Coil spring supported sealing element and device

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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277163, 277164, 277 31, 267 15, F16J 1512

Patent

active

048099899

ABSTRACT:
An improved sealing device, which when positioned inside a flow conductor and operated, compresses and expands an improved resilient element into fluid sealing engagement between the sealing device and the inside of the flow conductor. The sealing device is provided with centralizing lugs, which automatically extend to centralize the improved resilient element on sealing engagement in the flow conductor, assuring an increased pressure resistant seal. The improved resilient element has end supports including a reinforced coil spring in each end to prevent pressure extrusion of the resilient material and when sealingly engaged, functions as a cup type sealing element. Two forms of wire reinforcement for the coil spring are disclosed, both of which provide further increased resistance to pressure sealed. The improved sealing element may be provided with an outer layer of softer resilient material to assure sealing in rough flow conductors.

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patent: 4509763 (1985-04-01), Fischer

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