Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1998-06-17
2000-05-23
Denion, Thomas
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418270, 137533, 13753317, 13753319, F01C 102
Patent
active
060659483
ABSTRACT:
A scroll compressor has a discharge check valve assembly comprised of a valve and a valve cage. The valve is maintained open within the assembly by the flow of discharge gas from the scroll set during the normal course of compressor operation and is essentially unaffected by momentary gas backflow and/or momentary pressure pulsations that can repetitively occur in the discharge pressure portion of the compressor shell during such operation. At the same time, the valve is quickly responsive to close the discharge port to gas backflow upon compressor shutdown. A dash pot volume, defined between the discharge valve and its cage, is vented to the discharge pressure portion of the compressor shell and is such that the valve is maintained open and does not chatter in the face of momentary gas backflow and/or pressure pulsations yet closes quickly when the compressor shuts down to prevent the backflow of high pressure gas to the scroll set.
REFERENCES:
patent: 55531 (1866-06-01), Peabody
patent: 4820130 (1989-04-01), Eber et al.
patent: 4840545 (1989-06-01), Moilanen
patent: 5451148 (1995-09-01), Matsuzaki et al.
patent: 5466136 (1995-11-01), Yamada et al.
patent: 5494422 (1996-02-01), Ukai et al.
patent: 5533875 (1996-07-01), Crum et al.
American Standard Inc.
Beres William J.
Denion Thomas
Ferguson Peter D.
O'Driscoll William
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