Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Reexamination Certificate
2005-05-31
2005-05-31
Look, Edward K. (Department: 3745)
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
C091S446000
Reexamination Certificate
active
06899012
ABSTRACT:
A fluid flow control valve assembly that can be actuated using an electrically operated or pneumatically operated flow control valve includes a valve body having a fluid supply passageway, a fluid exhaust passageway, and a fluid bypass passageway. A pilot operated relief valve is disposed in the fluid bypass passageway, wherein the pilot operated relief valve blocks the fluid bypass passageway to create a pressure upstream of the pilot operated relief valve to actuate a different pilot operated device having a pilot line in fluid communication with the fluid bypass passageway upstream of the pilot operated relief valve. Fluid flowing through a venturi nozzle in the fluid bypass passageway that intersects the fluid exhaust passageway lowers the pressure in the fluid exhaust passageway.
REFERENCES:
patent: 3677295 (1972-07-01), Schultz
patent: 3796232 (1974-03-01), Dalton
patent: 4210065 (1980-07-01), Switzer
patent: RE30517 (1981-02-01), McClocklin
patent: 4351362 (1982-09-01), Solie et al.
patent: 4823550 (1989-04-01), Decker
patent: 4835966 (1989-06-01), Kauss et al.
patent: 4964433 (1990-10-01), Marietta
patent: 5967285 (1999-10-01), Mohan et al.
patent: 55-51103 (1980-04-01), None
Patent Abstracts of Japan, vol. 0040, No. 94 (M-019), Jul. 8, 1980 (English translation of JP 55-51103).
Dwyer Duane D.
Pili Roger R.
Actuant Corporation
Leslie Michael
Look Edward K.
Quarles & Brady LLP
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