Expansion dowel system and method of forming same

• US 6,758,023 B1
• Filed: 01/10/2002
• Issued: 07/06/2004
• Est. Priority Date: 01/10/2002
• Status: Expired due to Term

• Current Assignee: Felix L. Sorkin
• Original Assignee: Felix L. Sorkin
• Inventors: Sorkin, Felix L.
• Primary Examiner(s): Friedman, Carl D.
• Assistant Examiner(s): KATCHEVES, BASIL S
• Application Number:
  US10/041,880
• Time in Patent Office: 908 Days
• Field of Search: 527/04, 523/960.2, 523/960.4, 525/831, 525/851, 404/52, 404/59, 404/60, 404/63, 220/613, 220/612, 220/309.1, 220/310.1
• US Class Current: 52/704
• 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: E04B 1/483 Shear dowels to be embedded in concrete

Abstract

An expansion dowel system including a dowel bar and a polymeric sleeve affixed over the dowel bar. The sleeve has a closed end and an open end. The closed end is heat sealed and liquid tight. The sleeve has a tapered portion extending toward the closed end and from a tubular portion of the sleeve. The tapered portion has a first flat surface and a second flat surface heat sealed together at the closed end. The dowel bar has an end abutting the narrowing interior of the tapered portion. The dowel bar has an end extending outwardly of the open end of the sleeve. The dowel bar and the sleeve are positioned in a first pour of concrete while an opposite end of the dowel bar is positioned in an adjacent second pour of concrete.

Claims

1. An expansion dowel system comprising:

a dowel bar; and

a polymeric sleeve affixed over said dowel bar, said sleeve having a closed end and an open end, said closed end being heat sealed and liquid-tight, said sleeve having a tubular portion extending to said open end, said sleeve having a tapered portion extending to said closed end, said tapered portion being integral with said sleeve, said tapered portion having a narrowing interior extending from said tubular portion to said closed end, said dowel bar having an end abutting said narrowing interior of said tapered portion, said dowel bar extending centrally through said sleeve and being generally spaced from an interior wall of said sleeve.

2. The system of claim 1, said tapered portion having a first flat surface and a second flat surface heat sealed together at said closed end.

3. The system of claim 1, said dowel bar having an end extending outwardly of said open end of said sleeve.

4. The system of claim 3, further comprising:

a first pour of concrete extending over and around said sleeve, said dowel bar having said end extending outwardly of said first pour of concrete.

5. The system of claim 4, further comprising:

a second pour of concrete adjacent to said first pour of concrete, said end of said dowel bar extending into said second pour of concrete.

6. The system of claim 5, said second pour of concrete having an edge extending in parallel relationship to an edge of said first pour of concrete, said dowel bar and said sleeve extending transverse to said edges.

7. The system of claim 6, each of said first and second pours of concrete being placed upon an underlying surface, the system further comprising:

a chair positioned on said underlying surface and extending upwardly therefrom, said sleeve secured to a top surface of said chair.