Piston assembly

Details Piston assembly Piston assembly

1986-07-03

1989-06-06

Hershkovitz, Abraham

Expansible chamber devices

With lubricating means

Piston has lubricant retaining or conducting means

92187, 92235, 123193P, F01B 3110

Patent

active

048360937

ABSTRACT:
A piston assembly is disclosed which reduces the consumption of a lubricating agent circulated to provide lubrication between the outer sidewall of the piston assembly and the interior sidewall of a bore. This is accomplished by providing at least one aperture in at least one compression ring groove. The aperture is disposed in fluid communication with the interior of a hollow skirt portion of the piston for communicating such lubricating agent gathered in the compression ring groove into the interior of the hollow skirt portion of the piston so that the lubricating agent can return to the crankcase of an operating mechanism.

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