Thermal expansion valve

Details Thermal expansion valve Thermal expansion valve

1992-10-28

1994-03-29

Tanner, Harry B.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, F25B 4104

Patent

active

052977285

ABSTRACT:
A thermal expansion valve drives a valve body in a housing through a driving member by a gas pressure of a heat sensitive working fluid sealed in a power element, neighboring the housing, by a diaphragm. The driving member holds a heat ballast at its blind hole opened to the working fluid. A diaphragm has a center opening surrounded by a tubular projection, the diaphragm side end portion of the driving member is inserted in the opening, and a diaphragm catch is fitted on the outer periphery of the projection. The catch, the extended end of the projection and the end of the driving member are airtightly welded to each other.

REFERENCES:
patent: 2011379 (1935-08-01), Smith
patent: 3537645 (1970-11-01), Treder
patent: 3817053 (1974-06-01), Orth
patent: 4065939 (1978-01-01), Thornberg et al.
patent: 4979372 (1990-12-01), Tanaka
patent: 5127237 (1992-07-01), Sendo et al.

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