Valve guide and method for making same

Internal-combustion engines – Valve – Valve head cooperates with manifold

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291567R, F01L 308

Patent

active

044845472

ABSTRACT:
A valve guide for the stem of a valve in an internal combustion engine is provided having an inner bore through which the stem of the valve is longitudinally positioned, the inner bore surface of the body being nitrided in order to harden the body about the surface through which the valve stem is slidably positioned. The body is completely formed prior to installation of the body in the engine valve guide bore.

REFERENCES:
patent: 1697083 (1929-01-01), Phillips
patent: 1800340 (1931-04-01), Daisley
patent: 1902676 (1933-03-01), Sutton et al.
patent: 2632235 (1953-03-01), Doyle et al.
patent: 2778352 (1957-01-01), Kimberly
patent: 3428035 (1969-02-01), Stefan et al.
patent: 3497349 (1970-02-01), Eppich
patent: 3809046 (1974-05-01), Kammeraad
patent: 3876475 (1975-04-01), Ramqvist
patent: 3911875 (1975-10-01), Ysberg
patent: 4073474 (1978-02-01), Hashimoto et al.
patent: 4075999 (1978-02-01), Danis
patent: 4122817 (1978-10-01), Matlock
Binder, I. A., "Nitriding the Austenitic Steels Improves Wear Resistance", American Machinist, Sep. 14, 1944, pp. 102-104.

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