operation of leak detecting apparatus |
US4090539A (en) * | 1976-11-10 | 1978-05-23 | The B. F. Goodrich Company | Anti-pollution service station assembly |
US4072934A (en) * | 1977-01-19 | 1978-02-07 | Wylain, Inc. | Method and apparatus for detecting a blockage in a vapor flow line |
US4149739A (en) * | 1977-03-18 | 1979-04-17 | Summa Corporation | Dual passage pipe for cycling water to an undersea mineral aggregate gathering apparatus |
US4167958A (en) * | 1978-03-20 | 1979-09-18 | Atlantic Richfield Company | Hydrocarbon fuel dispensing, vapor controlling system |
US4167957A (en) * | 1978-03-20 | 1979-09-18 | Atlantic Richfield Company | Hydrocarbon fuel dispensing, vapor controlling system |
US4306594A (en) * | 1979-07-19 | 1981-12-22 | Texaco Inc. | Vacuum assist fuel system |
US4566504A (en) * | 1983-09-15 | 1986-01-28 | Gilbarco Inc. | Insertion tube liquid evacuator system for vapor recovery hose |
US4687033A (en) * | 1984-03-15 | 1987-08-18 | Gilbarco, Inc. | Venturi liquid evacuator system for maintaining clear vapor path in vapor recovery hose |
CA1276917C (en) * | 1984-03-15 | 1990-11-27 | Roger W. Furrow | Venturi liquid evacuator system for maintaining clear vapor path in vapor recovery hose |
-
1987
- 1987-09-25 DE DE3789237T patent/DE3789237T2/en not_active Expired - Lifetime
- 1987-09-25 EP EP19870907848 patent/EP0335880B1/en not_active Expired - Lifetime
- 1987-09-25 JP JP63500123A patent/JPH0825598B2/en not_active Expired - Lifetime
- 1987-09-25 AU AU82784/87A patent/AU598617B2/en not_active Expired
- 1987-09-25 WO PCT/US1987/002467 patent/WO1988002336A1/en active IP Right Grant
- 1987-09-28 CA CA000548061A patent/CA1297806C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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DE3789237T2 (en) | 1994-10-06 |
EP0335880A4 (en) | 1989-12-12 |
EP0335880B1 (en) | 1994-03-02 |
JPH02500830A (en) | 1990-03-22 |
JPH0825598B2 (en) | 1996-03-13 |
AU598617B2 (en) | 1990-06-28 |
DE3789237D1 (en) | 1994-04-07 |
EP0335880A1 (en) | 1989-10-11 |
AU8278487A (en) | 1988-04-21 |
WO1988002336A1 (en) | 1988-04-07 |
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Legal Events
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MKEX | Expiry |