Piston ring for internal combustion engine

Details Piston ring for internal combustion engine Piston ring for internal combustion engine

1980-05-27

1981-12-22

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

92177, F16J 900, F16J 159, F02F 300

Patent

active

043067301

ABSTRACT:
A piston ring for an oblong piston reciprocating in an oblong cylinder has side portions which merge at one end with a relatively long convex portion. Each side portion also merges with a relatively short convex end portion, respectively. The short convex end portions define a gap between them. Upon installation of the piston ring into a groove on the piston and within the wall of the oblong cylinder, the width of the gap is substantially reduced, thereby to stress the side portions and cause them to reduce pressure variations between the piston ring and the cylinder wall around the periphery of the piston ring. The oblong piston and cylinder may have straight side walls merging with arcuate end walls, or may be substantially elliptical in cross section.

REFERENCES:
patent: 1749894 (1930-03-01), Stanfield
patent: 2302970 (1942-11-01), Melrose
patent: 2766085 (1956-10-01), Moller
patent: 4198065 (1980-04-01), Fukui
patent: 4256067 (1981-03-01), Fukui
patent: 4266787 (1981-05-01), Fukui

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