Dual ring piston-ring system with spring ring bias means

Details Dual ring piston-ring system with spring ring bias means Dual ring piston-ring system with spring ring bias means

1986-08-28

1988-08-30

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277141, 277151, 277156, 277163, 277220, F16J 906, F16J 916

Patent

active

047671238

ABSTRACT:
A piston-ring system has two, equal-radius, coaxial, axially-contiguous sealing rings, each ring having a split circumferential offset from the split in the other ring, each split being substantially Z-shaped in a plane normal to the axis of the rings to have a substantially-circumferential, overlappable middle portion. Each ring is urged, at least at the middle portion of its split, radially.

REFERENCES:
patent: 412227 (1889-10-01), Allen
patent: 1391795 (1921-09-01), Safford
patent: 1473446 (1923-11-01), Scott
patent: 2877071 (1959-03-01), Arnot
patent: 2906101 (1959-09-01), McMahon et al.
patent: 3455565 (1969-07-01), Jepsen
patent: 4355519 (1982-10-01), Kercheval et al.

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