Piston or rod seal

Details Piston or rod seal Piston or rod seal

1990-11-28

1992-01-21

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277176, 277177, F16J 1524

Patent

active

050822950

ABSTRACT:
A piston or rod seal comprising a scraper ring 2 which is made of a PTFE material and supported in a first groove 1 open toward the relatively moving machine part. This ring is pressed against the relatively moving machine part 5 by an O-ring 4 made of an elastomeric material and supported on the bottom 3 of the first groove 1. On the side facing the relatively moving machine part, the scraper ring 2 is bounded by at least two sealing edges 7 separated by a second groove 6 and, on the side facing the O-ring, it is bounded by a conical surface 8. The second groove 6 has a rounded bottom having a radius R which approximately corresponds to the radial depth T of the second groove 6. The conical surface overlaps the radial planes of all sealing edges 7 while avoiding any considerable changes in directions.

REFERENCES:
patent: Re28105 (1974-08-01), Traub
patent: 3909016 (1975-09-01), Traub et al.
patent: 4560174 (1985-12-01), Bisi
patent: 4819952 (1989-04-01), Edlund

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