Refilling nozzle with vapor recovery relief valve
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B67D-007/36
B67D-007/48
출원번호
US-0046286
(2011-03-11)
등록번호
US-8528609
(2013-09-10)
발명자
/ 주소
Garrison, Timothy M.
Lauber, Matthew R.
Schubert, Harold M.
출원인 / 주소
Delaware Capital Formation, Inc.
대리인 / 주소
Thompson Hine L.L.P.
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
A nozzle system including a nozzle body configured to dispense fuel through a fuel path thereof into a vehicle tank. The nozzle body includes a vapor path configured such that vapor recovered from the vehicle tank during refueling is passable therethrough. The nozzle system further includes a main v
A nozzle system including a nozzle body configured to dispense fuel through a fuel path thereof into a vehicle tank. The nozzle body includes a vapor path configured such that vapor recovered from the vehicle tank during refueling is passable therethrough. The nozzle system further includes a main vapor valve positioned in the vapor path and configured to selectively block the vapor path. The main vapor valve is movable to a position wherein the main vapor valve does not block the vapor path. The nozzle system further includes a relief valve in fluid communication with the vapor path. The relief valve is configured to open to allow ambient air to enter into the vapor path when sufficiently low pressure is present in the vapor path, and the relief valve is generally aligned with the main vapor valve.
대표청구항▼
1. A nozzle system comprising: a nozzle body configured to dispense fuel through a fuel path thereof into a vehicle tank, said nozzle body including a vapor path configured such that vapor recovered from said vehicle tank during refueling is passable therethrough, the nozzle body having an opening t
1. A nozzle system comprising: a nozzle body configured to dispense fuel through a fuel path thereof into a vehicle tank, said nozzle body including a vapor path configured such that vapor recovered from said vehicle tank during refueling is passable therethrough, the nozzle body having an opening therein;a manually operable main vapor valve positioned in said vapor path and configured to selectively block said vapor path, wherein said main vapor valve is movable to a position wherein said main vapor valve does not block said vapor path;a manually operable main fluid valve; anda relief valve in fluid communication with said vapor path, said relief valve including a moveable portion biased away from said main vapor valve to bias said relief valve in a closed position, said moveable portion being configured to move toward said main vapor valve to open said relief valve and to allow ambient air to enter into said vapor path when low pressure sufficient to at least partially open said relief valve is present in said vapor path;wherein said main vapor valve, said main fluid valve, and said relief valve are all in axial alignment and are all positioned within said opening of said nozzle body. 2. The nozzle system of claim 1 wherein said relief valve is movable between a closed position wherein said relief valve generally blocks ambient air from entering into said vapor path and an open position wherein said relief valve allows ambient air to enter into said vapor path, wherein said relief valve is automatically movable into said open position when said low pressure is present in said vapor path. 3. The nozzle system of claim 1 wherein said relief valve includes the movable portion and a valve seat, and wherein said movable portion is urged into contact with said valve seat when a positive pressure, relative to the ambient pressure, is present in said vapor path. 4. The nozzle system of claim 1 wherein said relief valve is positioned at or adjacent to a highest position of said vapor path in said nozzle body when said nozzle body is in a dispensing position. 5. The nozzle system of claim 1 wherein said relief valve is positioned upstream of said main vapor valve in said vapor path with respect to the direction of recovered vapor flow when said main vapor valve is open and when said main vapor valve is closed. 6. The nozzle system of claim 1 wherein said main vapor valve is movable between an open and a closed position in an axial direction, and wherein said relief valve is aligned with said axis of main vapor valve. 7. The nozzle system of claim 1 wherein said relief valve is positioned immediately above said main vapor valve when said nozzle is in a dispensing position. 8. The nozzle system of claim 1 wherein said relief valve is configured to open when the vapor path is at a negative pressure of about 1.5 inches of water column gage or less relative to ambient pressure. 9. The nozzle system of claim 1 wherein said relief valve and said main vapor valve are configured such that when said relief valve is removed from said opening said opening provides access to said main vapor valve. 10. The nozzle system of claim 1 further including a shut-off device configured to cause said nozzle to move to a state wherein said fluid path and said vapor path are generally blocked when a low pressure sufficient to actuate said shut-off device is applied to said shut-off device. 11. The nozzle system of claim 1 wherein said relief valve is a diaphragm valve, and wherein said main vapor valve is manually movable to said position wherein said main vapor valve does not block said vapor path. 12. The nozzle system of claim 1 wherein said nozzle includes a spout and a boot generally receiving a base end of said spout therein, said boot being configured to generally form a seal with a vehicle body around said spout when said spout is inserted into a fuel tank or fill pipe of a vehicle, and wherein said boot lacks any openings formed therethrough. 13. A nozzle comprising: a nozzle body configured to dispense fuel through a fuel path thereof into a vehicle tank, said nozzle body including a vapor path configured such that vapor recovered from said vehicle tank during refueling is passable therethrough;a main vapor valve positioned in said vapor path and configured to selectively block said vapor path;a main fuel valve positioned in said fuel path and configured to selectively block said fuel path, wherein said main fuel valve is manually movable to a position wherein said main fuel valve does not block said fuel path, and wherein said relief valve is axially aligned with said main fuel valve; anda relief valve in fluid communication with said vapor path, said relief valve being configured to allow ambient air to enter into said vapor path when a sufficient pressure differential exists between said vapor path and ambient pressure, wherein said relief valve includes a moveable portion and a housing with at least one opening therein, said movable portion being positioned between said housing and said main vapor valve, wherein said relief valve is biased into a closed position wherein said movable portion seals said at least one opening of said housing, and wherein said moveable portion is moveable away from said housing and toward said main vapor valve to unseal said at least one opening when said sufficient pressure differential exists. 