Continuous pour concrete slip dowel

• US 8,291,662 B2
• Filed: 01/06/2011
• Issued: 10/23/2012
• Est. Priority Date: 01/06/2010
• Status: Expired due to Fees

• Current Assignee: TDJ Masonry, Inc.
• Original Assignee: TDJ Masonry, Inc.
• Inventors: McCorkle, Dale
• Primary Examiner(s): Wendell, Mark
• Application Number:
  US12/986,040
• Publication Number:
  US 20120011794A1
• Time in Patent Office: 656 Days
• Field of Search: 523/960.2, 523/93, 523/960.4, 523/960.5, 523/960.8
• US Class Current: 52/396.02
• CPC Class Codes: E04B 1/483 Shear dowels to be embedded in concrete

Abstract

According to one non-limiting embodiment of the present invention, a continuous pour concrete slip dowel is disclosed configured for use across a joint between adjacent concrete slabs. The continuous pour concrete slip dowel of the invention includes a slip sleeve configured to be positioned within a first concrete slab, and a main dowel rod having i) a first rod end portion configured to be received within the slip sleeve, ii) a second opposed rod end configured to be received within a second concrete slab which is adjacent the first slab and spaced from the first slab by a intervening joint, and iii) an intermediate coupling rod portion connecting the first rod end with the second rod end, wherein the coupling rod portion defines an offset therein whereby the coupling rod portion is configured to extend around the joint.

Claims

1. A continuous pour concrete slip dowel formed of a main dowel rod configured to extend across a joint comprising:

i) a first rod end configured to be received within a first concrete slab on one side of a joint,

ii) a second opposed rod end configured to be received within a second concrete slab which is adjacent the first slab and spaced from the first slab by the intervening joint,

iii) an intermediate coupling rod portion connecting the first rod end with the second rod end, wherein the intermediate coupling rod is integral with the first rod portion and with the second rod portion, and wherein the coupling rod portion defines an offset therein whereby the coupling rod portion is configured to extend around the joint;

iv) a sliding mechanism that is associated with at least the first rod end of the dowel and is configured to provide a sliding relationship between the first rod end and the concrete slab.

2. The continuous pour concrete slip dowel of claim 1 wherein the intermediate coupling rod portion connecting the first rod end with the second rod end is formed as a U-shaped intermediate coupling rod.

3. The continuous pour concrete slip dowel of claim 2 wherein the first and second ends of the rod are positioned at a height roughly ½

of the height of the associated slabs.

4. The continuous pour concrete slip dowel of claim 2 wherein the rod is formed of ½

inch diameter steel rebar member with projections on an outer surface thereof.

5. The continuous pour concrete slip dowel of claim 4 wherein sliding mechanism is formed of a slip sleeve configured to be positioned within a first concrete slab and wherein the first rod end portion configured to be received within the slip sleeve.

6. The continuous pour concrete slip dowel of claim 2 wherein sliding mechanism is formed of a smooth exterior on the first rod end and a coating on the first end which is coated to prevent attachment of the concrete during setting.

7. The continuous pour concrete slip dowel of claim 6 wherein the coating is one of tar, pitch, grease, and petroleum gels.

8. The continuous pour concrete slip dowel of claim 2 wherein the first and second ends of the rod are parallel to each other.

9. The continuous pour concrete slip dowel of claim 8 wherein the first and second ends of the rod are co-axial.

10. A continuous pour concrete slip dowel formed of a main dowel rod configured to extend across a joint comprising:

i) a first rod end having a smooth exterior and configured to be received within a first concrete slab on one side of a joint,

ii) a second opposed rod end configured to be received within a second concrete slab which is adjacent the first slab and spaced from the first slab by the intervening joint,

iii) an intermediate coupling rod portion connecting the first rod end with the second rod end, wherein the intermediate coupling rod is integral with the first rod portion and with the second rod portion, and wherein the coupling rod portion defines an offset therein whereby the coupling rod portion is configured to extend around the joint; and

iv) a coating on the first end to prevent attachment of the concrete of the first slab during setting thereby providing a sliding relationship between the first rod end and the concrete slab.

11. The continuous pour concrete slip dowel of claim 10 wherein the coating is one of tar, pitch, grease, and petroleum gels.

12. The continuous pour concrete slip dowel of claim 10 wherein the first and second ends of the rod are parallel to each other.

13. The continuous pour concrete slip dowel of claim 12 wherein the first and second ends of the rod are co-axial.

14. The continuous pour concrete slip dowel of claim 10 wherein the intermediate coupling rod portion connecting the first rod end with the second rod end is formed as a U-shaped intermediate coupling rod.

15. The continuous pour concrete slip dowel of claim 14 wherein the first and second ends of the rod are positioned at a height roughly ½

of the height of the associated slabs.

16. The continuous pour concrete slip dowel of claim 10 wherein the rod is formed of ½

inch diameter steel member.

17. A continuous pour concrete slip dowel comprising

A) a slip sleeve configured to be positioned within a first concrete slab;

and

B) a main dowel rod having

i) a first rod end portion configured to be received within the slip sleeve,

ii) a second opposed rod end configured to be received within a second concrete slab which is adjacent the first slab and spaced from the first slab by a intervening joint, and

iii) an intermediate coupling rod portion connecting the first rod end with the second rod end, wherein the intermediate coupling rod is integral with the first rod portion and with the second rod portion, and wherein the coupling rod portion defines an offset therein whereby the coupling rod portion is configured to extend around the joint.

18. The continuous pour concrete slip dowel of claim 17 wherein the intermediate coupling rod portion connecting the first rod end with the second rod end is formed as a U-shaped intermediate coupling rod.

19. The continuous pour concrete slip dowel of claim 18 wherein the first and second ends of the rod are positioned at a height roughly ½

of the height of the associated slabs.

20. The continuous pour concrete slip dowel of claim 18 wherein the rod is formed of ½

inch diameter steel rebar member with projections on an outer surface thereof.