Bayonet duct coupler assembly for post-tensioned concrete member

Patent metadata

Field	Value
Publication number	US-10634271-B2
Application number	US-201715402826-A
Country	US
Kind code	B2
Filing date	Jan 10, 2017
Priority date	Feb 4, 2016
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A duct coupler assembly includes a female duct coupler, where the female duct coupler is coupled to a first duct segment. The female duct coupler includes a female duct coupler body having an inner surface having an inner diameter and a bayonet slot formed therein. The duct coupler assembly further includes a male duct coupler. The male duct coupler is coupled to a second duct segment. The male duct coupler includes a male duct coupler body having an outer surface having an outer diameter, where the outer diameter is smaller than the inner diameter of the inner surface of the female duct coupler body. The male duct coupler has a bayonet post extending from an outer surface of the male duct coupler body, and the male duct coupler body is positioned within the female duct coupler body such that the bayonet post is positioned within the bayonet slot wherein the male duct coupler is coupled with the female duct coupler.

First claim

The invention claimed is:

1. A duct coupler assembly for use in post-tensioning concrete comprising:
a female duct coupler, the female duct coupler coupled to a first duct segment, the female duct coupler including a female duct coupler body having a longitudinally facing female edge and an inner surface having an inner diameter, the female duct coupler having a bayonet slot; and
a male duct coupler, the male duct coupler coupled to a second duct segment, the male duct coupler including a male duct coupler body having an outer surface having an outer diameter, the outer diameter smaller than the inner diameter of the inner surface of the female duct coupler body, the male duct coupler having a bayonet post extending from an outer surface of the male duct coupler body, the male duct coupler being coupled with the female duct coupler wherein a portion of the male duct coupler body is positioned within the female duct coupler body and the bayonet post is positioned within the bayonet slot, wherein the bayonet post contacts a detent or flat formed in the bayonet slot and wherein the detent or flat retains the bayonet post by elastic tension between the female duct coupler body and the male duct coupler body;
wherein the male duct coupler further comprises a male coupler flange defining a longitudinally facing male edge, the longitudinally facing male edge abutting the longitudinally facing female edge of the female duct coupler when the male duct coupler is coupled with the female duct coupler so as to resist further insertion of the male duct coupler body into the female duct coupler body.

2. The duct coupler assembly of claim 1 , wherein the female duct coupler further comprises an inner flange, the inner flange positioned within the female duct coupler body, the inner flange and female duct coupler body defining a seal groove therebetween, the seal groove being capable of receiving a male edge of the male duct coupler body.

3. The duct coupler assembly of claim 2 , further comprising a seal positioned within the seal groove.

4. The duct coupler assembly of claim 1 , wherein the female duct coupler is coupled to the first duct segment and the male duct coupler is coupled to the second duct segment by press fitting, mechanical welding, chemical welding, friction welding, thermal coupling, thermal welding, a shrink sleeve, an O-ring or diametric seal, or an adhesive.

5. The duct coupler assembly of claim 4 , wherein the female duct coupler is coupled to the first duct segment and the male duct coupler is coupled to the second duct segment by press fitting, chemical welding, friction welding, thermal coupling, thermal welding, a shrink sleeve, an O-ring or diametric seal, or an adhesive.

6. The duct coupler assembly of claim 1 , wherein the first and second duct segments are duct.

7. The duct coupler assembly of claim 1 , wherein a tensioning member is threaded through the male and female duct couplers.

8. The duct coupler assembly of claim 1 , wherein the female duct coupler and male duct coupler are separably coupleable.

9. The duct coupler assembly of claim 1 , wherein at least one of the duct couplers is formed integrally as an end of the first or second duct segments.

10. The duct coupler of claim 1 , wherein the bayonet slot has a helical path.

11. A duct coupler assembly comprising,
a female duct coupler, the female duct coupler coupled to a first duct segment, the female duct coupler including a female duct coupler body having a longitudinally facing female edge and an inner surface having an inner diameter, the female duct coupler having a bayonet slot; and
a male duct coupler, the male duct coupler coupled to a second duct segment, the male duct coupler including a male duct coupler body having an outer surface having an outer diameter, the outer diameter smaller than the inner diameter of the inner surface of the female duct coupler body, the male duct coupler having a bayonet post extending from an outer surface of the male duct coupler body, the male duct coupler being coupled with the female duct coupler wherein a portion of the male duct coupler body is positioned within the female duct coupler body and the bayonet post is positioned within the bayonet slot;
wherein the male duct coupler further comprises a male coupler flange defining a longitudinally facing male edge, the longitudinally facing male edge abutting the longitudinally facing female edge of the female duct coupler when the male duct coupler is coupled with the female duct coupler so as to resist further insertion of the male duct coupler body into the female duct coupler body;
wherein the first duct segment is positioned within a first concrete element and the second duct segment is positioned within a second concrete element.

12. The duct coupler assembly of claim 11 , wherein the second concrete element is formed about the second duct segment after the second duct segment is coupled to the first duct segment.

13. A method comprising:
forming a first concrete element, the first concrete element having a first duct segment positioned therein and extending from an end of a first concrete element;
positioning a form adjacent to the end of the first concrete element;
providing a duct coupler assembly, the duct coupler assembly including:
a female duct coupler, the female duct coupler including a female duct coupler body having an inner surface having an inner diameter, the female duct coupler having a bayonet slot, the female duct coupler body having a longitudinally facing female edge; and
a male duct coupler, the male duct coupler including a male duct coupler body having an outer surface having an outer diameter, the outer diameter smaller than the inner diameter of the inner surface of the female duct coupler body, the male duct coupler having a bayonet post extending from an outer surface of the male duct coupler body, wherein the male duct coupler further comprises a male coupler flange defining a longitudinally facing male edge;

coupling the female duct coupler of the duct coupler assembly to the first duct segment;
coupling the male duct coupler of the duct coupler assembly to a second duct segment;
coupling the second duct segment to the first duct segment by:
inserting the male duct coupler into the female duct coupler such that the bayonet post enters the bayonet slot, the longitudinally facing male edge abutting the longitudinally facing female edge of the female duct coupler, so as to resist further insertion of the male duct coupler body into the female duct coupler body; and
rotating the second duct segment to retain the bayonet post in the bayonet slot; and

pouring concrete into the form to form a second concrete element having the second duct section positioned therein.

14. The method of claim 13 , wherein the first and second duct couplers are coupled to the first and second duct segments respectively by press fitting, mechanical welding, chemical welding, friction welding, thermal coupling or welding, using a shrink sleeve, using an O-ring or diametric seal, or using one or more adhesives.

15. The method of claim 13 , wherein the step of rotating the second duct segment further comprises locking the male duct coupler to the female duct coupler.

16. The method of claim 13 , wherein the duct coupler assembly further comprises a seal positioned within a seal groove.

17. The method of claim 16 , further comprising sealing the female duct coupler to the male duct coupler.

18. The method of claim 13 , wherein the step of rotating the second duct segment to engage

Assignees

• Sorkin Felix

Inventors

• Sorkin Felix

Classifications

• F16L37/248 Primary

  Bayonet-type couplings · CPC title

• F16L13/00

  Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints ({non-disconnectable pipe joints to walls or other pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of the other pipe F16L41/082;} joints for rigid pipes of plastics F16L47/00) · CPC title

• B21D11/12

  the articles being reinforcements for concrete · CPC title

• F16L13/116

  for socket pipes · CPC title

• E04C5/10

  Ducts · CPC title