# US 2010/0164221 A1 · Pipe Coupling

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- Number: US 2010/0164221 A1
- Document ID: US20100164221A1
- Status: Published application
- Kind: A1
- Application number: 12/733,202
- Filed: 2008-07-23
- Published: 2010-07-01
- Earliest claimed: 2007-08-22
- Inventors: Alexander Rinderhofer
- Web page: https://patentgrep.com/patent/US20100164221A1

## CPC

- F16L 21/022: {used with sleeves or nipples for pipes of the same diameter, or with reduction pieces (F16L21/025 takes precedence)}
- F16L 37/148: {the securing element being flexible (F16L37/144 takes precedence)}
- F16L 47/08: with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL

## Abstract

The invention relates to a pipe coupling, in particular for connecting water-carrying pipes, such as drinking water pipes, sewage pipes, well pipes, etc.

## Claims

### Claim 1

Pipe coupling with the following wall design between an outside wall (12) and an inside wall (14):
a) An outer plastic layer (16) that is reinforced with fibers (16F) and in which the fibers (16F) run primarily in the axial direction of the coupling (10),
b) An inner plastic layer (20) that is reinforced with fibers (20F) and that is overlapped on the ends by the outer plastic layer (16) and in which the fibers (20F) run primarily in the peripheral direction of the coupling (10),
c) A seal (22) in one part that consists of a deformable material, characterized in that
the medium, which flows through the pipe, has no contact with the coupling material.

### Claim 2 (depends on 1)

Pipe coupling according to claim 1, whose outer plastic layer (16), in the axial direction of the coupling (10), has at least 9/10 of the length of the coupling (10).

### Claim 3 (depends on 1)

Pipe coupling according to claim 1, whose inner plastic layer (20), in the axial direction of the coupling (10), has at most 8/10 of the length of the coupling (10).

### Claim 4 (depends on 1)

Coupling according to claim 1, whose seal (22), in the axial direction of the coupling (10), has at most the length of the inner plastic layer (20).

### Claim 5 (depends on 1)

Coupling according to claim 1, whose outer plastic layer (16) has fibers (16F) that primarily extend over the entire length of the outer plastic layer (16) in the axial direction of the coupling (10).

### Claim 6 (depends on 1)

Coupling according to claim 1, whose inner plastic layer (20) has fibers (20F) that extend primarily over at least 360° of the inner plastic layer (20) in the peripheral direction thereof.

### Claim 7 (depends on 1)

Coupling according to claim 1, whose inner plastic layer (20) is a plastic layer that is applied in the winding process.

### Claim 8 (depends on 1)

Coupling according to claim 1, whose seal (22) is bonded to the inner plastic layer (20).

### Claim 9 (depends on 1)

Coupling according to claim 1, whose seal (22) is in one part.

### Claim 10 (depends on 1)

Coupling according to claim 1, in which end sections (10E1, 10E2) of the outer plastic layer (16) have a larger wall thickness (DE) than the sections of the plastic layer (16) in between.

### Claim 11 (depends on 10)

Coupling according to claim 10, in which the wall thickness (DE) of the end sections (10E1, 10E2) of the outer plastic layer (16) is larger than 9/10 of the wall thickness (DK) of the coupling (10) in these end sections (10E1, 10E2).

### Claim 12 (depends on 1, 10)

Coupling according to claim 1 or 10, whose inside wall (14), considered at each of its two end sections, in the axial direction of the coupling (10), has at least one circumferential, annular recess (18E1, 18E2).

### Claim 13 (depends on 12)

Coupling according to claim 12, whose recesses (18E1, 18E2) are formed in-situ during production.

### Claim 14 (depends on 1)

Coupling according to claim 1, in which the fibers (16F) of the outer plastic layer (16) follow the shape of the inside wall (14) at least in the area of the inside wall (14).

### Claim 15 (depends on 1)

Coupling according to claim 1, in which at least one of the plastic layers (16, 20) consists of a hardened, fiber-glass-reinforced polyester resin.