Pumps – With condition responsive pumped fluid control – Normally open bypass or relief passage closed by increased...
Patent
1983-03-07
1985-12-10
Freeh, William L.
Pumps
With condition responsive pumped fluid control
Normally open bypass or relief passage closed by increased...
417309, 417310, F04B 4902
Patent
active
045576700
ABSTRACT:
A compressor bypass passage has an inlet portion and an outlet portion which is connected to the suction passage. The inlet portion of the bypass passage has an opening which is able to be open to the compression chamber when the compression chamber is in a decreasing volume stroke, thereby to spill the refrigerant from the compression chamber into the suction passage. A control pressure chamber is formed in the housing. A valve member is arranged in the inlet portion of the bypass passage. The valve member is actuated in response to a variety of pressures of the refrigerant in the control pressure chamber for adjusting the area of the opening of the inlet portion of the bypass passage. A pressure supply passage for supplying a refrigerant, which pressure is higher than the pressure in the suction passage, is connected to the control pressure chamber. A spill passage for spilling a part of the refrigerant interconnects the control pressure chamber to the suction passage. A pressure control valve is arranged in the pressure supply passage or in the spill passage for controlling the pressure in the control pressure chamber.
REFERENCES:
patent: 2657850 (1953-11-01), Borel
patent: 3224662 (1965-12-01), Oldberg
patent: 3676021 (1972-07-01), Wayner
patent: 4080110 (1978-03-01), Szymaszek
patent: 4344297 (1982-08-01), Uero et al.
patent: 4441863 (1984-04-01), Hotta et al.
Inagaki Mitsuo
Ito Seitoku
Kurokawa Yoshiki
Takeda Kenji
Freeh William L.
Nippon Soken Inc.
Nippondenso Co. Ltd.
Olds Theodore
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