Expansion and check valve combination

Details Expansion and check valve combination Expansion and check valve combination

1994-02-14

1996-06-11

Wayner, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

623246, G05D 2700

Patent

active

055248195

ABSTRACT:
This combination expansion valve and check valve (18) includes a valve body (22) having an inlet (24) and a outlet (26). A control-valve (28) is disposed between the inlet and the outlet which controls flow through the valve when refrigerant flow is normal and pressure is higher at the inlet than the outlet. A by-pass conduit (60) is connected between the inlet and the outlet. A check valve (58) is disposed in the by-pass conduit within the valve to block flow through the conduit when the expansion valve is operating and to permit flow through the conduit when flow is reversed.

REFERENCES:
patent: 2148413 (1939-02-01), Labberton et al.
patent: 2321995 (1943-06-01), Cockburn
patent: 2605050 (1952-07-01), MacDougall
patent: 3109444 (1963-11-01), McKee
patent: 3316731 (1967-05-01), Quick
patent: 3461681 (1969-08-01), Smith et al.
patent: 4214698 (1980-07-01), Josefsson
Two connected valves, namely a thermal expansion valve and a check valve, see Section 6 below.

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