IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0580678
(2009-10-16)
|
등록번호 |
US-8171965
(2012-05-08)
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발명자
/ 주소 |
- Burris, Steven Y.
- Strickland, David Michael
- Jones, Wilson A.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
9 |
초록
▼
A fuel leak prevention system and method for providing same includes a check valve for insertion into the discharge end of a spout assembly of a fuel dispensing nozzle, the check valve being located downstream of the nozzle's fuel control valve so as to prevent any leaking or dripping of fuel from t
A fuel leak prevention system and method for providing same includes a check valve for insertion into the discharge end of a spout assembly of a fuel dispensing nozzle, the check valve being located downstream of the nozzle's fuel control valve so as to prevent any leaking or dripping of fuel from the spout when the nozzle is deactivated. The check valve includes a pivoting flap that is preferably spring-loaded and predisposed to remain closed to seal the spout when there is no fuel flowing through the nozzle, but which is allowed to rotate within the spout to open the nozzle and allow the flow of fuel when the nozzle is activated. The system and method disclosed has application to any liquids that are to be dispensed, including petrol, diesel, kerosene, gas oil, gas, liquid petroleum gas, av-gas, chemicals, and water.
대표청구항
▼
1. A leak prevention system for use with a liquid dispensing nozzle, the nozzle in fluid communication with a liquid dispensing pump, the system comprising: a body portion;a spout assembly extending from the body portion, the spout assembly having an outlet end configured for dispensing the liquid;a
1. A leak prevention system for use with a liquid dispensing nozzle, the nozzle in fluid communication with a liquid dispensing pump, the system comprising: a body portion;a spout assembly extending from the body portion, the spout assembly having an outlet end configured for dispensing the liquid;a flow control valve in the body portion operable to allow or prevent the flow of liquid through a flow passage defined by the body portion; anda check valve comprising: a flap member pivotably attached within the spout assembly; anda closing member mounted within the spout assembly and oriented to engage the flap member to apply a continuous force to a rear face of the flap member;the check valve positioned within the spout assembly and downstream of the flow control valve and being responsive to the flow of liquid through the body portion and into the spout assembly; andwherein the check valve is biasedly disposed to remain closed when no liquid is flowing through the nozzle so as to prevent liquid from dripping from the outlet end when the nozzle is not activated. 2. The system of claim 1, wherein the check valve is located in the vicinity of the outlet end of the spout assembly. 3. The system of claim 1, wherein the force applied by the closing member is large enough to cause an opposing face of the flap member to seat in the spout assembly and remain seated when the nozzle is not activated, but the force is not so large to prevent the flap member from rotating to substantially open the spout assembly and allow the flow of liquid when the nozzle is activated. 4. The system of claim 1, wherein the closing member is a spring. 5. The system of claim 1, further comprising a stop member positioned inside the spout assembly and adapted to provide a seating area for the opposing face of the flap member and for preventing the flap member from rotating beyond a preset orientation. 6. The system of claim 1, wherein the flap member is substantially round. 7. The system of claim 4, wherein the spring is a torsion spring. 8. A leak prevention system for use with a liquid dispensing nozzle, the nozzle in fluid communication with a liquid dispensing pump, the system comprising: a body portion;a spout assembly extending from the body portion, the spout assembly having an outlet end configured for dispensing the liquid;a flow control valve in the body portion operable to allow or prevent the flow of liquid through a flow passage defined by the body portion; anda check valve comprising: a hinge pin secured inside the outer end of the spout assembly;a flap member being pivotably attached within the spout assembly, the flap member comprising a tab located at an outer edge of the flap member, the tab having a bore through a longitudinal axis of the tab and configured to receive the hinge pin such that the flap member can rotate about the longitudinal axis; anda spring mounted within the spout assembly and oriented to engage the flap member to apply a continuous force to a rear face of the flap member, the spring also configured to receive the hinge pin such that the spring is in constant communication with the flap member;the check valve positioned within the spout assembly and downstream of the flow control valve and being responsive to the flow of liquid through the body portion and into the spout assembly;wherein the force applied by the spring is large enough to cause an opposing face of the flap member to seat in the spout assembly and remain seated when the nozzle is not activated, but the force is not so large to prevent the flap member from rotating to substantially open the spout assembly and allow the flow of liquid when the nozzle is activated; andwherein the check valve is biasedly disposed to remain closed when no liquid is flowing through the nozzle so as to prevent liquid from dripping from the outlet end when the nozzle is not activated. 9. The system of claim 8, wherein the hinge pin is fixedly attached to an inner wall of the spout assembly; and wherein the inner wall contains a groove adapted to receive an upper surface of the tab and at least a portion of the spring such that the axis of rotation of the flap member is partially located within the inner wall to allow the flap member to rotate within the spout assembly and fully seat against the stop member without interference from the inner wall. 10. The system of claim 8, wherein the flap member is constructed of metal. 11. The system of claim 8, wherein the flap member is constructed of an elastomeric material. 12. The system of claim 8, wherein the rear face of the flap member further comprises a raised portion centrally located and configured to receive the closing member so as to distribute the closing member force across the flap member. 13. The system of claim 8, wherein the check valve is located below a vent opening of the spout assembly. 14. The system of claim 8, wherein the spring is a torsion spring. 15. A leak prevention system for use with a liquid dispensing nozzle, the nozzle being in fluid communication with a liquid dispensing pump and including a body portion, a spout assembly extending from the body portion, the spout assembly having an outlet end configured for dispensing the liquid, and a flow control valve in the body portion operable to allow or prevent the flow of liquid through a flow passage defined by the body portion, the system comprising: a spout extension configured to be fixedly attached to the outlet end of the spout assembly and having an outlet end configured for dispensing the liquid; anda check valve comprising: a hinge pin secured inside the outer end of the spout extension;a flap member being pivotably attached within the spout extension, the flap member comprising a tab located at an outer edge of the flap member, the tab having a bore through a longitudinal axis of the tab and configured to receive the hinge pin such that the flap member can rotate about the longitudinal axis; anda spring mounted within the spout extension and oriented to engage the flap member to apply a continuous force to a rear face of the flap member, the spring also configured to receive the hinge pin such that the spring is in constant communication with the flap member;the check valve positioned within the spout extension and being responsive to the flow of fuel through the body portion and into the spout assembly and the spout extension;wherein the force applied by the spring is large enough to cause an opposing face of the flap member to seat in the spout extension and remain seated when the nozzle is not activated, but the force is not so large to prevent the flap member from rotating to substantially open the spout extension and allow the flow of liquid when the nozzle is activated; andwherein the check valve is biasedly disposed to remain closed when no fuel is flowing through the nozzle so as to prevent liquid from dripping from the outlet end of the spout extension when the nozzle is not activated. 16. The system of claim 15, wherein the check valve is located in the vicinity of the outlet end of the spout extension. 17. The system of claim 15, further comprising a stop member positioned inside the spout extension and adapted to provide a seating area for the opposing face of the flap member and for preventing the flap member from rotating beyond a preset orientation. 18. The system of claim 15, wherein the hinge pin is fixedly attached to an inner wall of the spout extension; and wherein the inner wall contains a groove adapted to receive an upper surface of the tab and at least a portion of the spring such that the axis of rotation of the flap member is partially located within the inner wall to allow the flap member to rotate within the spout extension and fully seat against the stop member without interference from the inner wall. 19. The system of claim 15, wherein the rear face of the flap member further comprises a raised portion centrally located and configured to receive the closing member so as to distribute the closing member spring force across the flap member. 20. The system of claim 15, wherein the spout extension does not cover a vent opening of the spout assembly.
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