US 5,118,139 A · Leak repair clamp

Abstract

A leak repair clamp for pipe and pipe flanges providing a segmented frame adapted to receive interchangeable annular segmented inserts. All of the inserts provide for interlocking connection with the frame segments but each insert is adapted to fit around one particular diameter cylindrical surface out of a range of different diameter cylindrical surfaces. By selecting particular sized inserts, a single frame can accommodate a wide range of different diameter pipes and pipe fittings. When the insert segments are interlocked into the frame segments, the frame segments are then integrated by bolting threaded studs through flanges to form a unit, which in combination with two interlocked inserts is fastened around and against the cylindrical surface. Thrust restraining set screws are provided to prevent movement of the metal frame relative to the cylindrical surface the frame is fastened around and against. The leak repair clamp further includes injection valves to permit the injection of the liquid sealant into the annular space enclosed by the pipe and pipe clamp and integraded frame and insert unit.

Claims18

Dependent claims

An improved leak repair clamp comprising a metal frame with a cylindrical bore there through, split into sections parallel relative to the axis of the bore so as to comprise at least two components and a set of interchangeable metal insert assemblies wherein:

(a) said metal frame is provided with means for interlocking connection with two metal insert assemblies coaxially disposed relative to each other, and relative to the metal frame, one insert assembly inside of each end of the bore through said frame;
(b) each metal insert assembly comprises a ring formed of at least two separate segments, each segment adapted at the outside circumference for interlocking connection with said metal frame and each segment provided at the inside circumference with means for sealing against the cylindrical surface;
(c) each set of insert assemblies provides multiple insert assemblies each adapted for sealing against cylindrical surfaces of a different diameter;
(d) said frame is provided with fastener means adapted to forcefully fasten segments of the frame and interlocking insert assemblies together to form the integrated leak repair clamp;
and,
(e) said frame and interlocked insert assemblies adapted for forceful connection around and against the cylindrical surfaces, so that the frame and any two insert assemblies form an annular cavity between said frame and said surfaces.

3 more elements

(a) said metal frame is provided with means for interlocking connection with two metal insert assemblies coaxially disposed relative to each other, and relative to the metal frame, one insert assembly inside of each end of the bore through said frame;
(b) each metal insert assembly comprises a ring formed of at least two separate segments, each segment adapted at the outside circumference for interlocking connection with said metal frame and each segment provided at the inside circumference with means for sealing against the cylindrical surface;
(c) each set of insert assemblies provides multiple insert assemblies each adapted for sealing against cylindrical surfaces of a different diameter;
(d) said frame is provided with fastener means adapted to forcefully fasten segments of the frame and interlocking insert assemblies together to form the integrated leak repair clamp;
(e) said frame and interlocked insert assemblies are adapted for forceful connection around and against the cylindrical surfaces, so that the frame and any two insert assemblies form an annular cavity between said frame and said surfaces;
and,
(f) wherein said clamp is provided with thrust restraining means to prevent any movement of the cylindrical metal frame relative to the cylindrical surfaces the frame is fastened around and against.

4 more elements

An improved leak repair clamp comprising a sleeve with an open bore there through;

said sleeve split, parallel relative to the axis of the bore, so as to comprise two or more components and a set of interchangeable annular insert assemblies wherein;
(a) each insert assembly comprises two or more segments, and wherein each insert assembly is provided with a circular bore and is adapted to fit around and to circumferencially seal against a cylindrical surface of a particular diameter;
(b) the sleeve is adapted to interlockingly connect with any two insert assemblies, one insert at each opening of the bore through the sleeve so that the circular bores of the two insert assemblies will be coaxial with the axis of the bore at each opening of the bore through the sleeve, thereby forming a sleeve independently adaptable at each bore opening to seal against cylindrical surfaces of various diameters;
wherein the interlocking connection means between assemblies and sleeve is comprised of two spaced apart grooves defined in the inner wall of said sleeve;
said grooves disposed circumferencially one inside each open end of said sleeve and, said grooves dovetailed to retain corresponding dovetails provided at the outside circumference of said annular inserts;
and wherein,
(c) the sleeve and insert assembly combination is adapted for forceful connection around and against cylindrical surfaces, forming an annular cavity between said combination and said surfaces.

4 more elements

(a) said metal frame is provided with means for interlocking connection with two metal insert assemblies coaxially disposed relative to each other, and relative to the metal frame, one insert assembly inside of each end of the bore through said frame;
(b) each metal insert assembly comprises a ring formed for at least two separate segments, each segment adapted at the outside circumference for interlocking connection with said metal frame and each segment provided at the inside circumference with means for sealing against the cylindrical surface;
(c) each set of insert assemblies provides multiple insert assemblies each adapted for sealing against cylindrical surfaces of a different diameter;
(d) said frame is provided with fastener means adapted to forcefully fasten segments of the frame and interlocking insert assemblies together to form the integrated leak repair clamp;
(e) said frame and interlocked insert assemblies adapted for forceful connection around and against the cylindrical surfaces, so that the frame and any two insert assemblies form an annular cavity between said frame and said surfaces;
and,
(f) wherein the interlocking connection means between inserts and frame is comprises of
two spaced apart grooves defined in the inner wall of said sleeve,
said grooves disposed circumferencially one inside each open end of said sleeve;
and,
said grooves dovetailed to retain corresponding dovetails provided at the outside circumference of said annular inserts.

8 more elements

Dependencies are inferred from the claim text.

Leak repair clamp

Life of this patent

Leak repair clamp

Life of this patent

Abstract

Claims18