Method of forming a groove in a valve seat and the tool used in

Details Method of forming a groove in a valve seat and the tool used in Method of forming a groove in a valve seat and the tool used in

1984-10-23

1986-09-23

Husar, Francis S.

Metal deforming

Tool and/or tool holder

Having unitary tool-face

291571R, B21J 1302

Patent

active

046127950

ABSTRACT:
A tool, used for forming a groove in a valve seat, having a tool main body which has a hardness greater than that of the valve seat, and an end portion with a circumferential surface which has a shape corresponding to the valve seat and is brought into linear or surface contact with the valve seat in an annular shape, and a wire which has a hardness greater than that of the valve seat and which is clamped between a circumferential edge of the valve seat and the end portion of the tool main body so as to cross the circumferential edge of the valve seat, wherein the tool main body is pressed until the circumferential surface of the end portion of the tool main body is brought into linear or surface contact with the valve seat in an annular shape and the movement of the tool main body is stopped, thereby forming an impression of the wire on the valve seat.

REFERENCES:
patent: 1733226 (1929-10-01), Jones
patent: 2215019 (1940-09-01), Smith
patent: 2217194 (1940-10-01), Bryce et al.
patent: 2224670 (1940-12-01), Criley
Singer Controls Division, Rm-303B, (1975), pp. 9-11.

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