Self-contained hydraulic lash adjuster

Details Self-contained hydraulic lash adjuster Self-contained hydraulic lash adjuster

1978-02-23

1980-03-04

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, F01L 124

Patent

active

041911423

ABSTRACT:
A self-contained hydraulic lash adjuster, which does not depend upon any external source of hydraulic fluid in operation, is used in the valve trains of internal combustion engines in order to take up the lash or operating clearance in the valve trains. The lash adjuster comprises a cylinder member, a plunger member slidably fitted therein, said cylinder and plunger members defining a fluid pressure chamber between each end wall thereof, said plunger member forming a reservoir chamber therewithin, and an elastic bag member disposed within the reservoir chamber, the inner wall surface of said elastic bag member being normally in communication with atmospheric pressure while the outer wall surface thereof being normally in contact with the fluid in the reservoir chamber.

REFERENCES:
patent: 1062580 (1913-05-01), Bollee
patent: 2109459 (1938-03-01), Best
patent: 2109815 (1938-03-01), Best
patent: 2833257 (1958-05-01), Lengnick
patent: 3495577 (1970-02-01), Collins
patent: 3521608 (1970-07-01), Scheibe
patent: 3670707 (1972-06-01), Guido

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