Tappet in an internal combustion engine and a method of manufacturing it
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United States of America Patent
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Feb 25, 1997
Grant Date -
N/A
app pub date -
May 6, 1996
filing date -
Nov 16, 1994
priority date (Note) -
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Abstract
A tappet is used in an internal combustion engine of vehicles. 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 smaller toward the end, thereby preventing peaks of the helical groove from exposure to the outside.
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