Thermal expansion valve

Details Thermal expansion valve Thermal expansion valve

1992-10-28

1993-07-20

Tapolcai, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

236 99R, F25B 4104

Patent

active

052286193

ABSTRACT:
A power element-valve housing combined type thermal expansion valve has a diaphragm in an element and a driving member for driving a valve body in a housing by a diaphragm deflection. The diaphragm has a center opening surrounded by a tubular projection, the driving member has an outer flange coaxially supporting the diaphragm and a heat-balance containing blind hold opened to a heat sensitive working fluid in a sealed chamber in the element. A diaphragm catch fits on the projection's periphery and is airtightly welded with a coaxial annular ridge on a supporting surface of the flange to sandwich the diaphragm with the flange.

REFERENCES:
patent: 3537645 (1970-11-01), Treder
patent: 3822563 (1974-07-01), Orth
patent: 4161278 (1979-07-01), Klann et al.
patent: 4542852 (1985-09-01), Orth et al.
patent: 5044170 (1991-09-01), Tanaka
patent: 5044551 (1991-09-01), Tanaka et al.
patent: 5127237 (1992-07-01), Sendo et al.

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