Packing life extender ring

Details Packing life extender ring Packing life extender ring

1994-12-07

1996-04-16

Cummings, Scott W.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277190, 277222, 277DIG6, F16J 1520

Patent

active

055075029

ABSTRACT:
A packing life extender ring assembly which includes a first annular ring and a second annular ring concentrically encircling the first ring, both rings having tapered surfaces matingly engaging one another. The first and second rings are both made of a composition containing 60% to 85% by weight virgin polytetrafluoruethylene, the remainder being calcium metasilicate.

REFERENCES:
patent: 3588125 (1971-06-01), Mastromatteo
patent: 4230325 (1980-10-01), Butler et al.
patent: 4489916 (1984-12-01), Stevens
patent: 4558874 (1985-12-01), Williams et al.
patent: 4849379 (1989-06-01), Thoman, Jr.
patent: 5087057 (1992-02-01), Kurkowski
patent: 5272198 (1993-12-01), Kaminski et al.
patent: 5346939 (1994-09-01), Moren et al.

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