Method of manufacturing hollow engine valve

Details Method of manufacturing hollow engine valve Method of manufacturing hollow engine valve

1990-11-05

1991-10-15

Cuda, Irene

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29888452, 2988846, 123188AA, F02B 7702

Patent

active

050562193

ABSTRACT:
A method of manufacturing a hollow engine valve includes the steps of inserting a core of free-cuting metal into a pipe material of heat-resistant steel to provide a shaping stock, shaping the shaping stock into a rough valve profile of a mushroom shape, subsequently forming a hole in a central portion of said rough valve profile by cutting, and sealingly plugging an open end of the hole close to the valve mushroom portion.

REFERENCES:
patent: 1914786 (1933-06-01), Pirinoli
patent: 2093773 (1937-09-01), Colwell
patent: 2093775 (1937-09-01), Colwell
patent: 2131953 (1938-10-01), Jardine
patent: 2144147 (1939-01-01), Glassford
patent: 2162063 (1939-06-01), Crawford
patent: 2411734 (1946-11-01), Kerwin et al.
patent: 2411764 (1946-11-01), Thoren et al.
patent: 2452636 (1948-11-01), Cummingham et al.
patent: 2627259 (1953-02-01), Wood et al.
patent: 4597367 (1986-07-01), Hayashi
patent: 4862865 (1989-09-01), Dahlen et al.

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