Mixing valve with hydraulic responsive movable field

Details Mixing valve with hydraulic responsive movable field Mixing valve with hydraulic responsive movable field

1986-01-03

1988-03-29

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

1376254, 251172, 251174, F16K 11078, F16K 2500

Patent

active

047336943

ABSTRACT:
A mixing valve for a faucet includes a faucet body with a chamber that receives a cartridge. The cartridge has an axially movable bottom section which seats a fixed plate. A movable plate is housed in the cartridge above the fixed plate and is connected to a controlling handle to cooperate with the fixed plate so as to regulate water flow in the mixing proportions. The bottom of the cartridge can axially move and is provided with two seals one operated between the cartridge and the faucet body and the other between the cartridge bottom and fixed plate. The total working area within the seal between the cartridge and faucet is larger than the total working area within the seal between the cartridge and fixed plate so that hydraulic pressure working within these areas finds the hydraulic force which biases the cartridge bottom upward to compress it against the fixed plate and the fixed plate against the movable plate. A spring can be interposed between the cartridge bottom and faucet body to apply a compressive preload onto the valve plates.

REFERENCES:
patent: 3504885 (1970-04-01), Hulsey
patent: 4250912 (1981-02-01), Knapp

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