IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0354394
(2006-02-15)
|
| 등록번호 |
US-8096315
(2012-01-17)
|
|
발명자
/ 주소 |
- Bolt, David J.
- Ewing, Dale
- Reese, Shane
- Reid, Kent
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
Nelson Mullins Riley & Scarborough LLP
|
| 인용정보 |
피인용 횟수 :
1 인용 특허 :
47 |
초록
▼
A double-walled contained shear valve comprises of an inner housing forming a fuel flow path, and a containment housing surrounding the inner housing, either partially or wholly, to provide a secondary containment. An interstitial space is formed between the inner housing and the containment housing
A double-walled contained shear valve comprises of an inner housing forming a fuel flow path, and a containment housing surrounding the inner housing, either partially or wholly, to provide a secondary containment. An interstitial space is formed between the inner housing and the containment housing as a result, and may be placed under a vacuum or pressure level to monitor for leaks. A vacuum actuator coupled to the interstitial space automatically opens and closes the fuel flow path of the shear valve in response to the vacuum level in the interstitial space to prevent leaks to the environment. The shear valve may contain a flange for connection to internal fuel dispenser piping that either does or does not includes interstitial space orifices to couple the shear valve interstitial space to the fuel dispenser piping interstitial space to monitor the vacuum or pressure level in these interstitial spaces as one contiguous space.
대표청구항
▼
1. A shear valve that carries fuel from a branch or main fuel piping to fuel dispenser piping, comprising: a housing having an axial length extending between a first end and a second end thereof, said housing defining a shear groove on the outside circumference of the housing, said housing being ini
1. A shear valve that carries fuel from a branch or main fuel piping to fuel dispenser piping, comprising: a housing having an axial length extending between a first end and a second end thereof, said housing defining a shear groove on the outside circumference of the housing, said housing being initially unbroken at said shear groove but breakable at said shear groove in response to a shearing force;the housing containing an orifice therein forming a fuel flow path;a main poppet valve coupled to the housing that is adapted to close the fuel flow path to prevent flow of fuel; anda flexible leak skirt fixed to an exterior of the housing at a first location upstream of said shear groove and a second location downstream of said shear groove, said leak skirt surrounding the unbroken shear groove but not surrounding a remainder of said housing along said axial length thereof further upstream and downstream of said first and second locations to provide a leak containment chamber to contain fuel leaking through the shear groove in the event of a leak that subsequently occurs at the shear groove due to a break at said shear groove. 2. The valve of claim 1, wherein said leak skirt comprises an elastic material. 3. The valve of claim 2, wherein the housing contains a main poppet valve seat along the orifice adapted to seat the main poppet valve when closed to close the fuel flow path. 4. The valve of claim 3, wherein the main poppet valve is adapted to close off an upstream fuel flow path from the housing fuel flow path in response to a shear. 5. The valve of claim 4, further comprising a secondary poppet valve and secondary poppet valve seat coupled to the housing, said secondary poppet valve adapted to close off a downstream fuel flow path from the housing fuel flow path in response to a shear. 6. The valve of claim 1, wherein said leak skirt comprises an elastomer material. 7. The shear valve of claim 1, wherein said housing includes an upstream housing and a separate downstream housing connected together. 8. A shear valve for use with a fuel dispenser, comprising: a housing having an axial length extending between a first end and second end thereof, said housing defining a shear groove on the outside circumference of the housing, said housing being initially unbroken at said shear groove but breakable at said shear groove in response to a shearing force;the housing containing an orifice therein forming a fuel flow path;a main valve coupled to the housing that is adapted to close the fuel flow path to prevent flow of fuel, wherein the main valve is adapted to close off an upstream fuel flow path in response to a shear, and wherein the housing contains a main valve seat along the orifice engaged by the main valve when closed;a flexible leak skirt fixed to an exterior of the housing at a first location upstream of said shear groove and a second location downstream of said shear groove and comprising an elastomer material, said leak skirt surrounding the unbroken shear groove but not surrounding a remainder of said housing along said axial length thereof further upstream and downstream of said first and second locations to provide a leak containment chamber to contain fuel leaking through the shear groove in the event of a leak that subsequently occurs at the shear groove due to break at said shear groove; anda secondary poppet valve and secondary poppet valve seat in the housing, said secondary poppet valve adapted to close off a downstream fuel flow path from the housing fuel flow path in response to a shear. 9. The shear valve of claim 8, wherein said housing includes an upstream housing and a separate downstream housing connected together. 10. The shear valve of claim 8, wherein said main valve is a flapper. 11. The shear valve of claim 10, wherein said flapper is spring-loaded. 12. A shear valve that carries fuel from a branch or main fuel piping to fuel dispenser piping, comprising: a housing defining a shear groove on the outside circumference of the housing, said housing being initially unbroken at said shear groove but breakable at said shear groove in response to a shearing force;the housing containing an orifice therein forming a fuel flow path;a main poppet valve coupled to the housing that is adapted to close the fuel flow path to prevent flow of fuel;a flexible leak skirt coupled to an exterior of the housing, said leak skirt surrounding the unbroken shear groove to provide a leak containment chamber to contain fuel leaking through the shear groove in the event of a leak that subsequently occurs due to a break at said shear groove; andwherein said housing defines a containment housing and an inner housing coupled to the containment housing, and partially or fully surrounded by the containment housing, such that an interstitial space is formed separate from the fuel flow path between the containment housing and the inner housing. 13. A shear valve for use with a fuel dispenser, comprising: a housing defining a shear groove on the outside circumference of the housing, said housing being initially unbroken at said shear groove but breakable at said shear groove in response to a shearing force;the housing containing an orifice therein forming a fuel flow path;a main valve coupled to the housing that is adapted to close the fuel flow path to prevent flow of fuel, wherein the main valve is adapted to close off an upstream fuel flow path in response to a shear, and wherein the housing contains a main valve seat along the orifice engaged by the main valve when closed;a flexible leak skirt coupled to an exterior of the housing comprising an elastomer material, said leak skirt surrounding the unbroken shear groove to provide a leak containment chamber to contain fuel leaking through the shear groove in the event of a leak that subsequently occurs at the shear groove due to break at said shear groove;a secondary poppet valve and secondary poppet valve seat in the housing, said secondary poppet valve adapted to close off a downstream fuel flow path from the housing fuel flow path in response to a shear; andwherein said housing defines a containment housing and an inner housing coupled to the containment housing, and partially or fully surrounded by the containment housing, such that an interstitial space is formed separate from the fuel flow path between the containment housing and the inner housing.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.