Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Reexamination Certificate
2005-03-11
2008-11-18
Kramer, Devon (Department: 3746)
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
C251S129150, C251S129170
Reexamination Certificate
active
07452192
ABSTRACT:
To provide a control valve for a variable displacement compressor using a diaphragm for a pressure-sensing section, which is capable of sensing suction pressure as absolute pressure. A core, a first plunger, and a spring of a solenoid are accommodated in a bottomed sleeve. A diaphragm is welded to an open end of the bottomed sleeve under vacuum atmosphere, whereby an assembly having a vacuum inside is formed. As a result, suction pressure Ps can be sensed as an absolute pressure with reference to a vacuum. The magnetic gap between the first plunger and the core is adjusted by the amount of press-fitting of the core into the bottomed sleeve, and the adjustment of load of the spring incorporated into the bottomed sleeve is made by deforming the bottom of the bottomed sleeve such that it is dented inward.
REFERENCES:
patent: 5165863 (1992-11-01), Taguchi
patent: 6394761 (2002-05-01), Hirota
patent: 6688853 (2004-02-01), Burkett et al.
patent: 2004/0227007 (2004-11-01), Sesser et al.
patent: 2004-278511 (2004-10-01), None
Patent Abstracts of Japan, Publication No. 2000-110731, published on Apr. 18, 2000.
Hamo Patrick
Kramer Devon
TGK Co. Ltd.
Westerman, Hattori, Daniels & Adrian , LLP.
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