Concrete dowel system

• US 9,617,694 B2
• Filed: 12/04/2015
• Issued: 04/11/2017
• Est. Priority Date: 01/15/2014
• Status: Active Grant

• Current Assignee: Shaw & Sons Inc
• Original Assignee: Shaw & Sons Inc
• Inventors: Shaw, Ronald D.
• Primary Examiner(s): Troutman, Matthew D.
• Application Number:
  US14/959,404
• Publication Number:
  US 20160083914A1
• Time in Patent Office: 494 Days
• Field of Search: 404 88
• 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
• CPC Class Codes: E04B 1/48 Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses
• CPC Class Codes: E04G 17/06 Tying means; Spacers ; Devices for extracting or inserting wall ties E04G17/047 takes precedence; permanent forms for walls, e.g. with ties E04B2/86

Abstract

A dowel placement system including a fastener configured to be engageable with a form, and a radially compressible bushing coupled to the fastener and defining an adjustable outer diameter. The system further includes an elongate dowel sleeve having opposed proximal and distal end portions, and an axial opening having an inner diameter and extending into the dowel sleeve from the proximal end portion to the distal end portion. The bushing is insertable within the axial opening of the dowel sleeve, and the bushing and dowel sleeve are configured such that insertion of the bushing within the dowel sleeve causes the outer diameter of the bushing to compress and conform to the inner diameter of the dowel sleeve and to create a friction force between the bushing and the dowel sleeve to mitigate movement of the dowel sleeve relative to the bushing during formation of the concrete structure.

Claims

1. A dowel placement system for placing dowels in a concrete structure fabricated using a form, the dowel placement system comprising:

a fastener configured to be engageable with the form;

a bushing having a shaft and a flange disposed adjacent one end of the shaft, the shaft having a continuously decreasing diameter in a direction away from the flange; and

an elongate dowel sleeve having an outer diameter, a proximal end portion, an opposing distal end portion, and an axial opening having an inner diameter and extending into the dowel sleeve from the proximal end portion to the distal end portion;

the bushing being insertable within the axial opening of the dowel sleeve, the bushing and dowel sleeve being configured such that insertion of the bushing within the dowel sleeve creates a friction force between the bushing and the dowel sleeve to mitigate movement of the dowel sleeve relative to the bushing during formation of the concrete structure; and

wherein an outer diameter of the flange of the bushing is less than the outer diameter of the elongate dowel sleeve.

2. The dowel placement system recited in claim 1, wherein the shaft defines a maximum shaft diameter and a minimum shaft diameter approximately 0.002 inches smaller than the maximum shaft diameter.