Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1985-04-19
1986-04-08
Gluck, Richard E.
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
F04B 4902
Patent
active
045809500
ABSTRACT:
A sliding-vane rotary compressor includes an intake pressure control valve disposed within a cylinder head of the compressor and located between an intake passage for a fluid to be compressed and a low pressure chamber. The control valve comprises a pressure responsive element such as a vacuum bellows or diaphragm actuatable in response to either the pressure in the intake passage or the pressure in the low pressure chamber, a pilot valve connected to the pressure responsive element, a pilot passage adapted to be opened and closed by the pilot valve for developing a difference in pressure, a main or differential piston movable in response to the pressure difference developed, and a throttle mechanism responsive to the movement of the piston for varying the area of an orifice through which the intake passage communicates with the low pressure chamber. The control valve thus constructed is actuatable in immediate response to a change in pressure of a fluid to be compressed and creates a valve-activating force strong enough to reduce the flow of the fluid when the engine r.p.m. is high.
REFERENCES:
patent: 3264842 (1966-08-01), Dobbie
patent: 3994358 (1976-11-01), Smitley
Kato Kagehisa
Sumikawa Seiji
Diesel Kiki Co. Ltd.
Gluck Richard E.
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