System of protecting the edges and construction joints of cast in place concrete slabs
US8302359B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Apr 22, 2005 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Aug 19, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B2005/324
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved joint edge assembly, of the type used in the construction of concrete slabs, is disclosed. The assembly comprises a longitudinal joint rail, preferably of steel, which is supported off the ground by formwork. The joint rail comprises first and second joint edge members that are connected to each other by interference-type connectors with self-release elements. A plurality of studs extends downward and outward from each of the joint edge members into the concrete slabs provide a positive mechanical connection between the slab and the joint rail. As the concrete shrinks during hardening, the self-release elements of the interference-type connectors allow the joint to freely open. The joint edge assembly thus provides a self-releasing joint between adjacent slab sections, and protects the edges of the adjacent slab sections from damage. A dowel aligner may also be integrated into the assembly, to allow proper positioning of dowels within the slab.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.