Sealing ring apparatus

Details Sealing ring apparatus Sealing ring apparatus

1990-07-03

1991-11-19

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 70, 277 75, 277205, 277208, F16J 1510, F16J 1532

Patent

active

050660276

ABSTRACT:
A structure for sealing the gap between two concentric machine parts which are arranged to move relative to each other comprises a sealing ring which is made of a tough-elastic plastic material and which bears upon the contact surface of the second machine part by sealing edges arranged near its ends, the surface of the sealing ring facing the bottom of the groove being provided with an annular groove of substantially trapezoidal cross-section. The space bettween the sealing edges is connected with the bottom of the annular groove by one radial bore. A stressing ring of a rubber-elastic material is arranged in the annular groove, between the sealing ring and the bottom of the groove, which loads the sealing ring in the radial direction and which has an axial cross sectional length smaller than that of the sealing ring. The stressing ring is perfectly fixed by this arrangement relative to the sealing ring. At the same time, the stressing ring and the radial bore form together a valve relieving the sealing ring, while preventing at the same time the sealing from being lifted off, when an over-pressure builds up between the sealing edges.

REFERENCES:
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patent: 2937061 (1960-05-01), Folkerts
patent: 3109661 (1963-11-01), Swaim et al.
patent: 3418001 (1968-12-01), Rentschler et al.
patent: 4331065 (1982-05-01), Fellberg
patent: 4523765 (1985-06-01), Heidemann
patent: 4681327 (1986-10-01), D'Agostino et al.
patent: 4702482 (1987-10-01), Oseman
patent: 4709932 (1987-12-01), Edlund et al.
patent: 4714259 (1987-12-01), Mack et al.
patent: 4723782 (1988-02-01), Muller
patent: 4749201 (1988-06-01), Hunger
patent: 4953876 (1990-09-01), Muller

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