"""Hole-in-one"" metal punch drive unit"
US4535540A · kind A · utility
2Cited by
9References
5Claims
0Family size
Inventors
Key dates
| Filing date | Mar 14, 1983 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Mar 14, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26F1/3846
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A combination pilot drill and drive assembly for forming holes in sheet metal panels with one or more draw punches is disclosed. The assembly includes separable drill and drive units which can be cooperably engaged with one another when used to drive a pilot drill, and disengaged when the drive unit alone is used to drive a draw punch. The assembly is ordinarily used with a conventional drill motor, which is used to drive the assembly as a pilot drill and also to drive one or more conventional draw punches with the drive unit alone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.