14. The nozzle of claim 13 wherein said relief valve is positioned immediately above said main vapor valve. 15. A nozzle system comprising: a nozzle body configured to dispense fuel through a fuel path thereof into a vehicle tank, said nozzle body including a vapor path configured such that vapor recovered from said vehicle tank during refueling is passable therethrough, wherein flow through said vapor path is operatively controlled by a main vapor valve in said nozzle body;a shut-off device in fluid communication with said vapor path, wherein said shut-off device is triggered at a first pressure differential within said vapor path;a relief valve in fluid communication with said vapor path and in axial alignment with said main vapor valve, said relief valve being configured to open to allow ambient air into said vapor path when sufficiently low pressure is present in said vapor path to reduce nuisance shut-offs during fuel dispensing, wherein said relief valve is opened at a second pressure differential within said vapor path, and wherein said vapor path remains open when said relief valve is open;wherein the first pressure differential is greater than the second pressure differential. 16. A method for dispensing fuel comprising: providing a refueling system with a nozzle having a fuel path, a vapor path, a main vapor valve positioned in said vapor path and configured to selectively block said vapor path, a relief valve in fluid communication with said vapor path, wherein said relief valve is generally aligned with said main vapor valve, and a shut-off device in fluid communication with said vapor path;allowing fuel to flow through said fuel path into a vehicle tank;allowing vapors from said vehicle tank to enter said vapor path during said first allowing fuel to flow step; andallowing said relief valve to open when there is a pressure differential sufficient to open said relief valve between said vapor path and the ambient atmosphere to thereby at least partially dissipate said pressure differential to reduce nuisance shut-offs whereby said shut-off device is triggered by a pressure differential greater than said pressure differential sufficient to open said relief valve, wherein said vapor path remains open when said relief valve is open. 17. The method of claim 16 wherein said relief valve resides in a closed position when said pressure differential is not sufficient to open said relief valve, and wherein said relief valve moves to an open position when the pressure in said vapor path is sufficient to open said relief valve. 18. The method of claim 16 further comprising the step of allowing a vacuum to be applied to said refueling system by an on-board vapor recovery system of a vehicle associated with said vehicle tank, wherein said applied vacuum at least partially contributes to said pressure differential. 19. The method of claim 16 wherein said allowing said relief valve to open step includes allowing ambient air to enter into said vapor path via said relief valve. 20. The method of claim 16 wherein the method further includes, before said allowing fuel to flow step, allowing a user to manually move the main vapor valve to an open position wherein said main vapor valve does not block said vapor path, and wherein said relief valve is positioned upstream of said main vapor valve in said vapor path with respect to the direction of recovered vapor flowing therethrough. 21. The method of claim 16 wherein the method further includes allowing said shut-off device to move to a state wherein said fluid path and said vapor path are generally caused to be blocked when a low pressure sufficient to actuate said shut-off device is applied to said shut-off device. 22. The system of claim 1 wherein said relief valve is exposed to an entire pressure of fluid in said vapor path when said main vapor valve is open. 23. The system of claim 13 wherein said main fuel valve is positioned between said relief valve and said main vapor valve, or said main vapor valve is positioned between said relief valve and said main fuel valve. 24. The system of claim 1 wherein said main vapor valve is biased into a closed position by a vapor valve spring, and wherein said moveable portion of said relief valve is positioned entirely radially inside said vapor valve spring. 25. A method of assembling a nozzle comprising: providing a nozzle body having a fuel path, a vapor path, and an opening therein;inserting a main fluid valve through said opening and positioning said main fluid valve in said fluid path to operatively control flow through said fuel path;inserting a main vapor valve through said opening and positioning said main vapor valve in said vapor path to operatively control flow through said vapor path, wherein said main vapor valve is axially aligned with said main fluid valve; andafter said first two inserting steps, inserting a relief valve through said opening and in communication with said vapor path, wherein said relief valve is axially aligned with said main fluid valve and said main vapor valve, and wherein said relief valve is operatively connected to said vapor path to allow ambient air to enter into said vapor path when low pressure sufficient to at least partially open said relief valve is present in said vapor path.
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이 특허에 인용된 특허 (9)
Wilder Paul R. (Hamilton OH), Automatic shut-off dispensing nozzle responsive to liquid in a tank reaching a predetermined level and to a supply press.
Leininger Donald L. (Cincinnati OH) Guertin Robert W. (Cincinnati OH) Baker Bruce P. (Cincinnati OH), Vapor recovery nozzles and sub-assemblies therefor.
Leininger Donald L. (Cincinnati OH) Guertin Robert W. (Cincinnati OH) Baker Bruce P. (Cincinnati OH), Vapor recovery nozzles and sub-assemblies therefor.
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