IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0300772
(2011-11-21)
|
등록번호 |
US-8430120
(2013-04-30)
|
발명자
/ 주소 |
- Laverdiere, Marc
- McLoughlin, Robert F.
- Gonnella, George
- Gashgaee, Iraj
- Marrs, Jennifer
|
출원인 / 주소 |
|
대리인 / 주소 |
Nields, Lemack & Frame, LLC
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
38 |
초록
▼
A proportional fluid control valve with improved linearity and reduced hysteresis is disclosed. The valve allows for smooth, gentle flow of fluid in a substantially linear fashion, with minimal turns. Preferably the valve is pneumatically actuated. Where temperature is not an issue, the valve can be
A proportional fluid control valve with improved linearity and reduced hysteresis is disclosed. The valve allows for smooth, gentle flow of fluid in a substantially linear fashion, with minimal turns. Preferably the valve is pneumatically actuated. Where temperature is not an issue, the valve can be actuated by any suitable means, including stepper motors, linear motors, voice coils or other force actuators. A versatile molded valve body that requires fewer parts compared to a machined valve is disclosed. In one embodiment, the molded valve body is designed specifically for flow control and contains two sensor housings with carefully positioned flow paths to optimize the use of space. The sensor housing or housings can be separately formed as inserts, allowing installation in various orientations.
대표청구항
▼
1. A proportional fluid control valve, comprising a fluid inlet,a first annular cavity in fluid communication with said fluid inlet,an annular fluid passageway in fluid communication with said first annular cavity,a second annular cavity in fluid communication with said annular passageway,a fluid ou
1. A proportional fluid control valve, comprising a fluid inlet,a first annular cavity in fluid communication with said fluid inlet,an annular fluid passageway in fluid communication with said first annular cavity,a second annular cavity in fluid communication with said annular passageway,a fluid outlet in fluid communication with said second annular cavity,a first sensor housing in fluid communication with said fluid outlet, said first sensor housing having a sensor housing fluid outlet, anda second sensor housing in fluid communication with said sensor housing fluid outlet. 2. The proportional fluid control valve of claim 1, further comprising a pneumatic cavity in fluid communication with a pneumatic inlet, and at least one diaphragm in said first annular cavity, whereby pneumatic pressure applied to said pneumatic cavity deflects said diaphragm and opens said valve. 3. The proportional fluid control valve of claim 2, further comprising a spring that biases against said diaphragm and maintains said valve in a normally closed position until said bias is overcome by said pneumatic pressure. 4. The proportional fluid control valve of claim 1, wherein said first annular cavity, said second annular cavity, said first sensor housing and said second sensor housing are an integral molded component. 5. The proportional fluid control valve of claim 1, further comprising a frictional flow element between said sensor housing fluid outlet and said second sensor housing. 6. The proportional fluid control valve of claim 1, wherein said fluid inlet defines a first horizontal plane, said fluid outlet defines a second horizontal plane, and wherein said first and second horizontal planes do not intersect. 7. A valve, comprising a valve housing having a pneumatic cavity,a pneumatic diaphragm in said pneumatic cavity adapted to deflect upon the application of pressure to said pneumatic cavity,a first valve cavity,a first diaphragm in said first valve cavity, a second valve cavity,a second diaphragm in said second valve cavity, anda spring biasing said second diaphragm to prevent fluid communication between said first and second valve cavities until said bias is overcome by said application of pressure. 8. The valve of claim 7, wherein said first and second valve cavities are annular, and wherein said first cavity is in fluid communication with a linear fluid inlet path, and said second annular cavity is in fluid communication with a linear fluid outlet path. 9. The valve of claim 8, further comprising a pressure sensor in said linear fluid outlet path. 10. The valve of claim 8, wherein fluid enters said first annular cavity from said fluid inlet path and remains therein until the pneumatic pressure applied to said pneumatic diaphragm overcomes the bias of said spring. 11. The valve of claim 8, wherein said fluid inlet path defines a first horizontal plane, said fluid outlet path defines a second horizontal plane, and wherein said first and second planes do not intersect.
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