# US 8,770,234 B2 · Hose

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- Number: US 8,770,234 B2
- Document ID: US8770234B2
- Status: Granted
- Kind: B2
- Application number: 12/677,854
- Filed: 2008-09-15
- Published: 2010-12-02
- Granted: 2014-07-08
- Earliest claimed: 2007-09-14
- Assignees: BHP Billiton Petroleum Pty Ltd.
- Applicants: Joel Aron Witz
- Inventors: Joel Aron Witz
- Web page: https://patentgrep.com/patent/US8770234B2

## CPC

- F16L 9/12: of plastics with or without reinforcement (F16L9/16 - F16L9/22 take precedence)
- F16L 11/14: made of rigid material, e.g. metal or hard plastics
- F16L 59/141: {in which the temperature of the medium is below that of the ambient temperature}
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL

## Abstract

A hose comprising a tubular body of flexible material arranged between inner and outer gripping members, wherein at least one of the gripping members is made of a material, especially a composite material, which expands on cooling.

## Claims

### Claim 1

A hose comprising a tubular body of flexible material arranged between an inner elongate gripping member, formed of a material which, on cooling, expands in the longitudinal direction of the gripping member and an outer gripping member made of a material which contracts on cooling, or does not substantially change length on cooling, wherein the inner elongate gripping member is formed of a composite material that comprises a matrix of fibers within a thermoplastic or thermosetting resin.

### Claim 2 (depends on 1)

The hose according to claim 1, wherein the inner and outer gripping members are formed as coils.

### Claim 3 (depends on 1)

The hose according to claim 1, wherein the inner and outer gripping members are helical.

### Claim 4 (depends on 1)

The hose according to claim 1, wherein the tubular body comprises a reinforcing layer and a sealing layer.

### Claim 5 (depends on 1)

The hose according to claim 1, wherein the tubular body comprises a sealing layer arranged between inner and outer reinforcing layers.

### Claim 6 (depends on 4)

The hose according to claim 4, wherein the or each reinforcing layer is wrapped around the inner gripping member.

### Claim 7 (depends on 4)

The hose according to claim 4, wherein there is a plurality of sealing layers wrapped around the inner gripping member.

### Claim 8 (depends on 1)

The hose according to claim 1, further comprising an axial strengthening means.

### Claim 9 (depends on 8)

The hose according to claim 8, wherein the axial strengthening means comprises a tubular braid extending along at least part of the length of the hose.

### Claim 10 (depends on 1)

The hose according to claim 1, further comprising an end fitting secured to each end of the hose.

### Claim 11 (depends on 1)

The hose according to claim 1, wherein the longitudinal CTE range for each gripping member which expands on cooling is from below zero to −4×10−6° K−.