Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Having oscillating or reciprocating valve
Patent
1998-06-03
2000-02-08
Tapolcai, William E.
Automatic temperature and humidity regulation
Mixing fluid of dissimilar temperature
Having oscillating or reciprocating valve
13761417, G05D 2313
Patent
active
060219521
ABSTRACT:
A combination check valve, shutoff and seal cartridge is provided for a thermostatic valve, wherein the thermostatic valve includes hot and cold water inlets communicating with an ON/OFF/volume control and/or diverting water valve. The water output of the water volume control is then plumbed to a tub spout, faucet, showerhead or other plumbing device(s). The thermostatic valve has a body with both the cold water inlet and the hot water inlet, and a mixed temperature water outlet for mixed water of a predetermined temperature. Each inlet has respective ports accepting a corresponding combination check valve shutoff and seal cartridge. The cartridge has a housing with a spring therein. The cartridge housing has a seat element, and a pair of elastomeric stop seals fitted in respective sides of the cartridge housing. The seals seal a fluid flow path to the inner sides of the ports of the thermostatic valve body at the hot and cold water inlets of the thermostatic valve body. In an open position water pressure overcomes the spring force of the spring, pushing the seat element away from a respective seal a predetermined distance to permit entry of cold or hot water therein. In a closed shutoff valve mode, the cartridge housing is rotatable 180 degrees, wherein water inlet pressure creates a force in the same direction as the spring which forces the seat element against the seal, to prevent the flow of hot or cold water therethrough.
REFERENCES:
patent: 2679861 (1954-06-01), Campbell
patent: 3146792 (1964-09-01), Donnelly et al.
patent: 3595474 (1971-07-01), Humpert
patent: 4846221 (1989-07-01), Kanemaru
patent: 4928725 (1990-05-01), Graves
Antoniello Frank
Maxim Alex
IW Industries Inc.
Tapolcai William E.
Walker Alfred M.
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