Low friction, high durability ringless piston and piston sleeve

Details Low friction, high durability ringless piston and piston sleeve Low friction, high durability ringless piston and piston sleeve

2005-03-29

2008-05-20

Lazo, Thomas E. (Department: 3745)

Expansible chamber devices

With lubricating means

Portion of expansible chamber device includes solid...

C092S169100

Reexamination Certificate

active

07373873

ABSTRACT:
A cylinder liner and ringless piston adapted to be combined therewith in an internal combustion engine are provided that have superior wear resistance, superior scuffing resistance, and superior properties for abating friction loss between the inside surface of the cylinder and the sliding surface of the ringless piston. These embodiments can also include a cylinder liner which has at least some portion of the inner circumferential surface coated with an iron oxide film, a metallic nitride film, or other physical vapor deposition or chemical vapor deposition film, combined with a ringless piston with at least some portion of the exterior surface being coated with a metallic nitride film or other vapor deposition film.

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