Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1993-09-27
1996-02-20
Bertsch, Richard A.
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
417310, F04B 4902
Patent
active
054924502
ABSTRACT:
A control valve for a variable rotary vane compressor is modular. The control operates an actuator to vary the position of a rotary valve plate located between the intake chamber and the compression chamber. The control valve locates in a cavity which has a suction pressure portion, a control pressure portion, and a discharge pressure portion. The control valve has an end cap and a valve seat member connected together by a sleeve. A valve element engages a seat in the valve seat member. The spring and a bias pin urge the valve element to the closed position. A bellows located within the sleeve has a stem that contacts the valve element to move it off of the seat. The sleeve allows the distance between the valve seat member and the end cap to be varied to preset the bellows prior to installation in the compressor.
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patent: 5145327 (1992-09-01), Nakajima et al.
patent: 5364235 (1994-11-01), Bearint
Bearint David E.
Miller James I.
Bertsch Richard A.
Bradley James E.
Wicker William
Zexel USA Corporation
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