Metallic stem seal with inclined channel and integral support me

Details Metallic stem seal with inclined channel and integral support me Metallic stem seal with inclined channel and integral support me

1995-06-06

1996-11-26

Cummings, Scott

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277213, 277236, F16J 1556

Patent

active

055777422

ABSTRACT:
A valve stem seal comprising a cylindrical stem-sealing membrane and a membrane supporting flange. The membrane has a corrugated profile which defines one or more loop-shaped channels bounded by contact surfaces on a radially inner face and each channel is inclined at 5.degree.-10.degree. with respect to a plane perpendicular to the longitudinal axis. The channels form a labyrinth seal for any fluid leaking along the outer surface of the stem. A support bearing for the stem is provided on the membrane supporting flange.

REFERENCES:
patent: 1773749 (1930-08-01), Petersen
patent: 1840312 (1932-01-01), Dunmire
patent: 2064235 (1936-12-01), Wheeler
patent: 2356947 (1944-08-01), Pranger et al.
patent: 3331608 (1967-07-01), Charrault et al.
patent: 3427034 (1969-02-01), Lowe
patent: 3595588 (1971-07-01), Rode
patent: 4135723 (1979-01-01), Urquhart
patent: 4751965 (1988-06-01), Cassity
patent: 5031923 (1991-07-01), Davies

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