Method of manufacturing a tappet in an internal combustion engin

Metal working – Method of mechanical manufacture – Prime mover or fluid pump making

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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.

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