Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1996-12-23
1998-03-24
Cuda, Irene
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
295274, B23P 1500
Patent
active
057299005
ABSTRACT:
A method of manufacturing a tappet which is used in an internal combustion engine of vehicles is provided. A core material of the tappet has a helical groove on the outer circumferential surface, and a wear resistant coating layer, the ends of which are chamfered. In the vicinity of the end of the core material the helical groove gradually becomes small toward the end, thereby preventing peaks of the helical groove from exposure to the outside.
REFERENCES:
patent: 2467079 (1949-04-01), Corlett
patent: 3058454 (1962-10-01), Goncdlues
patent: 3279446 (1966-10-01), Rappa
patent: 4909198 (1990-03-01), Shiraya et al.
patent: 5228418 (1993-07-01), Doehring
patent: 5280771 (1994-01-01), Groh et al.
Hara Nobuo
Kanzaki Tatsuo
Cuda Irene
Fuji Oozx Inc.
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