Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1989-02-27
1989-09-26
Freeh, William L.
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
417310, F04B 4902, F04C 2908
Patent
active
048696528
ABSTRACT:
A variable capacity vane compressor having compression spaces defined between a cylinder and a rotor at diametrically opposite locations. A control element rotatably arranged in the cylinder, which has two cut-out portions circumferentially extending at diametrically opposite locations through which inlet ports and respective corresponding compression spaces are communicatable with each other. The cut-out portions are disposed relative to the respective corresponding compression spaces such that compression commences in each of the compression spaces when a trailing vane passes a forward end edge of a corresponding cut-out portion with respect to the rotation of the rotor. The control element is rotatable between a partial capacity position and a full capacity position for varying the capacity of the compressor. The forward end edge of one cut-out portion associated with one compression space has a circumferentially extending recess formed in a radially inner portion thereof, and a projecting portion formed by a radially outer portion thereof, whereby compression commences in the one compression space at retarded timing as compared with the other compression space when the control elements is in the full capacity position.
REFERENCES:
patent: 4744732 (1988-05-01), Nakajima et al.
patent: 4815945 (1989-03-01), Nakajima et al.
Eitai Kazuo
Inomata Kenichi
Moruta Masaya
Nakajima Nobuyuki
Yamaguchi Toshio
Diesel Kiki Co. Ltd.
Freeh William L.
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