Concrete slab striker
US4142815A · kind A · utility
Inventor
Key dates
| Filing date | Nov 28, 1977 |
| Grant date | Mar 6, 1979 |
| Priority date | — |
| Expiry date | Nov 28, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G21/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A concrete slab striker employs a counter-rotating roller to grade or strike off the surface of a freshly poured concrete slab while the concrete is still in the plastic state. An elongated roller is supported on a form bordering the concrete slab in engagement with the concrete surface. A manually movable support frame and pull device coupled to opposite ends of the roller allow workmen to pull the roller across the concrete slab. Simultaneously, the roller is rotated in a direction opposite to its direction of travel relative to the surface of the concrete slab. A thin coating of hardened concrete particles accumulates on the roller to impart a texturized surface to the concrete slab when cured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.