US 6,296,021 B1Granted

Leak repair device for rigid pipes

AssigneeSachwin Products, Inc.

InventorWing G. Lew

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Abstract

A leak repair device composed of an elastomeric seal having an outer toroidal portion radially of a central axis and a continuous membrane portion integral with and peripherally enclosed by the toroidal portion. The elastomeric seal is held by a semi-rigid flexible cover member which has a plurality of parallel slots extending across the surface of the cover member. As the cover member is compressed radially against a rigid pipe, the slots permit the cover member to bend to the contour of the pipe. The toroidal portion of the elastomeric seal is compressed against the pipe to seal the leak and the membrane portion encapsulates the leak region to further seal the escape of fluid through the leak repair device.

Claims16

Dependent claims

A leak repair device for rigid pipes comprising:

(a) an elastomeric seal member having a central axis and a radial toroidal outer portion;
(b) a semi-rigid flexible cover member having a peripheral skirt for holding said elastomeric seal member where said semi-rigid flexible cover member is so designed and constructed that upon radial compression of said semi-rigid flexible cover member, said semi-rigid flexible cover member will substantially conform to the curvature of said rigid pipe and where said elastomeric seal member is restrained from lateral displacement by said peripheral skirt during axial compression of said radial toroidal outer portion;
(c) a clamp member associated with said semi-rigid flexible cover member for radially compressing said semi-rigid flexible cover member relative to said rigid pipe thereby axially compressing said radial toroidal outer portion against said rigid pipe to form a seal.

Dependencies are inferred from the claim text.