Compressor unloading valve

Details Compressor unloading valve Compressor unloading valve

2011-01-25

2011-01-25

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

C418S001000, C418S087000, C418S180000, C418S201100, C417S282000, C417S310000, C137S493000, C137S493600, C251S061400

Reexamination Certificate

active

07874820

ABSTRACT:
A compressor apparatus (20) has a housing (22) having first (53) and second (58) ports along a flow path. One or more working elements (26; 28) cooperate with the housing (22) to define a compression path between suction (60) and discharge (62) locations along the flow path. An unloading valve (100) has a valve element (102) having a range between a first condition and a second condition, the second condition being unloaded relative to the first condition. Means (120, 160) bias the valve element toward a third condition intermediate the first and second conditions.

REFERENCES:
patent: 1995561 (1935-03-01), Belanger et al.
patent: 3632231 (1972-01-01), Bloom
patent: 4727725 (1988-03-01), Nagata et al.
patent: 6494699 (2002-12-01), Sjoholm et al.
patent: 2119445 (1983-11-01), None
patent: 02207187 (1990-08-01), None
patent: 02248677 (1990-10-01), None
patent: 05157072 (1993-06-01), None
patent: 09079166 (1997-03-01), None

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