Pumps – Three or more cylinders arranged in parallel – radial – or... – Condition responsive fluid control
Patent
1983-03-03
1985-10-15
Freeh, William L.
Pumps
Three or more cylinders arranged in parallel, radial, or...
Condition responsive fluid control
417292, 417297, 25112911, 251 82, F04B 128, F04B 4902, F16K 3104
Patent
active
045471339
ABSTRACT:
A variable capacity compressor has a low-pressure chamber, a high-pressure chamber receiving the discharge of some cylinders and a discharge chamber receiving the discharge of other cylinders. An on-off valve between the discharge chamber and low-pressure chamber is actuated by an electric device, such as a servo motor. An electric circuit controls the servo motor so that it is driven for a certain time period in response to a signal to change the compressor capacity. A device operative with the on-off valve moves the valve forward or backward according to the rotation of the servo motor and makes the motor idle when it reaches the fore or back end of movable space. A plunger is inserted in a pressure room which receives the fluid pressure from the high-pressure chamber, and the device for moving the on-off valve is placed in the pressure room so that it directly or indirectly moves the on-off valve and can also operate as an opening or closing device for control of the valve of a connecting port between the high-pressure chamber and the pressure room.
REFERENCES:
patent: 2715992 (1955-08-01), Wilson
patent: 2865557 (1958-12-01), Hartwell
patent: 3535053 (1970-10-01), Jednacz
patent: 4376377 (1983-03-01), Duron
patent: 4403921 (1983-09-01), Kato
patent: 4413955 (1983-11-01), Kato
Nishi Yasuyuki
Nishizawa Kazutoshi
Takagi Masashi
Freeh William L.
Nippondenso Co. Ltd.
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