Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1986-07-11
1988-10-18
Freeh, William L.
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
417310, F04B 4900, F04B 4902
Patent
active
047783524
ABSTRACT:
An improved variable capacity vane compressor has at least one second inlet port formed in a cylinder for communicating a suction chamber with at least one compression chamber during a suction stroke. An opening control device varies the opening angle of the second inlet port, and has a pressure receiving portion defining a first pressure chamber communicating with a high pressure side, and a second pressure chamber communicating with a low pressure side. The control device is angularly displaceable in response to a difference between a high pressure and a low pressure in the chambers for causing the opening angle of the second inlet port to vary. A pressure control device is responsive to at least one parameter representative of a thermal load on the compressor for varying at least one of the high and low pressures in the first and second pressure chambers.
REFERENCES:
patent: 3381891 (1968-05-01), Bellmer
patent: 3451614 (1969-06-01), Tosh
patent: 3723024 (1973-03-01), Sawai
patent: 4137018 (1979-01-01), Bruchen
patent: 4272227 (1981-06-01), Woodruff
patent: 4395203 (1983-07-01), Takada
patent: 4502850 (1985-03-01), Fwagaki
patent: 4557670 (1985-12-01), Fwagaki
patent: 4621986 (1986-11-01), Sudo
patent: 4726740 (1988-02-01), Suzuki
Diesel Kiki Co. Ltd.
Freeh William L.
LandOfFree
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