Valve unit for water mixing valve

Details Valve unit for water mixing valve Valve unit for water mixing valve

1997-07-23

1999-08-10

Rivell, John

Fluid handling

Systems

Multi-way valve unit

251368, F16K 336, F16K 11074

Patent

active

059343214

ABSTRACT:
In a valve unit 10 for a water mixing valve comprising a stationary disk 11 provided with a hot water inlet, a cold water inlet, and a mixed water discharge outlet, and a rotary disk 12 slidably overlapping the stationary disk, and provided with a mixing chamber, a face 11s, 12s of at least one of the stationary disk 11 and the rotary disk 12, slidable relative to the other, is provided with a hard carbon film 15 with a first intermediate layer 13a made of titanium or chromium and a second intermediate layer 13b made of silicon or silicon carbide being interposed in-between. With the valve unit constituted as above, the hard carbon film having high adhesion strength is formed on the slidable face 11s/12s of the stationary disk 11 or the rotary disk 12, or on both the slidable faces, substantially enhancing resistance-to-wear of the valve unit.

REFERENCES:
patent: 4724169 (1988-02-01), Keem et al.
patent: 4856758 (1989-08-01), Knapp
patent: 4991822 (1991-02-01), Enke
patent: 5100565 (1992-03-01), Fujiwara et al.

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