Circular edging tool for concrete
US6415472B1 · kind B1 · utility
9Cited by
7References
1Claims
0Family size
Inventor
Key dates
| Filing date | Aug 30, 1999 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Aug 30, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F21/161
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A hand tool for forming a slot between the outer cylindrical surface of a manhole frame, and the concrete in which the frame is embedded. The tool has a tool body with a bottom surface that engages the soft concrete in which the frame is embedded, and a concave lip for slidably engaging the outer surface of the manhole frame or any other circular or cylindrical object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.