Rotary expansible chamber devices – Working member has planetary or planetating movement – Adjustable or resiliently biased working member
Reexamination Certificate
2007-12-18
2007-12-18
Denion, Thomas (Department: 3748)
Rotary expansible chamber devices
Working member has planetary or planetating movement
Adjustable or resiliently biased working member
C418S055500
Reexamination Certificate
active
11208719
ABSTRACT:
Disclosed herein is a back pressure apparatus for orbiting vane compressors that is capable of reducing excessive axial force applied to an orbiting vane due to high-pressure refrigerant gas introduced to the lower surface of a vane plate of the orbiting vane. The back pressure apparatus comprises a back pressure chamber formed at the upper surface of a main frame, which is brought into tight contact with the lower surface of a vane plate of an orbiting vane, and a low-pressure gas communication part for allowing the back pressure chamber and an inlet port to communicate with each other therethrough. Consequently, the present invention has the effect of preventing excessive friction between the orbiting vane and the inner surface of a cylinder, preventing damage to the orbiting vane compressor due to the friction, and preventing deterioration of performance of the orbiting vane compressor due to the frictional loss.
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Hwang Seon-woong
Koo In-hwe
Yoo Dong-won
Denion Thomas
Duff Douglas J.
Greenblum & Bernstein P.L.C.
LG Electronics Inc.
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