Screw compressor

Details Screw compressor Screw compressor

2011-01-04

2011-01-04

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Trapped fluid relief

C418S201300

Reexamination Certificate

active

07862314

ABSTRACT:
A screw compressor rotatably accommodates, within a casing including a suction port and a delivery port, a pair of female and male rotors under the meshed state and compresses gas in the state where a liquid is mixed by pouring the liquid to the gas confined within a working chamber formed with both rotors and the casing. On the wall surface of the casing opposing to the rotor delivery end, a recessed part is provided. The working chamber is communicated with the recessed part immediately before isolating from the delivery port and this communication is maintained until a volume of the working chamber substantially becomes zero. Thereby, the screw compressor can be control increase in power consumption, vibration, and noise.

REFERENCES:
patent: 3423017 (1969-01-01), Schibbye et al.
patent: 4560333 (1985-12-01), Fujiwara et al.
patent: 6257855 (2001-07-01), Kameya et al.
patent: 58-131388 (1983-08-01), None
patent: 62-358 (1987-07-01), None
Chinese Office Action of Appln. 200710142405.9 dated Dec. 19, 2008.

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