Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1986-11-14
1989-04-04
Freeh, William L.
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
417310, F04B 4902, F04C 2908
Patent
active
048181897
ABSTRACT:
An improved variable capacity vane compressor comprises at least one second inlet port formed in a rear side block of the cylinder and communicating a suction chamber with at least one of compression chambers on a suction stroke, defined within the cylinder, and an opening angle control device arranged in the rear side block for varying the opening angle of the at least one second inlet port. The opening control device has a pressure receiving portion defining a first pressure chamber supplied with a high pressure and a second pressure chamber supplied with a low pressure, both arranged in the rear side block, and being angularly displaceable in response to a difference between the high pressure and the low pressure for causing the opening angle control device to vary the opening angle of the at least one second inlet port. A pressure control device is arranged in the rear side block and the rear head and 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:
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patent: 3451614 (1969-06-01), Tosh
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patent: 3799707 (1974-03-01), Newton
patent: 4060343 (1977-11-01), Newton
patent: 4272227 (1981-06-01), Woodroff
patent: 4557670 (1985-12-01), Inagaki
patent: 4566869 (1986-01-01), Pandeya
patent: 4726740 (1988-02-01), Suzuki et al.
Diesel Kiki Co. Ltd.
Freeh William L.
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