Inverted bucket tappet with collapsing diaphragm seal

Details Inverted bucket tappet with collapsing diaphragm seal Inverted bucket tappet with collapsing diaphragm seal

1986-08-25

1987-09-22

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, F01L 124

Patent

active

046947906

ABSTRACT:
A self-contained lash adjuster includes a generally cylindrical cup-shaped follower with a closed end and a lash adjuster cartridge assembly mounted by a spacer within the follower. The cartridge assembly includes a reciprocally movable body and a plunger within the body. There is a high pressure chamber defined between the plunger and the body and there is a plunger passage opening into the high pressure chamber. A check valve controls flow through the plunger passage. A diaphragm-type seal is attached at its outer periphery to an interior wall of the follower and at its inner periphery to the movable body. The seal cooperates with the interior wall of the follower and the body to define a fluid reservoir. The spacer mounting the cartridge assembly is positioned within the reservoir and has openings therein connecting the reservoir with the plunger passage.

REFERENCES:
patent: 4368699 (1983-01-01), Kodama
patent: 4392462 (1983-07-01), Lesher
patent: 4590899 (1986-05-01), Kowal et al.

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