Long wearing punch
US4762043A · kind A · utility
25Cited by
8References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1987 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Mar 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9432
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved punching tool having a long wearing characteristic and characterized in having at least first and second punching edges disposed on the leading end of the punch body wherein these punching edges are separated by an annular groove and wherein the trailing punching edge is slightly smaller in diameter than the leading punching edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.