# US 8,783,729 B2 · Coupling system including a safety fastener device

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- Number: US 8,783,729 B2
- Document ID: US8783729B2
- Status: Granted
- Kind: B2
- Application number: 13/874,912
- Filed: 2013-05-01
- Published: 2013-09-19
- Granted: 2014-07-22
- Earliest claimed: 2007-06-11
- Assignees: Turbomeca
- Applicants: Turbomeca
- Inventors: Benoit Michel Bernard Vincent Auzias; Francis Jean Criado; Gerald Andre Charles Senger
- Web page: https://patentgrep.com/patent/US8783729B2

## CPC

- F16L 35/00: Special arrangements used in connection with end fittings of hoses, e.g. safety or protecting devices
- F16L 13/02: Welded joints
- F16L 13/06: with tension-relief of the weld by means of detachable members, e.g. divided tensioning rings, bolts in flanges
- F16L 23/024: characterised by how the flanges are joined to, or form an extension of, the pipes
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL

## Abstract

A coupling system including a coupling for fastening to one end of a pipe via a fastening connection is provided. The coupling system includes a safety fastener device in the form of a sleeve surrounding the fastening connection and having a first end for welding to the pipe, and a hook-forming second end for co-operating with the coupling in such a manner that the hook is suitable for providing fastening between the coupling and the pipe in the event of the fastening connection is damaged.

## Claims

### Claim 1

A coupling system comprising:
a coupling which is fastened to one end of a pipe via a fastening connection, the coupling comprising a cylindrical portion engaging the end of the pipe, wherein said cylindrical portion includes a first annular rib having an outer periphery provided with at least one radially outward projecting lug;
a sleeve surrounding the fastening connection and having a first end welded to the pipe and second end in the form of a ring with its inner periphery provided with at least one radially inward projecting stud placed so as to abut against a respective at least one lug if the fastening connection breaks, the at least one stud provides fastening between the coupling and the pipe in the event of the fastening connection breaking by abutting a respective at least one lug.

### Claim 2 (depends on 1)

A coupling system according to claim 1, wherein the fastening connection is an annular weld.

### Claim 3 (depends on 1)

A coupling system according to claim 1, wherein the periphery of the sleeve is provided with openings enabling an external operator to see the fastening connection when the sleeve is fastened to the pipe.

### Claim 4 (depends on 1)

A coupling system according to claim 1, wherein said cylindrical portion further includes a second annular rib such that the first and second annular ribs define a groove therebetween in which the at least one stud is suitable for engaging so as to retain the sleeve on the coupling before the sleeve is fastened to the pipe.

### Claim 5 (depends on 1)

A coupling system according to claim 1, wherein the at least one stud is a plurality of studs, extend circumferentially, and are circumferentially spaced from one another.

### Claim 6 (depends on 1)

A coupling system according to claim 1, wherein when the fastening connection is not broken, clearance exists between the at least one stud and the respective at least one lug.

### Claim 7 (depends on 6)

A coupling system according to claim 6, wherein said clearance is axial clearance in the axial direction of said cylindrical portion.

### Claim 8 (depends on 6)

A coupling system according to claim 6, wherein the clearance lies in the range 0.1 mm to 0.5 mm.