Expansion valve

Details Expansion valve Expansion valve

2005-05-24

2005-05-24

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Removable valve head and seat unit

Retained by bonnet or closure

C137S468000, C236S09200D

Reexamination Certificate

active

06895993

ABSTRACT:
An expansion valve1comprises a piping member10equipped with passages to which refrigerant pipes are connected, and a cassette unit100,the two members being formed as separate units. The cassette unit100comprises a tube member110having a flange portion111,and at the interior of the tube member110are fixed a guide member170,an orifice member180,and a plate member166.The pressure of the gas filled in a gas charge chamber122defined by a lid120and a diaphragm130displaces the diaphragm130, the displacement being transmitted through a stopper member140to a shaft member150.The shaft member150is guided by a guide member170and controls the valve means160inside a valve chamber161.The cassette unit100is inserted to the piping member10and fixed to position by a ring50.Seal members62, 64,and66are equipped to appropriate areas between the cassette unit and the piping member.

REFERENCES:
patent: 3738120 (1973-06-01), Beatenbough
patent: 3785554 (1974-01-01), Proctor
patent: 5127237 (1992-07-01), Sendo et al.
patent: 5826438 (1998-10-01), Ohishi et al.
patent: 6185959 (2001-02-01), Zajac
patent: 6209793 (2001-04-01), Taguchi
patent: 6626365 (2003-09-01), Kobayashi et al.
patent: 0438625 (1991-07-01), None
patent: 0846927 (1998-06-01), None
patent: 0959310 (1999-11-01), None
patent: 1043553 (2000-10-01), None
patent: 08029019 (1996-02-01), None
patent: 08152232 (1996-06-01), None
patent: H08-152232 (1998-06-01), None
patent: H11-351440 (1999-12-01), None
European Search Report dated Nov. 21, 2003.

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