Carburizing ceramic plates for a faucet valve

Details Carburizing ceramic plates for a faucet valve Carburizing ceramic plates for a faucet valve

1990-03-21

1992-02-11

Lowe, James

Coating processes

Interior of hollow article coating

Removing excess coating material

427237, 427249, B05D 722, C23C 1600

Patent

active

050874837

ABSTRACT:
A method of impregnating the surface of a ceramic disk for use in a faucet valve to fill the pores of the ceramic plate and reduce the coefficient of friction between cooperating plates which control the fluid flow through the faucet valve. The plates are impregnated by subjecting the plates to a carburizing gas under heat over an extended period of time. The process causes a carbon matrix to fill the pores of the ceramic plate. Thereafter, the plates are lapped and polished to remove any excess deposits from the plate surface. The process forms a pair of cooperating plates for use in a faucet valve which eliminate sticking or lock-up of the valve assembly.

REFERENCES:
patent: 4110386 (1978-08-01), Yajima et al.
patent: 4267211 (1981-05-01), Yajima et al.
patent: 4303137 (1981-12-01), Fischer
patent: 4334552 (1982-06-01), Blanchard
patent: 4420142 (1983-12-01), Dworak et al.
patent: 4690617 (1987-09-01), Oda et al.
patent: 4966789 (1990-10-01), Knapp et al.

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