Fire protection sprinkler with a wrench boss detent and a clip, and method of assembling the fire protection sprinkler

1. A fire protection sprinkler comprising:

(A) a sprinkler body having:

(a) an input orifice at an input end;

(b) a threaded portion at the input end, on an outer surface of the body, the threaded portion being configured to be connected to a fluid conduit to receive a fluid;

(c) an output orifice at an output end;

(d) a pair of frame arms that extend from the output end and form a hub positioned in axial alignment with the output orifice; and

(e) a boss, provided between the input end and the output end, the boss including a circumferential portion having flat edges, and including a cavity on one of the flat edges;

(B) a closure element configured to be held in the output orifice to seal a flow of fluid from the output orifice;

(C) a thermally-responsive element positioned between the closure element and the hub of the frame arms, and configured to releasably retain the closure element in the output orifice; and

(D) a clip having:

(a) a first portion that is engaged with the closure element; and

(b) a second portion configured to be inserted into the cavity on the one of the flat edges of the circumferential portion of the boss of the sprinkler body, and configured to contact the cavity such that, upon actuation of the fire protection sprinkler, the clip rotates about an axis passing through two points of contact between the cavity and the second portion, and moves the closure element away from the sprinkler body to permit flow of the fluid from the output orifice.

2. The fire protection sprinkler of claim 1 , wherein the first portion of the clip engages the closure element resiliently.

3. The fire protection sprinkler of claim 1 , wherein the first portion of the clip comprises first and second arms extending around and engaging at least a portion of the closure element.

4. The fire protection sprinkler of claim 3 , wherein the first and second arms each extend around at least one hundred ten degrees, and up to one hundred eighty degrees, around a periphery of the portion of the closure element.

5. The fire protection sprinkler of claim 1 , wherein the second portion of the clip has a first extension portion that extends in a first direction, away from the first portion of the clip, and a second extension portion that extends from the first extension portion in a second direction that is oblique to the first direction, to engage the cavity of the one of the flat edges of the boss of the sprinkler body.

6. The fire protection sprinkler of claim 5 , wherein the second portion of the clip is shaped to wrap around an edge of the cavity and to extend into the cavity of the one of the flat edges of the boss of the sprinkler body.

7. The fire protection sprinkler of claim 1 , wherein the first portion of the clip lies in a first plane, and the second portion of the clip extends away from the first plane.

8. The fire protection sprinkler of claim 1 , wherein the first portion of the clip forms a ring.

9. The fire protection sprinkler of claim 8 , wherein the ring has a first width about at least a portion of a circumference of the ring, and a second width in a second portion of its circumference, the second width being greater than the first width, and an inner periphery of the ring being substantially a straight line in the second portion of the circumference.

10. The fire protection sprinkler of claim 1 , wherein the first portion of the clip is shaped as a fork.

11. The fire protection sprinkler of claim 1 , wherein the boss of the sprinkler body is a wrench boss.

12. The fire protection sprinkler of claim 11 , wherein the cavity on the one of the flat edges of the circumferential portion of the wrench boss is recessed toward the output orifice so that the second portion of the clip does not protrude past the one of the flat edges of the circumferential portion of the wrench boss.

13. A closure element assembly for a fire protection sprinkler, the closure element assembly comprising:

(A) closure element body configured to be held in an output orifice of the fire protection sprinkler to seal a flow of fluid from the output orifice; and

(B) a clip having:

(a) a first portion that is engaged with the closure element body; and

(b) a second portion configured to be inserted into a cavity on one of flat edges of a circumferential portion of a boss of a sprinkler body of the fire protection sprinkler, and configured to contact the cavity such that, upon actuation of the fire protection sprinkler, the clip rotates about an axis passing through two points of contact between the cavity and the second portion, and moves the closure element away from the output orifice to permit flow of fluid from the output orifice.

14. The closure element assembly of claim 13 , wherein the first portion of the clip engages the closure element resiliently.

15. The closure element assembly of claim 13 , wherein the first portion of the clip comprises first and second arms extending around and engaging at least a portion of the closure element.

16. The closure element assembly of claim 15 , wherein the first and second arms each extend around at least one hundred ten degrees, and up to one hundred eighty degrees, around a periphery of the portion of the closure element.

17. The closure element assembly of claim 13 , wherein the second portion of the clip has a first extension portion that extends in a first direction, away from the first portion of the clip, and a second extension portion that extends from the first extension portion in a second direction that is oblique to the first direction, to engage the cavity of the one of the flat edges of the boss of the sprinkler body.

