Tubular Joint

• US 20080315575A1
• Filed: 01/18/2007
• Published: 12/25/2008
• Est. Priority Date: 01/23/2006
• Status: Abandoned Application

• Current Assignee: Saint-Gobain Pam
• Original Assignee: Saint-Gobain Pam
• Inventors: Renard, Philippe, Grojean, Daniel, Vitel, Jean-Pierre
• Application Number:
  US12/161,599
• Publication Number:
  US 20080315575A1
• Time in Patent Office: Days
• US Class Current: 285/80
• CPC Class Codes: F16L 17/035 the sealing rings having two lips parallel to each other
• CPC Class Codes: F16L 37/0925 with rings which bite into the wall of the pipe

Abstract

The invention concerns a tubular joint comprising an interlocking tip (4) provided with an inner groove (18) for receiving a smooth tip (6) and a sealing liner (8) arranged in the inner groove (18). It also comprises anti-extrusion means (10) adjacent the sealing liner (8) for countering an extrusion of the sealing liner (8) when the latter is subjected to the pressure of a fluid circulating in the tubular joint. The invention is applicable to drinking water distribution pipes.

Claims

1. Tubular joint, of the type comprising

an interlocking tip (4) of a first pipe element, equipped with an inner groove (18) and suitable to receive a smooth tip (6) of a second pipe element and,

a sealing liner (8) arranged in the inner groove (18),

the tubular joint comprising anti-extrusion means (10, 72) adjacent to the sealing liner (8) and suitable for opposing extrusion of the sealing liner (8) when said liner is subjected to the pressure of a fluid circulating in the pipe elements,

characterised in that it comprises at least one locking element (36) arranged adjacent to the anti-extrusion means (10, 72), on the side opposite the sealing liner (8).

2. Tubular joint according to claim 1, characterised in that the anti-extrusion means comprise an anti-extrusion ring (10).

3. Tubular joint according to claim 2, characterised in that the anti-extrusion ring (10) is open and comprises two end portions (53A, 53B) which, in the assembled state in the inner groove (18), overlap circumferentially.

4. Tubular joint according to claim 2, characterised in that the anti-extrusion ring (10) is fixed to the sealing liner (8).

5. Tubular joint according to claim 2, characterised in that the anti-extrusion ring (10) is applied freely on the sealing liner (8).

6. Tubular joint according to claim 2, characterised in that the anti-extrusion means comprise at least two anti-extrusion elements (72) in the form of a ring segment.

7. Tubular joint according to claim 6, characterised in that the anti-extrusion elements (72) are integral with the anti-extrusion ring 10.

8. Tubular joint according to claim 2, characterised in that at least one locking element (36) is fixed to the anti-extrusion ring (10).

9. Tubular joint according to claim 8, characterised in that at least one of the locking elements (36) is fixed releasably to the anti-extrusion ring (10).

10. Tubular joint according to claim 9, characterised in that the locking element (36) is fixed by complementarity of form, in particular by latching, to the anti-extrusion ring (10).

11. Tubular joint according to claim 6, characterised in that the or each locking element (36) is inserted in an interstice (73) formed by the anti-extrusion elements (72), and in that the outer surfaces of at least one locking element (36) and at least one of the anti-extrusion elements (72) are flush.

12. Tubular joint according to claim 2, characterised in that the anti-extrusion ring (10) comprises thrust means (70) suitable for stressing the or each locking element (36) axially away from the sealing liner (8).

13. Tubular joint according to claim 12, characterised in that the thrust means comprise a thrust projection (70) integral with the anti-extrusion ring (10).

14. Tubular joint according to claim 2, characterised in that the sealing liner (8) comprises thrust means, in particular a flexible lip (24) integral with the sealing liner (8), suitable for stressing the or each locking element (36) axially away from the sealing liner (8).

15. Tubular joint according to claim 13, characterised in that the thrust means (70, 24) have a free end turned radially outwards or inwards.

16. Tubular joint according to claim 1, characterised in that it comprises a smooth tip (6) inserted in the interlocking tip (4), the sealing liner (8) being compressed radially between the smooth tip (6) and the interlocking tip (4).