Single handle mixing valve with hydraulic responsive piston

Details Single handle mixing valve with hydraulic responsive piston Single handle mixing valve with hydraulic responsive piston

1985-12-03

1988-07-05

Nilson, Robert G.

Fluid handling

Systems

Multi-way valve unit

251172, F16K 1106

Patent

active

047547839

ABSTRACT:
A mixing valve for a faucet includes a faucet body with a chamber that receives a cartridge and a bore that receives a piston. The piston has passageways therethrough in communication with inlets of the body and also in communication to entrances in the cartridge. The piston has a passage leading to a chamber that is interposed between the piston and the body that is responsive to hydraulic pressure from one of the inlets to create a bias that presses against the cartridge and transfers compressive force to a moving valve plate and a fixed valve plate that are within the cartridge. Furthermore, a supplemental spring is interposed within the hydraulic chamber to give mechanical upward bias of the piston against the cartridge.

REFERENCES:
patent: 3556151 (1971-01-01), Masuda
patent: 3923284 (1975-12-01), Stickler
patent: 4250912 (1981-02-01), Knapp
patent: 4610268 (1986-09-01), Knapp
patent: 4676270 (1987-06-01), Knapp et al.

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