Universal fluid coupling assembly with interchangeable fitting members

• US 7,712,797 B2
• Filed: 06/28/2006
• Issued: 05/11/2010
• Est. Priority Date: 10/07/2005
• Status: Active Grant

• Current Assignee: Grundfos Pumps Corporation (POUL DUE Jensen's FOND)
• Original Assignee: Grundfos Pumps Corporation (POUL DUE Jensen's FOND)
• Inventors: Lum, Ken
• Primary Examiner(s): Bochna; David E
• Application Number:
  US11/476,272
• Publication Number:
  US 20070080311A1
• Time in Patent Office: 1,413 Days
• Field of Search: 285/414, 285/412, 285/368, 285/387, 285/388, 285/415
• US Class Current: 285/414
• CPC Class Codes: F16K 27/067 with spherical plugs
• CPC Class Codes: F16K 5/0626 Easy mounting or dismounting means
• CPC Class Codes: F16L 19/025 the pipe ends having integral collars or flanges
• CPC Class Codes: F16L 29/002 joints with taps taps in general F16K5/00

Abstract

An universal fluid coupling assembly is provided that includes a coupler housing that has an inner bore extending along an axis of, and opening onto a mating end of, the coupler housing. The coupler housing has an outer perimeter that includes an outer coupler flange that extends about the outer perimeter and that is located proximate to the mating end. The outer coupler flange has a periphery that follows a predetermined circumferential envelope and that has at least one discontinuity therein to define a blank area in the envelope. The assembly further includes a fitting member with an aperture there through. The aperture has an inner diameter that is smaller than the circumferential envelope of the outer coupler flange. The fitting member is loaded over the outer coupler flange onto the outer perimeter of the coupler housing by orienting the fitting member in a non-orthogonal relation with the coupler housing such that the outer coupler flange passes through the aperture. The circumferential envelope of the outer coupler flange may be generally circular, with the discontinuity including at least one flat cut across a portion of the circumferential envelope to define the blank area.

Claims

1. A fluid coupling assembly, comprising:

a coupler housing having an inner bore that extends along an axis and opens onto a mating end of the coupler housing, the coupler housing having an outer perimeter that includes a coupler flange that extends about the outer perimeter the coupler flange having a periphery that follows a circumferential envelope and has at least one discontinuity to define a blank area in the envelope;

a fitting member with a mounting aperture there through, the mounting aperture having an inner diameter that is smaller than the envelope of the coupler flange, wherein the fitting member is mounted over the coupler flange onto the outer perimeter of the coupler housing by orienting the fitting member in a non-orthogonal relationship with the coupler housing such that the coupler flange passes through the aperture in the fitting member; and

a captive ring loaded over the outer perimeter of the coupler housing, the captive ring being held between the mounting aperture of the fitting member and the outer perimeter of the coupler housing.

2. The assembly of claim 1, the captive ring engaging a back face of the coupler flange and being sealably secured between the coupler flange and fitting member.

3. The assembly of claim 1, wherein the envelope is generally circular and the discontinuity includes at least one flat cut across a portion of the envelope to define the blank area.

4. The assembly of claim 1, wherein the envelope is circular and has a first diameter across a first area that is larger than the inner diameter of the aperture and a diameter across a second area that is smaller than the inner diameter of the aperture.

5. The assembly of claim 1, the captive ring having a cross section with a base portion and a top portion, the base portion fitting over an outer perimeter of the coupler housing and against the coupler flange, the aperture including a rim, the top portion engaging the rim to hold the fitting member on the coupler flange.

6. The assembly of claim 1, wherein the fitting member constitutes one of a flange-type fitting, a union-type fitting, a sweat-type fitting and an NPT-type fitting.

7. The assembly of claim 1, further comprising multiple fitting members, one of the fitting members constituting a flange-type fitting, another of the fitting members constituting one of a threaded union-type fitting, a sweat-type fitting and an NPT-type fitting.

8. The assembly of claim 1, further comprising multiple fitting members, one of the fitting members constituting a threaded union-type coupling, another of the fitting members constituting one of a flange-type coupling, a sweat-type coupling and an NPT-type coupling.

9. The assembly of claim 1, wherein the fitting member has an interior cavity with an open end and with an opposed back wall that includes the aperture there through, the interior cavity being threaded proximate to the open end, the fitting member being loaded over the coupler housing and reoriented in an orthogonal relationship with the coupler housing such that the back wall securely engages the coupler flange when the union member is loaded onto the coupler housing.

10. The assembly of claim 1, wherein the fitting member includes a flange body, the flange body and the aperture extending along a common plane, the flange body being loaded onto the coupler housing with the plane of the flange body oriented at an acute angle to the axis of the coupler housing.

