Valve lifter and method of producing the same

Details Valve lifter and method of producing the same Valve lifter and method of producing the same

1987-04-30

1989-05-16

Dolinar, Andrew M.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

291567B, F01L 114

Patent

active

048299502

ABSTRACT:
A valve lifter has a cylindrical lifter body portion made of an alloy tool steel which body portion extends in the axial direction of the valve lifter, and a head portion made of the alloy tool steel and formed integrally with the body portion which head portion extends at a right angle to the axis. The head portion has an outer surface constituting a cam-contact surface provided with a coating layer, and an inner surface constituting a valve-pressing portion provided with a valve-pressing protrusion. The head portion has a macrostructure of plastic flow oriented in a direction perpendicular to the above-mentioned axis. Disclosed also is a method for producing this valve lifter.

REFERENCES:
patent: 1848083 (1932-03-01), Wetherald
patent: 1898426 (1933-02-01), Dannell
patent: 2342199 (1944-02-01), Hurtt
patent: 2891525 (1959-06-01), Moore
patent: 4484547 (1984-11-01), Nickerson

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