Vacuum preventing device of scroll compressor

Details Vacuum preventing device of scroll compressor Vacuum preventing device of scroll compressor

2006-03-28

2006-03-28

Solak, Timothy P. (Department: 3746)

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

C417S410500, C418S055100

Reexamination Certificate

active

07018180

ABSTRACT:
A vacuum preventing device of a scroll compressor includes: a chamber formed at one side of a fixed scroll and having a suction pressure hole, a middle pressure hole and a discharge pressure hole communicating with a suction pressure zone, a middle pressure zone and a discharge pressure zone, each formed at a certain portion of an inner circumferential surface; an open and shut member installed inside the chamber and selectively communicating the discharge pressure hole and the suction pressure hole by virtue of a gas pressure of the middle pressure zone and an elastic force of a spring; and a gas leakage preventing unit for preventing a gas leakage in a normal operation by reducing a clearance between an inner wall of the chamber positioned at the side of the discharge pressure hole and the open and shut member.

REFERENCES:
patent: 5236316 (1993-08-01), Iio
patent: 6095765 (2000-08-01), Khalifa
patent: 6190138 (2001-02-01), Hugenroth et al.
patent: 6210120 (2001-04-01), Hugenroth et al.
patent: 6231316 (2001-05-01), Wakisaka et al.
patent: 0385560 (1990-09-01), None
patent: 60182388 (1985-09-01), None
patent: 62067288 (1990-03-01), None
patent: 00/73659 (2000-12-01), None
English Language Abstract of JP 60-182388.
English Language Abstract of JP 62-067288.

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