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1. (WO2017091439) SPRUNG SEAL RETAINER
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What is claimed is:

1. A valve for controlling fluid flow through pipe elements connected thereto, said valve comprising:

a housing having an inner surface surrounding a central space, a shoulder extending around said inner surface and projecting toward said central space thereby defining a pocket;

a valve closing member mounted within said central space and movable between an open position and a closed position;

a seal positioned within said pocket, said seal engaging said valve closing member when said valve closing member is in said closed position; and

a ring positioned within said central space adjacent to said pocket for retaining said seal therein.

2. The valve according to claim 1, further comprising:

a rim extending around said housing, said rim being positioned adjacent to said pocket and surrounding said central space;

a plurality of dogs positioned in spaced apart relation to one another around said rim and projecting toward said central space;

a plurality of tabs projecting outwardly from an outer perimeter of said ring, said tabs being arranged in spaced apart relation from one another to permit each said tab to pass between two of said dogs for positioning of said ring within said rim, said tabs at least partially overlying said dogs upon rotation of said ring relative to said housing for retaining said ring within said central space.

3. The valve according to claim 2, wherein each one of said tabs comprises a surface oriented angularly with respect to a plane of said ring.

4. The valve according to claim 1, wherein said ring comprises a lip extending about an inner perimeter thereof, said lip projecting out of a plane of said ring toward said seal.

5. The valve according to claim 1, further comprising a plurality of segments attached to one another end to end surrounding said housing and forming a coupling, each said segment having attachment members located at opposite ends, each said segment having arcuate surfaces positioned on opposite sides thereof for engagement with said pipe elements.

6. The valve according to claim 5, wherein said attachment members comprise lugs extending outwardly from opposite ends of each said segment, each said lug defining a hole for receiving a fastener.

7. The valve according to claim 5, wherein said arcuate surfaces project from said segments radially toward said axis.

8. The valve according to claim 5, wherein said plurality of segments comprises no more than two said segments.

9. The valve according to claim 1 , wherein said valve closing member comprises a disk mounted on a valve stem rotatably mounted on said housing.

10. A valve coupling for j oining pipe elements, said valve coupling comprising:

a plurality of segments attached to one another end to end surrounding a central space;

a housing captured between said segments, said housing having an inner surface surrounding said central space, a shoulder extending around said inner surface and projecting toward said central space thereby defining a pocket;

a valve closing member mounted within said central space and movable between an open position and a closed position;

a seal positioned within said pocket, said seal engaging said valve closing member when said valve closing member is in said closed position; and

a ring positioned within said central space adjacent to said pocket for retaining said seal therein.

11. The valve coupling according to claim 10, further comprising:

a rim extending around said housing, said rim being positioned adjacent to said pocket and surrounding said central space;

a plurality of dogs positioned in spaced apart relation to one another around said rim and projecting toward said central space;

a plurality of tabs projecting outwardly from an outer perimeter of said ring, said tabs being arranged in spaced apart relation from one another to permit each said tab to pass between two of said dogs for positioning of said ring within said rim, said tabs at least partially overlying said dogs upon rotation of said ring relative to said housing for retaining said ring within said central space.

12. The valve coupling according to claim 11 , wherein each one of said tabs comprises a surface oriented angularly with respect to a plane of said ring.

13. The valve coupling according to claim 10, wherein said ring comprises a lip extending about an inner perimeter thereof, said lip projecting out of a plane of said ring toward said seal.

14. The valve coupling according to claim 10, further comprising:

attachment members located at opposite ends of each said segment;

arcuate surfaces positioned on opposite sides of each said segment for engagement with said pipe elements.

15. The valve coupling according to claim 14, wherein said attachment members comprise lugs extending outwardly from opposite ends of each said segment, each said lug defining a hole for receiving a fastener.

16. The valve coupling according to claim 14, wherein said arcuate surfaces project from said segments radially toward said axis.

17. The valve coupling according to claim 10, wherein said plurality of segments comprises no more than two said segments,

18. The valve coupling according to claim 10, wherein said valve closing member comprises a disk mounted on a valve stem rotatably mounted on said housing.