Sealing device

Details Sealing device Sealing device

1987-07-15

1989-10-24

Shoap, Allan N.

Expansible chamber devices

Piston

With spring means for biasing side wall portion radially

92201, 92240, 92255, 92258, 277165, 277198, F16J 106

Patent

active

048754056

ABSTRACT:
A sealing device particularly suitable for sealing pistons of working cylinders and for sealing two machine components which can slide against one another is disclosed. A conventional sealing element consisting of low-friction, but not very elastic material, such as PTFE plastic material, and resting on an elastic support, is used. The cross-section of the sealing element in a direction of the sliding motion is U-shaped and encircles the support. The dimensions of the support and the sealing element are determined such that the support exerts prestress forces on the sealing element which try to bend the rim areas of the sealing element outward against the sliding surface for the sealing element. Consequently, an additional force component, directed toward the sliding surface, results for the pressure force which is exerted on the sealing element by the support and functions as a sealing force.

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