IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0585260
(2009-09-10)
|
등록번호 |
US-8220481
(2012-07-17)
|
우선권정보 |
JP-2008-238005 (2008-09-17); JP-2009-190132 (2009-08-19) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
11 |
초록
▼
A fuel shutoff valve includes a valve chamber, a casing, a float, and a shock absorber. The casing includes a body, a cylinder, and a seal. The float is accommodated in the valve chamber. The shock absorber includes a seat attaching to and detaching from the seal of the casing. The shock absorber in
A fuel shutoff valve includes a valve chamber, a casing, a float, and a shock absorber. The casing includes a body, a cylinder, and a seal. The float is accommodated in the valve chamber. The shock absorber includes a seat attaching to and detaching from the seal of the casing. The shock absorber includes a first arm, a second arm, a contact, and a locker. The first arm protrudes outward from the seat of the shock absorber diametrically, and exhibits elasticity. The second arm exhibits elasticity. The contact is disposed at the leading end of the second arm, and comes in contact with the float. The locker is disposed at a diametrically-outer-side leading end of the first arm, and locks to the body of the casing when the shock absorber is positioned at the lowermost level in the valve chamber.
대표청구항
▼
1. A fuel shutoff valve being mounted on the top of fuel tank, and opening and closing a connector passage that connects the inside of the fuel tank to the outside, thereby communicating the inside of the fuel tank with the outside and shutting off the inside of the fuel tank from the outside, the f
1. A fuel shutoff valve being mounted on the top of fuel tank, and opening and closing a connector passage that connects the inside of the fuel tank to the outside, thereby communicating the inside of the fuel tank with the outside and shutting off the inside of the fuel tank from the outside, the fuel shutoff valve comprising: a valve chamber for communicating the connector passage with the inside of the fuel tank;a casing comprising a body for forming the valve chamber, a cylinder being disposed on an upper side of the body and protruding into the valve chamber to form the connector passage, and a seal being disposed at a lower end of the cylinder;a float being accommodated in the valve chamber, comprising an engager, and ascending and descending within the valve chamber, depending on a buoyant force that results from a liquid-fuel level within the valve chamber to exert on the float; anda shock absorber being disposed between the seal of the casing and the float, comprising an engagee that engages with the engager of the float when the float descends at least, and a seat that attaches to and detaches from the seal of the casing, and the shock absorber ascending and descending along with the float within the valve chamber to attach and detach the seat to and from the seal, thereby closing and opening the connector passage;the shock absorber further comprising:the seat being disposed at a diametrically central part of the shock absorber;the engagee being disposed on a diametrically outer side of the seat;a first arm protruding toward a diametrically outer side of the seat, and exhibiting elasticity;a second arm protruding from one of the first arm and the seat, having a leading end that makes a free end, and exhibiting elasticity;a contact being disposed at the leading end of the second arm, and coming in contact with the ascending float; anda locker being disposed at a diametrically-outer-side leading end of the first arm, and locking to the body of the casing when the shock absorber is positioned at the lowermost level in the valve chamber. 2. The fuel shutoff valve according to claim 1, wherein: the shock absorber further comprises a top wall having an upper surface and a lower surface;the upper surface of the top wall makes the seat; andthe top wall makes: the contact that projects from the lower surface of the top wall and is disposed at the diametrically-outer-side leading end of the second arm;the second arm that undergoes upward elastic deformation when the ascending float comes in contact with the contact; andthe first arm that undergoes downward elastic deformation when the descending float locks the locker of the shock absorber to the body of the casing. 3. The fuel shutoff valve according to claim 2, wherein: the first arm is provided with the locker at a leading end thereof;the body of the casing is provided with a side wall that has a guide hole for guiding the ascending and descending locker; andthe locker locks to a lower end of the guide hole of the body when the shock absorber is positioned at the lowermost level in the valve chamber. 4. The fuel shutoff valve according to claim 1, wherein: the first arm is provided with the locker at a leading end thereof;the body of the casing is provided with a side wall that has a guide hole for guiding the ascending and descending locker; andthe locker locks to a lower end of the guide hole of the body when the shock absorber is positioned at the lowermost level in the valve chamber. 5. The fuel shutoff valve according to claim 1, wherein: the shock absorber comprises the first arm, and the second arm that make a dual-structured major arm in which the first arm protrudes from the seat toward a diametrically outer side and then back toward a diametrically inner side so as to go around the second arm without making any contact with the second arm; andthe shock absorber further comprises a minor arm that is connected to one of opposite roots of the first arm and is provided with the engagee, thereby deforming the first arm downward elastically by way of the minor arm when the engager of the descending float engages with the engagee. 