Control valve assembly for a compressor unloader

Details Control valve assembly for a compressor unloader Control valve assembly for a compressor unloader

2007-04-02

2011-12-06

Ton, Toan (Department: 2889)

Pumps

With condition responsive pumped fluid control

Pump inlet or pump chamber vented to ambient

C137S115130

Reexamination Certificate

active

08070461

ABSTRACT:
A closing element is for a valve assembly of a compressor unloader, the compressor including a casing with a compression chamber, the unloader including a housing defining a chamber. The valve assembly has a base between the compression and unloader chambers, a passage connecting the two chambers, a seat about the passage, and a stem bore within the base having a control chamber. The closing element includes a main body movably disposed within the stem bore and having a sealing surface disposeable against the valve seating surface to obstruct the valve passage and a control end surface within the bore control chamber A sealing member disposed about the main body prevents flow between the control chamber and the valve passage. The main body and/or the sealing member is configured such that the main body is radially moveable to align the body sealing surface with the valve seat.

REFERENCES:
patent: 7270145 (2007-09-01), Koezler
patent: 2002/0141884 (2002-10-01), Sperry
patent: 2004/0007261 (2004-01-01), Cornwell
patent: 2323639 (1998-09-01), None
International Search Report and Written Opinion of the International Searching Authority for Patent Cooperation Treaty Application No. PCT/US2007/08149, dated Jul. 17, 2008, pp. 1-7.

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