Tappet roller bearing

Details Tappet roller bearing Tappet roller bearing

1997-01-16

1998-10-06

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Rocker

123 905, 123 9051, F01L 116, F01L 118

Patent

active

058162070

ABSTRACT:
A surface treatment layer for reducing friction is formed either on the outer peripheral surface of the shaft or on the inner peripheral surface of the roller opposed to the outer peripheral surface of the shaft with a small gap between them, wherein surface damages are prevented by the surface treatment layer from occurring on the outer peripheral surfaces immediately after the engine starts and before the engine oil is supplied.

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patent: 5353756 (1994-10-01), Murata et al.
patent: 5427698 (1995-06-01), Hirokawa et al.

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