Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Patent
1996-04-09
1997-12-30
Freay, Charles G.
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
417270, 91505, F04B 126
Patent
active
057022356
ABSTRACT:
A capacity control device for variable-capacity compressors with a high-pressure valve portion 36 for opening or closing the communication between the discharge chamber 21 and the crank case 12; a low-pressure valve portion 41 for opening or closing the communication between the suction chamber 20 and the crank case 12; a valve open-close member 35 for opening or closing so as to reverse the open-close relationship between the high-pressure valve portion 36 and the low-pressure valve portion 41 by advancing or retreating; a pressurising chamber 53 for applying pressure to the valve open-close member 35 in a direction that opens the high-pressure valve portion 36 by a wider effective pressure-receiving area than that of the high-pressure valve portion 36. The device is driven with only small actuation forces by an electromagnetic solenoid 50 to open or close a communicating path between the discharge chamber 21 and the pressurising chamber 53 (FIG. 1).
REFERENCES:
patent: 4747754 (1988-05-01), Fujii et al.
patent: 5000666 (1991-03-01), Esaki
patent: 5486098 (1996-01-01), Kimura et al.
Hirota Hisatoshi
Ito Naoyuki
Freay Charles G.
TGK Company, Ltd.
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