Disk plate concrete dowel system

• US 7,381,008 B2
• Filed: 03/31/2006
• Issued: 06/03/2008
• Est. Priority Date: 08/13/2003
• Status: Active Grant

• Current Assignee: Shaw & Sons Inc
• Original Assignee: Lee A. Shaw, Ronald D. Shaw
• Inventors: Shaw, Lee A., Shaw, Ronald D.
• Primary Examiner(s): Addie; Raymond W
• Application Number:
  US11/394,788
• Publication Number:
  US 20060185286A1
• Time in Patent Office: 795 Days
• Field of Search: 404/51, 404/58, 404/60, 404/64, 404/61, 404/65, 404/66, 404/68
• US Class Current: 404/60
• 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
• CPC Class Codes: E01C 19/504 adapted to, or provided with, means to maintain reinforcing or load transfer elements in a required position removable supports for positioning reinforcing or load transfer elements in general E01C23/045

Abstract

Disclosed is a disc dowel system interposed between adjacent first and second concrete pours defining a pour joint therebetween. The disc dowel system comprises a positioner bracket, a pocket former and a dowel plate. The positioner bracket has a vertically disposed base flange and a horizontally disposed plate portion extending therefrom. The base flange is rigidly attachable to a concrete form. The pocket former has a horizontally extending interior compartment with an open, generally straight side and an arch-shaped compartment perimeter extending therefrom. The straight side is aligned with the pour joint. The pocket former is positioned within the first pour by the positioner bracket. The dowel plate has a generally rounded shape with an embed portion and a slidable portion. The embed portion is rigidly encapsulated within the second pour and the slidable portion is slidably disposed within the pocket former such that the dowel plate permits relative horizontal movement of the first and second pours while restricting relative vertical movement thereof.

Claims

1. A pocket former for a disc dowel system adapted to minimize relative vertical displacement of adjacently disposed concrete slabs, the pocket former comprising:

an interior compartment having at least one horizontally oriented outer surface with at least one former alignment rib being formed on the outer surface such that the former alignment rib is disposed on an exterior of the pocket former so that the former alignment rib supports the outer surface;

 

wherein;

the pocket former is adapted to be encapsulated within one of the adjacently disposed concrete slabs, and the pocket former being sized and configured to receive a dowel plate having a slidable portion and an embedded portion, the slidable portion being configured to be laterally slidable within the interior compartment and the embedded portion being configured to be encapsulated within the other one of the adjacently disposed concrete slabs;

the interior compartment has an open, generally straight side and a taper-shaped compartment perimeter extending therefrom, the straight side being configured to slidably receive the slidable portion into the interior compartment, and the dowel plate being tapered complementary to the taper-shaped compartment perimeter;

a perimeter flange extending around the compartment perimeter and having a generally vertically-oriented cross section with flared upper and lower flange portions.

2. The pocket former of claim 1 having upper and lower outer surfaces, at least one of the upper and lower outer surfaces has a parallel, spaced pair of the former alignment ribs formed thereon to support the outer surfaces.

3. The pocket former of claim 1 wherein the former alignment rib has a flared cross section.

4. The pocket former of claim 1 wherein the former alignment rib has a dovetail shaped cross section.

5. The pocket former of claim 1 wherein at least one of the upper and lower flange portions of the perimeter flange has a dovetail configuration.

6. The pocket former of claim 1 wherein the former alignment rib is oriented perpendicularly relative to the straight side.

7. The pocket former of claim 1 wherein the former alignment rib is configured to resist flexion of the pocket former under pressure of wet concrete.

8. The pocket former of claim 1 wherein the adjacently disposed concrete slabs are formed upon a substrate comprised of at least one of the following:

soil and metal decking.

9. A dowel plate for a disc dowel system adapted to minimize relative vertical displacement of adjacently disposed concrete slabs, the dowel plate comprising:

a slidable portion and an embedded portion;

wherein;

the slidable portion is configured to be laterally slidable within a pocket former having horizontally oriented upper and lower outer surfaces, at least one of the upper and lower outer surfaces having a former alignment rib formed thereon such that the former alignment rib is disposed on an exterior of the pocket former so that the former alignment rib supports the outer surfaces;

the embedded portion being configured to be encapsulated within one of the adjacently disposed concrete slabs.

10. The dowel plate of claim 9 wherein:

the pocket former has an interior compartment having an open, generally straight side and a taper-shaped compartment perimeter;

the interior compartment being configured to slidably receive the slidable portion;

the dowel plate being tapered complementary to the taper-shaped compartment perimeter.

11. The pocket former of claim 9 wherein the dowel plate is fabricated from metal plate.

12. The pocket former of claim 9 wherein the dowel plate is fabricated from carbon fiber.

13. A positioner bracket for installing a pocket former of a disc dowel system within a pour joint located between adjacent first and second concrete pours, the pour joint being formable by a concrete form, the pocket former including an interior compartment having at least one groove formed therein, the positioner bracket comprising:

a base flange; and

a plate portion extending outwardly from the base flange and including upper and lower exterior surfaces and at least one positioner alignment rib formed on at least one of the exterior surfaces, the base flange being configured to be attachable to the concrete form;

 

wherein;

the plate portion is sized and configured to be complementary to the pocket former;

the groove being sized and configured to receive the positioner alignment rib such that the pocket former is held in alignment with the positioner bracket.

14. The positioner bracket of claim 13 including a parallel, spaced pair of the positioner alignment ribs formed on each of the upper and lower exterior surfaces;

wherein;

the interior compartment includes a corresponding number of grooves for receiving the positioner alignment ribs.

15. The positioner bracket of claim 13 wherein the positioner alignment rib is oriented perpendicularly relative to the base flange.

16. A positioner bracket for installing a pocket former of a disc dowel system within a pour joint located between adjacent first and second concrete pours, the pour joint being formable by a concrete form, the positioner bracket comprising:

a base flange; and

a plate portion extending outwardly from the base flange and including upper and lower exterior surfaces and at least one positioner alignment rib formed on at least one of the exterior surfaces, the base flange being configured to be attachable to the concrete form;

wherein;

the plate portion is sized and configured to be complementary to the pocket former;

the pocket former including an interior compartment having at least one groove formed therein;

the groove being sized and configured to receive the positioner alignment rib such that the pocket former is held in alignment with the positioner bracket;

the pocket former further including an open, generally straight side and a compartment perimeter extending therefrom with a perimeter flange extending around the compartment perimeter, the perimeter flange having a generally vertically-oriented cross section with upper and lower flange portions.