6. The fuel shutoff valve according to claim 5, wherein the shock absorber comprises a plurality of the major arms and minor arms that are disposed alternately in a peripheral direction thereof. 7. The fuel shutoff valve according to claim 2, wherein: the first arm protrudes as a framed shape toward a diametrically outer side of the seat; andthe first arm surrounds the second arm by way of a slit that is provided between the first arm and the second arm. 8. The fuel shutoff valve according to claim 1, wherein: the first arm is provided with an extension that faces the body of the casing and extends in an ascending/descending direction of the shock absorber;the extension has a base end that is connected to the diametrically-outer-side leading end of the first arm that the top wall of the shock absorber makes; andthe extension has a leading end that makes a free end and is provided with the locker. 9. The fuel shutoff valve according to claim 1, wherein the second arm has a base end that is connected to the seat, and the leading end that extends outward diametrically. 10. A fuel shutoff valve being mounted on the top of fuel tank, and opening and closing a connector passage that connects the inside of the fuel tank to the outside, thereby communicating the inside of the fuel tank with the outside and shutting off the inside of the fuel tank from the outside, the fuel shutoff valve comprising: a valve chamber for communicating the connector passage with the inside of the fuel tank;a casing comprising a body for forming the valve chamber, a cylinder being disposed on an upper side of the body and protruding into the valve chamber to form the connector passage, and a seal being disposed at a lower end of the cylinder;a float comprising a seat that attaches to and detaches from the seal of the casing, and an engager, and ascending and descending within the valve chamber, depending on a buoyant force that results from a liquid-fuel level within the valve chamber to exert on the float, thereby attaching the seat to and detaching the seat from the seal of the casing to close and open the connector passage; anda shock absorber being disposed between the seal of the casing and the float, and being retained to the body of the casing;the shock absorber comprising:a through hole opening at a diametrically central part of the shock absorber, thereby enabling the seat of the float to advance and retract therein;a first arm protruding from a peripheral end of the through hole toward a diametrically outer side of the seat, and exhibiting elasticity;a second arm protruding from one of the first arm and the through hole, having a leading end that makes a free end, and exhibiting elasticity;a contact being disposed at the leading end of the second arm, and attaching to and detaching from the float;a locker being disposed at a diametrically-outer-side leading end of the first arm, and locking to the body of the casing; andan engagee being disposed on a diametrically outer side with respect to the through hole, and engaging with and disengaging from the engager of the float. 11. The fuel shutoff valve according to claim 10, wherein: the shock absorber further comprises a top wall having an upper surface and a lower surface;the top wall makes: the contact that projects from the lower surface of the top wall and is disposed at the diametrically-outer-side leading end of the second arm;the second arm that undergoes upward elastic deformation when the ascending float comes in contact with the contact; andthe first arm that undergoes downward elastic deformation when the engagee of the shock absorber engages with the engager of the descending float. 12. The fuel shutoff valve according to claim 11, wherein: the first arm is provided with the locker at a leading end thereof; andthe body of the casing comprises a side wall that has a guide hole for locking to the locker of the shock absorber. 13. The fuel shutoff valve according to claim 10, wherein: the first arm is provided with the locker at a leading end thereof; andthe body of the casing comprises a side wall that has a guide hole for locking to the locker of the shock absorber. 14. The fuel shutoff valve according to claim 10, wherein: the shock absorber comprises the first arm, and the second arm that make a dual-structured major arm in which the first arm protrudes from the seat toward a diametrically outer side and then back toward a diametrically inner side so as to go around the second arm without making any contact with the second arm; andthe shock absorber further comprises a minor arm that is connected to one of opposite roots of the first arm and is provided with the engagee, thereby deforming the first arm downward elastically by way of the minor arm when the engager of the protrusion of the descending float engages with the engagee. 15. The fuel shutoff valve according to claim 14, wherein the shock absorber comprises a plurality of the major arms and minor arms that are disposed alternately in a peripheral direction thereof. 16. The fuel shutoff valve according to claim 10, wherein: the first arm protrudes as a framed shape toward a diametrically outer side of the seat; andthe first arm surrounds the second arm by way of a slit that is provided between the first arm and the second arm. 17. The fuel shutoff valve according to claim 10, wherein: the first arm is provided with an extension that faces the body of the casing and extends in an ascending/descending direction of the shock absorber;the extension has a base end that is connected to the diametrically-outer-side leading end of the first arm that the top wall of the shock absorber makes; andthe extension has a leading end that makes a free end and is provided with the locker. 18. The fuel shutoff valve according to claim 10, wherein the second arm has a base end that is connected to the seat, and the leading end that extends outward diametrically.
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