18. The closure element assembly of claim 17 , wherein the second portion of the clip is shaped to wrap around an edge of the cavity and to extend into the cavity of the one of the flat edges of the boss of the sprinkler body.

19. The closure element assembly of claim 13 , wherein the first portion of the clip lies in a first plane, and the second portion of said clip extends away from the first plane.

20. The closure element assembly of claim 13 , wherein the first portion of the clip forms a ring.

21. The fire protection sprinkler of claim 20 , wherein the ring has a first width about at least a portion of a circumference of the ring, and a second width in a second portion of its circumference, the second width being greater than the first width, and an inner periphery of the ring being substantially a straight line in the second portion of the circumference.

22. The closure element assembly of claim 13 , wherein the first portion of the clip is shaped as a fork.

23. The closure element assembly of claim 13 , wherein the second portion of the clip does not protrude past the one of the flat edges of the circumferential portion of the wrench boss.

24. A method of assembling a fire protection sprinkler, the method comprising:

(A) providing a sprinkler body having:

(a) an input orifice at an input end;

(b) a threaded portion at the input end, on an outer surface of the body, the threaded portion being configured to be connected to a fluid conduit to receive a fluid;

(c) an output orifice at an output end;

(d) a pair of frame arms that extend from the output end and form a hub positioned in axial alignment with the output orifice; and

(e) a boss, provided between the input end and the output end, the boss including a circumferential portion having flat edges, and including a cavity on one of the flat edges;

(B) providing a closure element configured to be held in the output orifice to seal a flow of fluid from the output orifice;

(C) providing a thermally-responsive element positioned between the closure element and the hub of the frame arms, and configured to releasably retain the closure element in the output orifice;

(D) providing a clip having:

(a) a first portion that is resilient and is shaped to engage with the closure element; and

(b) a second portion configured to be inserted into the cavity of the boss of the sprinkler body, and configured to contact the cavity on the one of the flat edges of the circumferential portion of the boss of the sprinkler body such that, upon actuation of the fire protection sprinkler, the clip rotates about an axis passing through two points of contact between the cavity and the second portion, and moves the closure element away from the sprinkler body to permit flow of fluid from the output orifice; and

(E) attaching the clip to the closure element by resiliently fitting the clip to the closure element, and placing the closure element in the output orifice of the sprinkler body to seal the output orifice.

25. The method of claim 24 , wherein the clip is attached to the closure element after the fire protection sprinkler is fully assembled and has passed a hydrostatic test.

26. The method of assembling a fire protection sprinkler of claim 24 , wherein the first portion of the clip engages the closure element resiliently.

27. The method of assembling a fire protection sprinkler of claim 24 , wherein the first portion of the clip comprises first and second arms extending around and engaging at least a portion of the closure element.

28. The method of assembling a fire protection sprinkler of claim 27 , wherein the first and second arms each extend around at least one hundred ten degrees, and up to one hundred eighty degrees, around a periphery of the portion of the closure element.

29. The method of assembling a fire protection sprinkler of claim 24 , wherein the second portion of the clip has a first extension portion that extends in a first direction, away from the first portion of the clip, and a second extension portion that extends from the first extension portion in a second direction that is oblique to the first direction, to engage the cavity of the one of the flat edges of the boss of the sprinkler body.

30. The method of assembling a fire protection sprinkler of claim 29 , wherein the second portion of the clip is shaped to wrap around an edge of the cavity and to extend into the cavity of the one of the flat edges of the boss of the sprinkler body.

31. The method of assembling a fire protection sprinkler of claim 24 , wherein the first portion of the clip lies in a first plane, and the second portion of said clip extends away from the first plane.

32. The method of assembling a fire protection sprinkler of claim 24 , wherein the first portion of the clip forms a ring.

33. The method of assembling a fire protection sprinkler of claim 32 , wherein the ring has a first width about at least a portion of a circumference of the ring, and a second width in a second portion of its circumference, the second width being greater than the first width, and an inner periphery of the ring being substantially a straight line in the second portion of the circumference.

34. The method of assembling a fire protection sprinkler of claim 24 , wherein the first portion of the clip is shaped as a fork.

35. The method of assembling a fire protection sprinkler of claim 24 , wherein the boss of the sprinkler body is a wrench boss.

36. The method of assembling a fire protection sprinkler of claim 24 , wherein the cavity on the one of the flat edges of the circumferential portion of the wrench boss is recessed toward the output orifice so that the second portion of the clip does not protrude past the one of the flat edges of the circumferential portion of the wrench boss.