Roller follower hydraulic tappet

Details Roller follower hydraulic tappet Roller follower hydraulic tappet

1985-05-15

1986-08-26

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, 123 9048, F01L 124

Patent

active

046075992

ABSTRACT:
A hydraulic lash adjusting tappet for an internal combustion engine of the type supplying oil to a passage communicating with the tappet-receiving guide bore in the engine. The tappet has a roller follower on the cam end and a registration means adjacent the opposite end for orienting the roller with respect to the engine cam. The tappet body has at least one localized collector recess disposed longitudinally coincident and peripherally spaced with the registration means. In one embodiment the registration comprises a pair of oppositely disposed flats and the tappet has a pair of diametrically opposed collector recesses interconnected by a peripheral groove spaced longitudinally therefrom to by-pass the flats and provide sufficient surface for leakage control. An oil inlet hole is formed in one of the collector recesses for supplying the lash adjuster valve in the tappet. The localized recess is aligned with the engine supply passage by the orientation of the registration surface.

REFERENCES:
patent: 2765783 (1956-10-01), Randol
patent: 3089472 (1963-05-01), Thompson
patent: 3314303 (1967-04-01), Maat
patent: 4089234 (1978-05-01), Henson et al.
patent: 4361120 (1982-11-01), Kueny
patent: 4448155 (1984-05-01), Hillebrand et al.

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