Contaminant resistant piston seal with energized backup scrapers

Details Contaminant resistant piston seal with energized backup scrapers Contaminant resistant piston seal with energized backup scrapers

1993-09-24

1994-07-12

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 27, 277165, 277188A, F16J 906

Patent

active

053281772

ABSTRACT:
The inner annular surface of a load ring includes a concave contour such that when pressure is applied to the center of the outer surface the elastomer material will flatten out and cause oppositely disposed feet to kick up and radially outwardly and in turn apply increased pressure to backup rings engaging the cylinder wall. The inner surface of the load ring includes oppositely disposed ramp surfaces which slope radially outwardly and towards each other such that fluid pressure on the backup rings or pressure from the load ring feet will move the backup rings into tighter engagement with the cylinder wall for improved sealing and scraping action.

REFERENCES:
patent: 3582094 (1971-06-01), Whittaker
patent: 3614114 (1971-10-01), Traub
patent: 3771801 (1973-11-01), Burke
patent: 3920252 (1975-11-01), Dechavanne
patent: 3990712 (1976-11-01), Dechavanne
patent: 3999767 (1976-12-01), Sievenpiper
patent: 4032159 (1977-06-01), Zitting
patent: 4067584 (1978-01-01), Hunger
patent: 4468041 (1984-08-01), Yoshimura et al.
patent: 4576386 (1986-03-01), Benson et al.
patent: 5088744 (1992-02-01), Oseman

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