11. The assembly of claim 1, wherein the outer coupler flange is aligned within a coupler plane that is perpendicular to the axis of the coupler housing and the aperture is aligned within a fitting plane, the coupler flange passing through the aperture when the fitting plane is oriented in the non-orthogonal relationship with the coupler plane.

12. The assembly of claim 1, wherein the aperture is centered about a fitting axis and the inner bore is centered about the axis of the coupler housing, the fitting member being oriented such that the fitting axis is aligned at a non-parallel angle to the axis of the coupler housing while loading the fitting member over the coupler flange onto the coupler housing.

13. The assembly of claim 1, wherein the aperture has a larger first bore and a smaller second bore with a lip formed therebetween, the lip receiving and fitting against the coupler flange when the fitting member is loaded onto the coupler housing and oriented in an orthogonal relationship with the coupler housing.

14. The assembly of claim 1, wherein the captive ring is substantially non-compressible and electrically non-conductive, the captive ring being positioned against the coupler flange and interposed between the fitting member and the coupler housing to provide electrical separation between the fitting member and the coupler housing, wherein the fitting member is held against the captive ring.

15. The assembly of claim 1, wherein the captive ring includes an opening therethrough extending along an axis, the captive ring including a base extending axially with respect to the axis and a leg extending radially with respect to the axis, the leg being interposed between the coupler flange and the fitting member.

16. The assembly of claim 1, wherein the captive ring is snapped around the coupler housing and is freely movable with respect to each of the fitting member and the coupler housing.

17. The assembly of claim 1, wherein the captive ring is positioned between the fitting member and the coupler housing such that the captive ring provides complete separation between the fitting member and the coupler housing.

18. The assembly of claim 1, wherein the captive ring is positioned between the fitting member and the coupler housing such that the captive ring extends along an entire axial length of the fitting member between the fitting member and the coupler housing to provide a physical barrier between the fitting member and the coupler housing.

19. The assembly of claim 1, wherein the captive ring has an opening having a diameter that is less than both an outer diameter of the coupler flange and the inner diameter of the fitting member, the captive ring being split to facilitate positioning of the captive ring between the fitting member and the coupler housing.

20. The assembly of claim 1, wherein the captive ring includes a base, a leg extending outward from the base, and a retention barb extending radially outward from the base and spaced apart from the leg, the retention barb and the leg cooperating to retain the fitting member in alignment with the captive ring.

21. A universal fluid coupling assembly, comprising:

a coupler housing having an outer perimeter that includes a coupler flange, the coupler flange having a periphery that follows an envelope and has at least one discontinuity to define a blank area in the envelope;

a flange-type fitting with an aperture there through, the aperture having an inner diameter that is smaller than the envelope of the coupler flange;

a threaded union-type fitting with an aperture there through, that has an inner diameter that is smaller than the envelope of the coupler flange, wherein a selected one of the flange-type and union-type fitting is mounted over the coupler flange onto the outer perimeter of the coupler housing by orienting the selected one of the flange-type and union-type fitting in a non-orthogonal relationship with the coupler housing such that the coupler flange passes through the corresponding aperture; and

a captive ring loaded over the outer coupler flange, the captive ring engaging a back face of the coupler flange and being secured between the selected one of the flange-type and union-type fitting and the coupler flange.

22. The assembly of claim 21, wherein the union-type fitting has an interior cavity with an open end and with an opposed back wall that includes the aperture there through, the interior cavity fitting being threaded proximate to the open end, the union-type fitting being loaded over the coupler housing and reoriented in an orthogonal relationship with the coupler housing such that the back wall securely engages the coupler flange when the union-type fitting is loaded onto the coupler housing.

23. The assembly of claim 21, wherein the flange-type fitting includes a flange body, the flange body and the aperture extending along a common plane, the flange body being loaded onto the coupler housing with the plane of the flange body oriented at an acute angle to the axis of the coupler housing.

24. The assembly of claim 21, wherein the captive ring is a substantially non-compressible and electrically non-conductive captive ring, the captive ring being positioned against the coupler flange and interposed between the coupler housing and the selected one of the flange-type and union-type fitting to provide electrical separation between the coupler housing and the selected one of the flange-type and union-type fining, wherein the selected one of the flange-type and union-type fitting is held against the captive ring.

25. The assembly of claim 21, wherein the captive ring includes an opening therethrough extending along an axis, the captive ring including a base extending axially with respect to the axis and a leg extending radially with respect to the axis, the leg being interposed between the coupler flange and the selected one of the flange-type and union-type fitting.

