Tools for imprinting non-repeating stone patterns in fresh concrete
US4135840A · kind A · utility
Inventors
Key dates
| Filing date | Feb 27, 1978 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Feb 27, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/43
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is a tool for forming a non-repeating design in fresh concrete. The tool has a plurality of blades forming a non-repeating stone pattern. The perimeter of all interior stone patterns are closed and/or defined, while all exterior patterns are open and only partially defined. The open blade ends of the open patterns are equally spaced about the perimeter of the tool, so that it will align with an adjacent open blade end of a second tool or an imprint and complete a stone pattern in any position and create a non-repeating design. The tool may also be used to create a random repeating pattern by successive non-rotational alignment of all open blade end of any particular side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.