Ductile iron roller tappet body and method for making same

F - Mech Eng,Light,Heat,Weapons – 01 – L

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26/154, 123/193

F01L 1/14 (2006.01)

Patent

CA 1061667

ABSTRACT OF THE DISCLOSURE A roller tapper 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 tapper body is formed from a ductile iron material thereby decreasing side wall wear and sub- stantially eliminating galling between the valve lifter body and the wall of the cast iron tapper bore.

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