Sintered ceramics material and disk valve assembly

Details Sintered ceramics material and disk valve assembly Sintered ceramics material and disk valve assembly

1996-05-15

1998-10-20

Chambers, A. Michael

Valves and valve actuation

Valve

Materials

13762517, 13762541, E03B 100

Patent

active

058235108

ABSTRACT:
A ceramics material for a sliding member used in the water or brought into contact with water is proposed. It is low in frictional resistance and high in wear resistance and shows a long life when used in such a condition. Also, a disk valve assembly is proposed which has a valve body and a valve seat having sliding surfaces that are high in sliding properties. By sliding the valve body on the valve seat having valve holes, the valve holes can be opened and closed. One of the valve seat and the valve body is made of a self-lubricating ceramics material comprising of an oxide ceramic as a main component, and at least one anti-friction agent selected from the group made up of iron, nickel, cobalt and their oxides, nitrides and carbides. The other of the valve seat and the valve body is made of an aluminum oxide ceramics material and has a larger slide contact area than the one of the valve seat and the valve body.

REFERENCES:
patent: 4420142 (1983-12-01), Dworak et al.
patent: 4763876 (1988-08-01), Oda et al.
patent: 4932432 (1990-06-01), Berchem
patent: 4932438 (1990-06-01), Kitamura et al.
patent: 5494258 (1996-02-01), Weissgerber et al.

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