26. The assembly of claim 21, wherein the captive ring extends along an entire axial length of the selected one of the flange-type and union-type fitting between the coupler housing and the selected one of the flange-type and union-type fitting to provide a physical barrier between the coupler housing and the selected one of the flange-type and union-type fitting.

27. The assembly of claim 21, wherein the captive ring includes a base, a leg extending outward from the base, and a retention barb extending radially outward from the base and spaced apart from the leg, the retention barb and the leg cooperating to retain the selected one of the flange-type and union-type fitting in alignment with the captive ring.

28. A method of configuring a fluid coupling assembly for installation into a fluid distribution system based on a type of mating coupling, the method comprising:

providing a coupler housing having an inner bore that extends along an axis and opens onto a mating end of the coupler housing, the coupler housing having an outer perimeter that includes a coupler flange that extends about the outer perimeter, the coupler flange having a periphery that follows a circumferential envelope and has at least one discontinuity to define a blank area in the envelope;

providing first and second fitting members each having an aperture there through, the apertures each having an inner diameter that is smaller than the circumferential envelope of the coupler flange, the first fitting member constituting one of a union-type fitting, a flange-type fining, a sweat-type fitting and an NPT-type fitting, the second fitting member constituting a different one of the union-type fitting, the flange-type fitting, the sweat-type fitting and the NPT-type fining, wherein both of the first and second fitting members are configured to be used with the coupler housing;

selecting one of the first and second fitting members for use with the coupler housing based on the type of mating coupling to be joined thereto;

mounting the selected one of the first and second fitting members over the coupler flange onto the outer perimeter of the coupler housing by orienting the selected one of first and second fitting members in a non-orthogonal relationship with the coupler housing as the coupler flange passes through the corresponding aperture;

after the selected one of the first and second fitting members is loaded onto the coupler housing, loading a captive ring over the coupler flange; and

drawing the selected one of the first and second fitting members up onto the captive ring to seat the captive ring against the coupler flange and in the corresponding aperture.

29. The method of claim 28, further comprising forming the circumferential envelope to be generally circular and the discontinuity to include at least one flat cut across a portion of the circumferential envelope to define the blank area.

30. The method of claim 28, wherein the selected one of the first and second fitting members is a union-type fitting that has an interior cavity with an open end and with a back wall that includes the aperture therethrough, the union-type fitting being threaded proximate to the open end, the union-type fitting being loaded over the coupler housing such that the back wall securely engages the coupler flange when the union-type fitting is loaded onto the coupler housing and oriented in an orthogonal relationship with the coupler housing.

31. The method of claim 28, further comprising removing, from the coupler housing, the second fitting member which is a flange-type fitting that has a flange body, the flange body and the mounting aperture extending along a plane, the flange body being unloaded from the coupler housing with the plane of the flange body oriented in a non-orthogonal relation with the axis of the coupler housing.

32. The method of claim 28, further comprising, after loading the selected one of the first and second fitting members onto the coupler housing, orienting the selected one of the first and second fitting members and the coupler housing in an orthogonal manner to one another to prevent the selected one of the first and second fitting members from being removed over the coupler flange.

33. The method of claim 28, further comprising removing the first fitting member from the coupler flange and mounting the second fitting member over the outer coupler flange in order to switch between first and second types of fittings.

34. The method of claim 28, wherein said loading a captive ring over the coupler flange further comprises loading a captive ring over the coupler housing that is substantially non-compressible and electrically non-conductive such that the captive ring is positioned against the coupler flange and interposed between the coupler housing and the selected one of the flange-type and union-type fitting to provide electrical separation between the coupler housing and the selected one of the flange-type and union-type fitting.

35. The method of claim 28, wherein said loading a captive ring over the coupler flange further comprises loading a captive ring over the coupler housing, the captive ring having a base extending axially with respect to the axis and a leg extending radially with respect to the axis over the coupler flange;

and

wherein said drawing the selected one of the first and second fitting members up onto the captive ring further comprises drawing the selected one of the first and second fitting members up onto the captive ring such that the leg is interposed between the coupler flange and the selected one of the flange-type and union-type fitting.

36. The method of claim 28, wherein said loading a captive ring over the coupler flange further comprises loading a captive ring over the coupler housing, the captive ring having a base, a leg extending outward from the base, and a retention barb extending radially outward from the base and spaced apart from the leg;

and

wherein said drawing the selected one of the first and second fitting members up onto the captive ring further comprises drawing the selected one of the first and second fitting members up onto the captive ring such that the selected one of the flange-type and union-type fitting is positioned between the leg and the barb to retain the selected one of the flange-type and union-type fitting in alignment with the captive ring.