Corrugated expander for piston ring assembly

Details Corrugated expander for piston ring assembly Corrugated expander for piston ring assembly

1984-06-21

1985-09-24

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277141, 267 15, F16J 906

Patent

active

045429073

ABSTRACT:
The annular expander of a piston ring assembly with vertically extending notches each of which is formed on either side of a plurality of circumferentially spaced upstanding tabs projecting from the top and bottom edges of the expander. The tabs, which form the abutments for the inner peripheral edges of upper and lower annular side rails, the outer peripheral edges of which are in sliding contact with a cylinder wall, undergo elastic deformation made possible by the notches when the corresponding side rails are subjected to a strong force received from the cylinder wall owing to piston wobble during reciprocation. The elastic deformation of the tabs assures that the side rails will remain in contact with the cylinder wall at all times during the reciprocation of the piston.

REFERENCES:
patent: 2789872 (1957-04-01), Olson
patent: 2831738 (1958-04-01), Marien et al.
patent: 2877072 (1959-03-01), Pien
patent: 2917353 (1959-12-01), Baumler et al.
patent: 3004811 (1961-10-01), Mayfield
patent: 3580589 (1971-05-01), Prasse et al.

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