IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0503464
(1990-04-02)
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발명자
/ 주소 |
- Carmack, Paul D.
- Grantham, Rodger P.
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
16 인용 특허 :
13 |
초록
▼
A fuel dispensing nozzle includes a nozzle body and a projecting spout and surrounding bellows which define a fuel supply passage and a vapor return passage connected to corresponding concentric passages within flexible coaxial hoses. The body supports a manually actuated control valve within the fu
A fuel dispensing nozzle includes a nozzle body and a projecting spout and surrounding bellows which define a fuel supply passage and a vapor return passage connected to corresponding concentric passages within flexible coaxial hoses. The body supports a manually actuated control valve within the fuel passage, and a pressure responsive check valve is also located within the fuel passage adjacent the spout. The check valve includes a valve member normally biased against a tapered valve seat, and a first venturi suction passage extends from the valve seat to control a pressure responsive diaphragm mechanism for automatically closing the manually actuated valve when fuel blocks a suction vent line within the of the spout. A second venturi suction passage extends from the valve seat through the nozzle body and connects with a fuel evacuation passage within a flexible tube which extends downwardly into the vapor passage within the coaxial hoses. The vapor return passage within the nozzle body is normally closed by a spring biased valve member which opens in response to collapsing of the bellows, and excessive vapor pressure within the vapor passage also operates the diaphragm mechanism to close the manually actuated valve.
대표청구항
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1. A dispensing nozzle assembly adapted for use with a vapor recovery fuel dispensing system including flexible hoses defining a liquid fuel supply passage and a return vapor passage, said nozzle assembly comprising a nozzle body, an elongated fuel supply spout extending from said body, means defini
1. A dispensing nozzle assembly adapted for use with a vapor recovery fuel dispensing system including flexible hoses defining a liquid fuel supply passage and a return vapor passage, said nozzle assembly comprising a nozzle body, an elongated fuel supply spout extending from said body, means defining a primary fuel supply passage and a return vapor passage extending from said spout through said body and for forming extensions of the corresponding passages within the hoses, a manually actuated fuel control valve within said fuel supply passage within said body, means for automatically closing said fuel control valve in response to the presence of fuel adjacent said spout, pressure responsive check valve means within said fuel supply passage downstream of said control valve and adjacent said spout, means for normally biasing said check valve means towards a closed position, said check valve means defining a first venturi suction passage connected to actuate said means for automatically closing said fuel control valve, means defining a second venturi suction passage extending from said check valve means, means for separating said first and second venturi passages of said check valve means, and means defining a fuel evacuation passage extending from said second venturi passage through said nozzle body and into the return vapor passage within the hoses for efficiently aspirating fuel condensed from vapor and accumulated within the return vapor passage within the hoses into the fuel flowing within said spout and for minimizing the fuel flow restrictions within the hoses and said nozzle assembly. 2. A nozzle assembly as defined in claim 1 wherein said check valve means includes a seat member having a tapered surface, and said first and second venturi passages extend from tapered surface. 3. A nozzle assembly as defined in claim 1 wherein said check valve means include a movable valve member and a seat member, and said separating means cooperate with said valve member and said seat member to form arcuate fuel flow passages for said first and second venturi passages. 4. A nozzle assembly as defined in claim 1 wherein said means for automatically closing said fuel control valve include flexible diaphragm means, means for releasing said control valve in response to movement of said diaphragm means, and means for moving said diaphragm means in response to a predetermined maximum vapor pressure within said vapor return passage within said body. 5. A nozzle assembly as defined in claim 1 wherein said means defining said fuel evacuation passage include a flexible evacuation tube adapted to extend into the vapor return passage within the hoses, and means providing said tube with lateral stiffness to maintain said tube usually within a lower portion of the vapor return passage within the hoses. 6. A nozzle assembly as defined in claim 1 wherein said means defining said vapor return passage include a collapsible tubular bellows surrounding said spout and having an inner end portion and an outer end portion, a tubular fitting connected to said inner end portion, said body including means supporting said fitting for axial movement, a normally closed vapor flow control valve within said vapor return passage within said body, and means for opening said vapor valve in response to axial movement of said fitting with collapsing of said bellows. 7. A nozzle assembly as defined in claim 1 wherein said check valve means include a valve member having an outer surface with a generally frusto-conical configuration, a seat member having an inner surface with a generally frusto-conical configuration and extending around said outer surface, said separating means include a set of circumferentially spaced posts extending axially from one of said surfaces, and the other said surface defines corresponding holes receiving said posts for axial sliding movement. 8. A nozzle assembly as defined in claim 1 wherein said body includes an outlet portion defining a bore, said check valve means include a support fitting disposed within said bore, a valve member and a seat member supported by said fitting, and said spout includes an inner end portion supported by said fitting. 9. A nozzle assembly as defined in claim 1 wherein said means defining said fuel evacuation passage within said body comprise an evacuation tube extending within said return vapor passage within said body. 10. A nozzle assembly as defined in claim 1 wherein said check valve means include a support member, means defining a set of separate suction chambers adjacent said support member, means defining a suction port connecting said suction chambers, a valve element disposed within said suction port, a movable vapor valve member within said vapor passage within said body, and means for closing said valve element and said suction port in response to closing said vapor valve member. 11. A nozzle assembly as defined in claim 1 wherein said means defining said fuel evacuation passage include a flexible evacuation tube adapted to extend into the vapor return passage within the hoses, and said tube having a width substantially greater than its thickness to provide said tube with lateral stiffness. 