Duct Coupling Assembly

• US 20070252389A1
• Filed: 04/27/2006
• Published: 11/01/2007
• Est. Priority Date: 04/27/2006
• Status: Abandoned Application

• Current Assignee: DSi (Aalberts NV)
• Original Assignee: Dywidag-Systems International Pty Ltd. (Ningbo Shuanglin Group Co. Ltd.)
• Inventors: Aigner, Erich, Milici, Mark
• Application Number:
  US11/380,603
• Publication Number:
  US 20070252389A1
• Time in Patent Office: Days
• US Class Current: 285/369
• CPC Class Codes: E04C 5/10 Ducts
• CPC Class Codes: F16L 25/0036 Joints for corrugated pipes

Abstract

An assembly for joining ribbed ducts together includes a sleeve having a first section and a second section both sized to receive an end portion of one of the ducts, a pair of bushings, with each bushing sized to fit over the end portion of a corresponding one of the ducts and sized to engage a circumferential rib of the corresponding duct, a pair of seals, with each seal sized to fit within the sleeve and over the end of a corresponding one of the ducts, and a recess disposed adjacent each of the first end and the second end of the sleeve, with each recess sized to snap fit into the sleeve or to receive a tie, to enable the first end and the second end of the sleeve to be secured to the first and second ducts, respectively.

Claims

1. A duct assembly comprising:

a first duct and a second duct, each of the first and second ducts including a longitudinal axis and a plurality of circumferential ribs intermittently spaced along the longitudinal axis;

a sleeve having a first section and a second section, the first section sized to receive an end portion of the first duct and the second section sized to receive an end portion of the second duct;

a pair of bushings, each bushing sized to fit over the end portion of a corresponding one of the first and second ducts, each bushing sized to engage at least a first rib of the corresponding duct and to extend into a corresponding one of the first and second sections of the sleeve;

a pair of seals, each seal sized to fit within the sleeve and over one of the end portions of a corresponding one of the first and second ducts; and

an annular recess disposed adjacent each of the first end and the second end of the sleeve, each recess sized to engage a portion of the corresponding bushing to thereby secure the corresponding ducts in the sleeve.

2. The duct assembly of claim 1, wherein each seal is mounted adjacent a second rib of the corresponding duct.

3. The duct assembly of claim 1, wherein each seal is sized to fit between adjacent circumferential ribs.

4. The duct assembly of claim 1, wherein each seal is formed of a resilient material.

5. The duct assembly of claim 4, wherein the resilient material is closed cell EPDM.

6. The duct assembly of claim 1, wherein each bushing includes an internal recess sized to fit over the first rib.

7. The duct assembly of claim 6, wherein each bushing has a length sized to abut adjacent ribs.

8. The duct assembly of claim 7, wherein each bushing includes angled ends.

9. The duct assembly of claim 1, wherein each bushing includes an outer end and an external recess disposed adjacent the outer end, the external recess located to generally underlie and engage the recess on each of the first and second ends of the sleeve.

10. The duct assembly of claim 1, wherein each seal is sized to be disposed about the corresponding duct and between adjacent circumferential ribs.

11. The duct assembly of claim 1, wherein each recess on the sleeve is adapted to receive a tie to enable the first end and the second end of the sleeve to be secured to the first duct and the second duct, respectively.

12. The duct assembly of claim 11, wherein each duct includes a longitudinal rib, and wherein the each bushing includes a longitudinal cutout positioned to overlie the longitudinal rib.

13. The duct assembly of claim 1, wherein the bushing comprises two identical pieces.

14. The duct assembly of claim 11, wherein each duct includes a longitudinal rib, and wherein the each bushing includes a longitudinal cutout positioned to overlie the longitudinal rib.

15. The duct assembly of claim 14, wherein each bushing comprises a pair of identical bushing pieces, and wherein each bushing piece is sized to fit between adjacent longitudinal ribs.

16. The duct assembly of claim 15, wherein each bushing piece is includes a sloped outer surface.

17. An assembly for coupling a duct to a fitting, the fitting having a flared end and the duct having a plurality of longitudinally spaced circumferential ribs and at least one longitudinal rib, the assembly comprising:

a bushing, the bushing sized to fit over the duct and to extend into the flared end of the fitting;

the bushing having an internal recess sized to engage a first one of the circumferential ribs of the duct;

the bushing having an external recess; and

the external recess of the bushing sized and positioned to engage an inner portion of the flared end to secure the duct to the fitting.

18. The assembly of claim 17, wherein the internal circumferential recess of the bushing is sized in shaped to correspond to an outer contour of the first circumferential rib.

19. The assembly of claim 17, wherein the bushing includes a first section sized to extend to and abut an adjacent circumferential rib.

20. The assembly of claim 19, wherein the bushing includes a second section sized to extend to and abut another adjacent circumferential rib.

21. The assembly of claim 17, wherein the bushing is sized to be disposed between a pair of adjacent circumferential ribs.

22. The assembly of claim 17, wherein the bushing includes a longitudinal cutout sized to receive the longitudinal rib of the duct.

23. The assembly of claim 22, wherein the bushing includes an internal recess sized to receive the circumferential rib.

24. The assembly of claim 17, including a seal sized to fit within the fitting and over the duct;

and wherein the seal is formed of a resilient material and is shaped to overlie a portion of the duct.

25. The assembly of claim 24, wherein the resilient material is EPDM.

26. An assembly for coupling a duct to an anchor comprising:

a duct having a longitudinal axis and a plurality of circumferential ribs intermittently spaced along the longitudinal axis;

a fitting having a first end adapted for attachment to the anchor and a flared second end and having a circumferential recess disposed adjacent the flared second end;

a bushing, the bushing sized to fit over the duct and to extend into the flared end of the fitting;

the bushing having an internal circumferential recess sized to engage a first one of the circumferential ribs, the bushing also including an external circumferential recess;

a seal sized to fit within the fitting; and

a tie sized to extend around the external recess of the fitting in a position to generally overlie the external recess of the bushing and adapted to secure the duct to the fitting.

27. The assembly of claim 26, wherein the internal circumferential recess of the bushing is sized and shaped to correspond to an outer contour of the first circumferential rib, and wherein the seal is sized to fit between an adjacent pair of circumferential ribs.

28. The assembly of claim 26, wherein the bushing includes a first section sized to extend to and abut an adjacent circumferential rib.

29. The assembly of claim 28, wherein the bushing includes a second section sized to extend to and abut another circumferential rib.

30. The assembly of claim 26, wherein the duct includes a plurality of longitudinal ribs, and wherein the bushing is sized to fit between adjacent longitudinal ribs.