Automatic temperature and humidity regulation – Thermostatic – Expanding solid
Patent
1982-09-24
1985-04-09
Tapolcai, William E.
Automatic temperature and humidity regulation
Thermostatic
Expanding solid
236 1222, G05D 2313
Patent
active
045096775
ABSTRACT:
Disclosed is a valve for mixing hot and cold water and providing for accurate outlet temperature control to within .+-.1.degree. C. Valve consists of a hollow body closed at one end and including an internal sleeve located by two annular flanges that define chambers between the sleeve and the body communicating, respectively, with hot and cold water inlets. Each chamber communicates with the interior of the sleeve by a radially directed passageway. A piston slides within the sleeve between a first valve seat formed by a face of a third annular flange extending inwardly of the sleeve above the cold water passageway to close the cold water passageway and leave the hot water passageway open and a second valve seat located at the bottom of the sleeve to close the hot water passageway and leave the cold water passageway open. The cold water passageway communicates directly with the mixing chamber formed in the sleeve and hot water passageway communicates with the mixing chamber via axial passageways formed in the piston. A temperature responsive device is located within the mixing chamber and acts to urge the piston against second valve seat as the temperature of the water in the mixing chamber increases. Movement of the piston between the first and second valve seats is limited to 0.5 mm. The top of the body is closed by a tap head which includes means for controlling the rate of flow of fluid through the outlet and means for regulating the temperature flow in the mixing chamber.
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patent: 3929283 (1975-12-01), Delpla
patent: 3955759 (1976-05-01), Knapp
patent: 4029256 (1977-06-01), Dauga
patent: 4164321 (1979-08-01), Riis
Bendall Brian
Flannery Stephen W.
Meynell Valves Limited
Tapolcai William E.
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