12. A dispensing nozzle assembly adapted for use with a vapor recovery fuel dispensing system including flexible hoses defining a liquid fuel supply passage and a return vapor passage, said nozzle assembly comprising a nozzle body, an elongated fuel supply spout extending from said body, means defining a primary fuel supply passage and a return vapor passage extending from said spout through said body and for forming extensions of the corresponding passages within the hoses, a manually actuated fuel control valve within said fuel supply passage within said body, means for automatically closing said fuel control valve in response to the presence of fuel adjacent said spout, pressure responsive check valve means within said fuel supply passage downstream of said control valve and including a valve member supported for movement relative to a stationary valve seat, means for biasing said valve member towards a normally closed position adjacent said valve seat, means defining a first venturi suction passage extending from said valve seat and connected to actuate said means for automatically closing said fuel control valve, means defining a second venturi suction passage extending from said valve seat, said valve member and said valve seat including means for separating said first and second venturi passages, and means defining a fuel evacuation passage connected to said second venturi passage and adapted to extend into the return vapor passage within the hoses for efficiently aspirating fuel condensed from vapor and accumulated within the return vapor passage within the hoses into the fuel flowing within said spout and for minimizing fuel flow restrictions within the hoses and said nozzle assembly. 13. A nozzle assembly as defined in claim 12 wherein said valve seat is tapered, said valve member has a tapered surface adjacent said seat, and said separating means extend between said tapered surface and said tapered seat to form separate arcuate fuel flow passages for said first and second venturi passages. 14. A nozzle assembly as defined in claim 12 wherein said means defining said fuel evacuation passage include a flexible evacuation tube adapted to extend into the vapor return passage within the hoses, and means providing said tube with lateral stiffness to maintain said tube usually within a lower portion of the vapor return passage within the hoses. 15. A nozzle assembly as defined in claim 12 wherein said means defining said vapor return passage include a collapsible tubular bellows surrounding said spout and having an inner end portion and an outer end portion, a tubular fitting connected to said inner end portion, said body including means supporting said fitting for axial movement, a normally closed vapor flow control valve within said vapor return passage within said body, and means for opening said vapor valve in response to axial movement of said fitting with collapsing of said bellows. 16. A nozzle assembly as defined in claim 12 wherein said valve member has an outer surface with a generally frusto-conical configuration, said seat has a generally frusto-conical configuration and extends around said outer surface, said separating means include a set of circumferentially spaced posts extending axially from said outer surface, and said seat defines corresponding holes receiving said posts for axial sliding movement. 17. A nozzle assembly as defined in claim 12 wherein said means defining said fuel evacuation passage comprise a deformable evacuation tube extending within said return vapor passage within said body. 18. A dispensing nozzle assembly adapted for use with a vapor recovery fuel dispensing system including flexible hoses defining a liquid fuel supply passage and a return vapor passage, said nozzle assembly comprising a nozzle body, an elongated fuel supply spout extending from said body, means defining a primary fuel supply passage and a return vapor passage extending from said spout through said body and for forming extensions of the corresponding passages within the hoses, a manually actuated fuel control valve within said fuel supply passage within said body, means for automatically closing said fuel control valve in response to the presence of fuel adjacent said spout, a single flow restriction means downstream of said control valve and defining first and second venturi suction passages, said first venturi suction passage connected to actuate said means for automatically closing said fuel control valve, and means defining a fuel evacuation passage extending from said second venturi passage through said nozzle body and, adapted to extend into the return vapor passage within the hoses for efficiently aspirating fuel condensed from vapor and accumulated within the return vapor passage within the hoses into the fuel flowing within said spout and for minimizing the fuel flow restrictions within the hoses and said nozzle assembly. 19. A nozzle assembly as defined in claim 18 wherein said single flow restriction means comprise a check valve including a seat member having a tapered surface, and said first and second venturi passages extend from tapered surface. 20. A nozzle assembly as defined in claim 18 wherein said single flow restriction means comprise a check valve including a movable valve member and a seat member, and said separating means cooperate with said valve member and said seat member to form arcuate fuel flow passages for said first and second venturi passages. 21. A nozzle assembly as defined in claim 18 wherein said means defining said vapor return passage include a collapsible tubular bellows surrounding said spout and having an inner end portion and an outer end portion, a tubular fitting connected to said inner end portion, said body including means supporting said fitting for axial movement, a normally closed vapor flow control valve within said vapor return passage within said body, and means for opening said vapor valve in response to axial movement of said fitting with collapsing of said bellows. 22. A dispensing nozzle assembly adapted for use with a vapor recovery fuel dispensing system including flexible hoses defining a liquid fuel supply passage and a return vapor passage, said nozzle assembly comprising a nozzle body, an elongated fuel supply spout extending from said body, means associated with said body and defining a primary fuel supply passage and a return vapor passage extending from said spout for forming extensions of the corresponding passages within the hoses, a fuel control valve within said fuel supply passage within said body, means for automatically closing said fuel control valve in response to the presence of fuel adjacent said spout, means defining a fuel flow restriction passage within said body, means defining a first venturi suction passage extending from said restriction passage and connected to actuate said means for automatically closing said fuel control valve, means defining a second venturi suction passage extending from said restriction passage and separated from said first venturi passage, and means associated with said body and defining a fuel evacuation passage extending from said second venturi passage into the return vapor passage within the hoses for efficiently aspirating fuel condensed from vapor and accumulated within the return vapor passage within the hoses into the fuel flowing within said spout and for minimizing the fuel flow restrictions within the hoses and said nozzle assembly.
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