Self-contained lash adjuster with diaphragm-type seal

Details Self-contained lash adjuster with diaphragm-type seal Self-contained lash adjuster with diaphragm-type seal

1985-05-03

1986-11-25

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, F01L 124

Patent

active

046242252

ABSTRACT:
A self-contained lash adjuster has a generally cup-shaped follower and a spacer mounting a lash adjuster cartridge assembly within the follower. The cartridge assembly includes a movable body and a plunger, with a high pressure chamber being defined between the plunger and body. A check valve controls fluid flow through a plunger passage into the high pressure chamber. There is a diaphragm seal which is attached at its outer periphery to an interior wall of the follower and attached at its inner periphery to the movable body. The seal in part defines a fluid reservoir. There is a passage connecting the reservoir with the cartridge assembly. Movement of the body toward the plunger moves fluid from the high pressure chamber to the fluid reservoir, causing a stretching of the diaphragm seal.

REFERENCES:
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: 4397271 (1983-08-01), Gardner

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