Seal with lip projections

Patent metadata

Field	Value
Publication number	US-10036494-B2
Application number	US-201715719684-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Dec 9, 2015
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

Seals for mechanical couplings and fittings have sealing surfaces with one or more projections that form closable leak paths between the coupling or fitting and pipe elements being joined. The leak paths close when the coupling or fitting is properly installed. Otherwise, the leak paths remain open to ensure that improperly installed couplings and fittings can be discovered during pressure testing and before service pressure is applied.

First claim

What is claimed is:

1. A seal, comprising:
a ring having a peripheral wall extending circumferentially therearound;
a first lobe attached to said peripheral wall, said first lobe extending circumferentially around said ring;
a first sealing surface positioned on said first lobe, said first sealing surface extending circumferentially around said ring;
at least a first projection extending from said first sealing surface, said first projection defining a closeable leak path across said first sealing surface.

2. The seal according to claim 1 , wherein said first lobe comprises a free edge, said first projection being positioned proximate to said free edge.

3. The seal according to claim 1 , wherein said first lobe comprises a free edge, said first projection being positioned distal to said free edge.

4. The seal according to claim 1 , further comprising at least a second projection extending from said first sealing surface, said second projection defining a closeable leak path across said first sealing surface.

5. The seal according to claim 4 , wherein said first lobe comprises a free edge, said first and second projections being positioned proximate to said free edge.

6. The seal according to claim 5 , wherein said first and second projections are positioned adjacent to one another.

7. The seal according to claim 5 , wherein said first and second projections are positioned in spaced relation to one another angularly about said ring.

8. The seal according to claim 7 , wherein said first and second projections are positioned 180° apart from one another.

9. The seal according to claim 4 , wherein said first lobe comprises a free edge, said first and second projections being positioned distal to said free edge.

10. The seal according to claim 9 , wherein said first and second projections are positioned adjacent to one another.

11. The seal according to claim 9 , wherein said first and second projections are positioned in spaced relation to one another angularly about said ring.

12. The seal according to claim 11 , wherein said first and second projections are positioned 180° apart from one another.

13. The seal according to claim 4 , wherein said first lobe comprises a free edge, said first projection being positioned adjacent to said free edge, said second projection being positioned distal to said free edge.

14. The seal according to claim 13 , wherein said first and second projections are positioned adjacent to one another.

15. The seal according to claim 13 , wherein said first and second projections are positioned in spaced relation to one another angularly about said ring.

16. The seal according to claim 15 , wherein said first and second projections are positioned 180° apart from one another.

17. The seal according to claim 1 , wherein said first projection has a convexly curved shape.

18. The seal according to claim 17 , wherein said first projection has a hemispherical shape.

19. The seal according to claim 6 , further comprising third and fourth projections extending from said first sealing surface, said third and fourth projections defining respective closeable leak paths across said first sealing surface.

20. The seal according to claim 19 , wherein said third and fourth projections are positioned adjacent to one another proximate to said free edge.

21. The seal according to claim 19 , wherein said third and fourth projections are positioned adjacent to one another distal to said free edge.

22. The seal according to claim 19 , wherein said third and fourth projections are positioned in spaced relation to said first and second projections angularly about said ring.

23. The seal according to claim 19 , further comprising fifth and sixth projections extending from said first sealing surface, said fifth and sixth projections defining respective closeable leak paths across said first sealing surface.

24. The seal according to claim 23 wherein said fifth and sixth projections are positioned adjacent to one another proximate to said free edge.

25. The seal according to claim 23 , wherein said fifth and sixth projections are positioned adjacent to one another distal to said free edge.

26. The seal according to claim 23 , wherein said fifth and sixth projections are positioned in spaced relation to said third and fourth projections angularly about said ring and said third and fourth projections are positioned in spaced relation to said first and second projections angularly about said ring.

27. The seal according to claim 26 , wherein said fifth and sixth projections are positioned 120° apart from said third and fourth projections and said third and fourth projections are positioned 120° apart from said first and second projections.

28. The seal according to claim 1 , further comprising:
a second lobe attached to said peripheral wall opposite to said first lobe;
a second sealing surface positioned on said second lobe, said second sealing surface extending circumferentially around said ring.

29. The seal according to claim 28 , further comprising at least a second projection extending from said second sealing surface, said second projection defining a closeable leak path across said second sealing surface.

Assignees

• Victaulic Co Of America

Inventors

• Bancroft Philip Wayne
• Bowman Matthew A
• Yovanovich Kathryn E

Classifications

• F16L17/04 Primary

  with longitudinally split or divided sleeve · CPC title

• F16L2201/10

  Indicators for correct coupling · CPC title

• F16L13/148

  specially designed to ensure an intended leakage until correct deformation · CPC title

• F16L2201/30

  Detecting leaks · CPC title

• F16J15/022

  characterised by structure or material · CPC title