# US 4,398,732 A · Sealing ring

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- Number: US 4,398,732 A
- Document ID: US4398732A
- Status: Granted
- Kind: A
- Application number: 06/329,278
- Filed: 1981-12-02
- Granted: 1983-08-16
- Earliest claimed: 1980-05-09
- Assignees: Schionning & Arve' A/S
- Inventors: Jorn Christensen
- Web page: https://patentgrep.com/patent/US4398732A

## CPC

- F16L 21/02: with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00)
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL

## Abstract

A sealing ring of an elastic material is adapted to be applied to the spigot end of a pipe under expansion of the diameter of the ring. To obtain a particularly effective seal without any risk of overloading of the elastic material, neither during insertion into a pipe socket, assembling of the pipes nor later on as a consequence of oblique loads on the pipes, the sealing ring has a sealing member which consists of a hose (1) with a solid compression member (2) which is disposed inside the hose and is connected to the hose (1) through a flap (3). The flap has moreover an elongation (4) which can serve as a finger grip for the application of the sealing ring to the spigot end and counteract twisting of the sealing ring when the pipes are assembled.

## Claims

### Claim 1

A sealing ring of an elastic material, intended to be applied to the spigot end of a pipe under expansion of the ring diameter and subsequent insertion into a pipe socket of an adjoining pipe, said sealing ring consisting of a ring-shaped hose in whose cavity there is provided a solid compression member which is connected to the hose, characterized in that the compression member is connected to the hose through a flap which is short in cross-section so that the compression member is disposed as excentrically as possible with respect to the hose which has a thin collapsible wall, said flap having an elongation that extends beyond the hose.

### Claim 2 (depends on 1)

A sealing ring according to claim 1, characterized in that the hose has been collapsed, e.g. by exhaustion, from its original substantially circular cross-section so as to substantially tightly surround the solid compression member.

### Claim 3 (depends on 1, 2)

A sealing ring according to claim 1 or 2, characterized in that the outer edge of said elongation is provided with a bead-like thickened area.

### Claim 4 (depends on 3)

A sealing ring according to claim 3 characterized in that said bead-like thickened area has substantially the same thickness as the compression member, said elongation of the short flap connected to the compression chamber having approximately the same length as the flap itself.