Seal

Details Seal Seal

1995-04-26

1996-09-24

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277207R, 277213, 277235R, 277235A, F16J 1500

Patent

active

055583474

ABSTRACT:
A static seal comprising an envelope of chemically resistant PTFE and a metallic packing ring within the envelope shaped to form cells. The cells may be filled with an inert gas under pressure so that increased loads on the seal may be cushioned.

REFERENCES:
patent: 1160316 (1915-11-01), Paterson
patent: 1731404 (1929-10-01), Wetherill
patent: 2156662 (1939-05-01), Wills
patent: 2580546 (1952-01-01), Hobson, Jr.
patent: 2888540 (1954-03-01), Gratzmuller
patent: 3332566 (1967-07-01), Phillips
patent: 3817540 (1974-06-01), Nicholson
patent: 4451051 (1984-05-01), Nicholson
patent: 4711456 (1987-12-01), Udagawa
patent: 4795174 (1989-01-01), Whitlow
patent: 4948153 (1990-08-01), Takahashi

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