Dowel bar assembly with snap fit side frames

• US 7,314,334 B1
• Filed: 08/03/2006
• Issued: 01/01/2008
• Est. Priority Date: 08/03/2006
• Status: Active Grant

• Current Assignee: Dayton Superior Corporation
• Original Assignee: Dayton Superior Corporation
• Inventors: Bennett, Clifford D., Lee, Kenneth
• Primary Examiner(s): Addie; Raymond W.
• Application Number:
  US11/498,849
• Time in Patent Office: 516 Days
• Field of Search: 404 51- 67
• US Class Current: 404/63
• CPC Class Codes: E01C 11/14 Dowel assembly ; Design or construction of reinforcements in the area of joints coupling devices for prefabricated units E01C5/005; combined with characteristic packings E01C11/08 - E01C11/12; removable holders E01C23/045

Abstract

An apparatus for combining adjacent concrete slabs including a dowel, an end cap, and a side frame. The end cap has a hood defining a curved channel extending at least partially around a dowel receiving end. The side frame has at least one wire received in the curved channel. Also, an end cap having an integrally formed supporting portion including first and second wire supports for supporting substantially parallel side frame cross wires. Also, an end cap including first and second sleeves positioned along opposing tangents of the outer peripheral surface of the end cap for receiving differing portions of a side frame, and further including a resilient protrusion for receiving a further differing portion of the side frame.

Claims

1. An apparatus for combining adjacent concrete slabs comprising:

a dowel for placement into adjacent concrete slabs, said dowel having an end portion;

an end cap including an open end for receiving said dowel end portion, said end cap having a hood extending at least partially around said dowel receiving end of said end cap and aligned transverse to the longitudinal axis of said dowel, said hood defining a first channel extending at least partially around said dowel receiving end of said end cap in a curved path; and

a side frame having at least one wire received in said first channel of said end cap.

2. The apparatus of claim 1 wherein said hood further defines a second channel aligned transverse to the longitudinal axis of said dowel for receiving at least one other wire of said side frame.

3. The apparatus of claim 2 wherein said side frame further comprises:

a plurality of cross wires arranged substantially parallel to each other, wherein at least one cross wire is received inside said second channel of said end cap; and

a curved connection wire coupled to at least one of said cross wires, wherein the curved portion of said curved connection wire is constructed and arranged to be received by said first channel of said end cap.

4. The apparatus of claim 2 wherein said second channel is defined between a first wall and a second wall configured for enabling rotation of the at least one other wire when received by said second channel.

5. The apparatus of claim 1 wherein said first channel is substantially U-shaped.

6. The apparatus of claim 1 wherein said hood further comprises a resilient protrusion extending at least partially across said first channel for coupling said side frame to said end cap.

7. The apparatus of claim 1 wherein the apparatus is stackable upon another such apparatus.

8. The apparatus of claim 1 wherein said end cap further comprises a first section for placing over the end of said dowel bar and a second section including resilient protrusions, wherein said resilient protrusions lockingly engage said first section to said second section.

9. The apparatus of claim 8 wherein said resilient protrusions include gripping ridges to lockingly engage said first section in a plurality of locations longitudinally along the axis of said dowel bar.

10. The apparatus of claim 8 wherein the combination of said first section with said end cap tightens said first section around said dowel bar.

11. The apparatus of claim 8 wherein said end cap further includes a second channel for receiving at least one wire of said side frame.

12. The apparatus of claim 1 wherein said end cap further comprises a first section for placing over said end of said dowel bar and a second section including gripping ridges, wherein said gripping ridges lockingly engage said first section to said second section.

13. An end cap for placing on a dowel, comprising:

a central portion defining a recess for receiving an end of said dowel, said central portion having a first end, a second open end for receiving said end of said dowel, and an outer surface; and

a hood at least partially surrounding said defined recess and defining a first channel extending around at least a portion of the outer surface of said central portion in a bent path.

14. The end cap of claim 13 wherein said hood further defines a second channel aligned transverse to the longitudinal axis of said dowel.

15. The end cap of claim 13 wherein a portion of said hood further includes a resilient protrusion positioned along said first channel.

16. The end cap of claim 13 wherein the surface defining said recess includes ribs.

17. The end cap of claim 16 wherein said ribs have first portions with first heights for engaging the outer surface of said dowel, and second portions with second heights greater than said first heights for engaging said end of said dowel and limiting the insertion of said dowel into said recess.

18. An end cap for incorporation into a dowel bar assembly having a separable side frame, comprising an end cap having:

an open end for receiving an end portion of a dowel bar;

a first hood portion defining a first channel aligned transverse to the longitudinal axis of a received dowel bar and including a resilient protrusion extending at least partially across said first channel for coupling a side frame to said end cap; and

a second hood portion defining a second channel aligned transverse to said longitudinal axis and positioned opposite said first channel across said open end;

wherein a side frame may be, in part, inserted into said second channel and pivotably rotated within said second channel to bring said side frame, in part, into locking engagement with said resilient protrusion within said first channel, whereby a side frame is lockingly assembled into said end cap.