Direct acting hydraulic tappet

Details Direct acting hydraulic tappet Direct acting hydraulic tappet

1992-09-23

1994-01-25

Argenbright, Tony M.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, 74569, F01L 114, F01L 124

Patent

active

052807711

ABSTRACT:
A direct acting hydraulic tappet and a method for making same in which an oil groove and interior structure defining a weld interface are formed in a cup-shaped body by a rolling process, the body is heat treated, a web and hub structure is positioned against the weld interface and the resulting assembly is subjected to a localized, capacitive discharge welding process in the weld interface area. In accordance with the invention, the weld interface is formed to a specific shape to enhance the integrity of the weld. In accordance with a further aspect of the invention, a baffle member can be assembled to the web and hub structure prior to its positioning within the body member.

REFERENCES:
patent: 4465038 (1984-08-01), Speil
patent: 4602409 (1986-07-01), Schaeffler
patent: 4709668 (1987-12-01), Klug et al.
patent: 4745889 (1988-05-01), Speil
patent: 4951619 (1990-08-01), Schaeffler
patent: 5107806 (1992-04-01), Dohring et al.
patent: 5117787 (1992-06-01), Speil

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