Precast curb system
US4971475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Sep 28, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B7/20
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved curb section of a predetermined length sub-divided into modules by transverse grooves which give the appearance of shorter blocks and provide for fracturing the curb section at those locations. Each module of the curb section includes a rearward fastening projection having a vertical bore for passing a nail to engage the curb section to pavement or other base. Such linear mold sections are all that are required when a curve is dictated. The mold sections are sub-divided into the modules to form the curve. A method of forming the curb section is provided which includes an open frame moving vertically against a platform and mold shoes for pressing down on the concrete when poured in the mold frame, including plugs for forming the tops of the fastening projections. The plugs are removed after the mold frame is lifted, and then the shoes are removed to leave the formed curb sections on the bottom wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.