Composite valve seat

Details Composite valve seat Composite valve seat

1982-02-23

1985-04-09

Chambers, A. Michael

Valves and valve actuation

Valve

Seats

251368, 291567A, 428548, 123188S, F01L 300

Patent

active

045097224

ABSTRACT:
A composite valve seat has a valve spot surface zone made of a second sintered alloy which is a special sintered alloy and the remainder of the valve seat is made of a first sintered alloy which is an ordinary low-alloyed sintered alloy. A boundary between the first and second sintered alloys describes a curve which is, with the valve spot surface oriented upward, highest at an outer peripheral surface of the valve seat. The curved boundary gradually falls toward an inner peripheral surface of the valve seat and the shape of the curved boundary is similar to the powder rest curve of the first sintered alloy.

REFERENCES:
patent: 2753858 (1956-07-01), Honeyman et al.
patent: 2753859 (1956-07-01), Bartlett
patent: 3373003 (1968-03-01), Schreiner
patent: 3391444 (1968-07-01), Haller
patent: 3428035 (1969-02-01), Stefan et al.
patent: 3770332 (1973-11-01), Dunn
patent: 3795511 (1974-03-01), Niimi et al.
patent: 4217875 (1980-08-01), Elsbett et al.
patent: 4346684 (1982-08-01), Vossieck

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