Method of making cooled valves for internal combustion engines a

Details Method of making cooled valves for internal combustion engines a Method of making cooled valves for internal combustion engines a

1978-05-19

1980-03-04

Crane, Daniel C.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

72258, 123 4134, 123 4141, 123188A, B21C 2322

Patent

active

041909410

ABSTRACT:
The invention relates to a method of manufacturing cooled valves for internal combustion engines. From a first cylindrical billet is formed a valve blank by drilling an axial blind bore therein and machining an inner circumferential groove at the blind end portion of said bore. From a second cylindrical billet is machined a cylindrical rod-shaped core and at least two coolant feed and return flow channels, said core being inserted into the bore of said blank. Then said blank and said core are assembled by a hydrostatic extrusion.

REFERENCES:
patent: 1254976 (1918-01-01), Bugatti
patent: 2423203 (1947-07-01), Oldham
patent: 3477112 (1969-11-01), Yerkins
patent: 3716902 (1973-02-01), Pearce
patent: 4080700 (1978-03-01), Muller

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