Self-contained hydraulic valve lifter

Details Self-contained hydraulic valve lifter Self-contained hydraulic valve lifter

1985-07-19

1987-05-05

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, F01L 124

Patent

active

046623256

ABSTRACT:
A self-container hydraulic valve lifter includes a lifter body slidably mounted in a lifter case, a free piston slidably mounted between the lifter body and the lifter case, a plunger slidably mounted in the lifter body and dividing an interior portion of the lifter body into a reservoir chamber and a pressure chamber, a check valve for allowing fluid flow from the reservoir chamber to the pressure chamber, and an operating chamber formed between the free piston and the lifter case and communicated with the reservoir chamber in order to decrease the diameter of the pressure chamber in comparison with that of the free piston.

REFERENCES:
patent: 2109815 (1938-03-01), Best
patent: 2833257 (1958-05-01), Lengnick
patent: 3495577 (1970-02-01), Collins
patent: 4402285 (1983-09-01), Arai et al.

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