Seals

Details Seals Seals

1981-05-11

1982-11-09

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 53, 277216, F16J 916

Patent

active

043581200

ABSTRACT:
The invention relates to piston ring seals. In such seals, manufacturing tolerances, distortions, or wear of the ring itself, or of the sealing surface which it contacts can cause out-of-roundness which produces areas of non-contact between the two components of the seal allowing leakage. The present invention overcomes this problem by providing the piston ring (12) FIG. 3, with a plurality of resilient, tightly packed bristles (18) which are contained within the circumference of the ring where the ring circumference contacts the corresponding sealing surface (5) but which can spring out into contact with the sealing surface over areas where the ring loses contact with it. In the example shown, the bristles project both from the radially inner and outer circumferences and are angled in opposite directions to enable the seal to be rotated into position.

REFERENCES:
patent: 2877071 (1959-03-01), Arnot
patent: 3759148 (1973-09-01), Geffroy
patent: 3811690 (1974-05-01), Moriarty
patent: 3917150 (1975-11-01), Ferguson
patent: 4202554 (1980-05-01), Snell
patent: 4331337 (1982-05-01), Cross

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