Vane type compressor with fluid pressure biased vanes

Details Vane type compressor with fluid pressure biased vanes Vane type compressor with fluid pressure biased vanes

1985-03-11

1987-03-31

Vrablik, John J.

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

Groove communicates with vane slot

418 93, 418268, F04C 1800, F04C 2902

Patent

active

046539913

ABSTRACT:
The compressor is characterized by a high pressure port provided in a rear plate at a position that the bottom portion of a vane groove of a vane which reaches a delivery port contacts the high pressure port, and low pressure ports provided, independently of the high pressure port, in the front and rear plates at positions so that the low pressure ports communicate with the high pressure port through the bottom portion of the vane groove of the vane between the low and high pressure ports only when the center of said vane groove is disposed between the high and low pressure ports so that the high pressure is fed intermittently to the low pressure port. In a region of rotation of the rotor where vane-tip pressing force is small, a high pressure from the high pressure port is applied to vane grooves as vane back pressure, and in the other region a relatively low pressure is applied thereto from the low pressure ports.

REFERENCES:
patent: 2455297 (1948-11-01), Curtis et al.
patent: 3781145 (1973-12-01), Wilcox
patent: 4071306 (1978-01-01), Calabretta
patent: 4498853 (1985-02-01), Sakamaki et al.

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