Ductile iron roller tappet body and method for making same

Details Ductile iron roller tappet body and method for making same Ductile iron roller tappet body and method for making same

1976-05-07

1978-06-13

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

F01L 114

Patent

active

040942791

ABSTRACT:
A roller tappet includes a central valve lifter body having a bifurcated end. A roller is supported at the bifurcated end and adapted for engagement by the lobes of a cam shaft. The valve lifter body reciprocates within a cylindrical bore defined by a cast iron engine block. The roller tappet body is formed from a ductile iron material thereby decreasing side wall wear and substantially eliminating galling between the valve lifter body and the wall of the cast iron tappet bore.

REFERENCES:
patent: 1528675 (1925-03-01), Libbey
patent: 1551631 (1925-09-01), Bartlett
patent: 1582883 (1926-04-01), Rich
patent: 1649409 (1927-11-01), Jardine
patent: 2682863 (1954-07-01), Line
patent: 2963011 (1960-12-01), Davis
patent: 3122822 (1964-03-01), Kueny
patent: 3124869 (1964-03-01), Behnke
patent: 3149410 (1964-09-01), Dornbos
patent: 3412721 (1968-11-01), Thompson
patent: 3690959 (1972-09-01), Thompson

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