Expansion valve

Details Expansion valve Expansion valve

2005-08-30

2005-08-30

Tapolcai, William E. (Department: 3744)

Automatic temperature and humidity regulation

Thermostatic

With pressure control

C062S225000

Reexamination Certificate

active

06935573

ABSTRACT:
An expansion valve1comprises a piping member10having passages to which pipes for refrigerant are connected, and a cassette unit100, which are formed as separate components. The cassette unit100comprises a flange portion111and a tube member110which are welded together, and to the interior of which are fixed a guide member170, an orifice member180and a plate member166. According to the pressure of gas filled in a gas charge chamber122defined by a lid120and a diaphragm130, the diaphragm130is displaced, the movement of which is transmitted through a stopper140to a shaft member150. The shaft member150is guided by a guide member170and drives a valve member160disposed within a valve chamber161. The cassette unit100is inserted to the piping member10and fixed by a ring50. Seal members62, 64, 66are fit to necessary areas.

REFERENCES:
patent: 4979372 (1990-12-01), Tanaka
patent: 5060485 (1991-10-01), Watanabe et al.
patent: 5127237 (1992-07-01), Sendo et al.
patent: 5269459 (1993-12-01), Thompson et al.
patent: 6062484 (2000-05-01), Eybergen
patent: 6112998 (2000-09-01), Taguchi
patent: 6626365 (2003-09-01), Kobayashi et al.
patent: 1043553 (2000-10-01), None
patent: 08-29019 (1996-02-01), None
patent: 08-152232 (1996-06-01), None
patent: 11-351440 (1999-12-01), None
patent: 1262698 (2002-12-01), None
European Search Report dated Mar. 9, 2004.

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