Portable marking tool
US4401030A · kind A · utility
3Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1981 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Jun 15, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB44B5/0061
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A portable marking tool having a cylindrical housing and a concentric cylinder slidably supporting the hammer member for delivering an impact to a marking die. A charge of air is built up in the housing which is suddenly imposed on the piston-like hammer member when the charge of air is built up to overcome a predetermined opposing load. In one embodiment, the opposing load is afforded by a pressure regulated chamber and in another embodiment by an adjustable spring load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.