Drive for operating a punching tool
US4208924A · kind A · utility
Inventor
Key dates
| Filing date | Nov 17, 1977 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Nov 17, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18232
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drive for operating a punching tool comprises a toggle-joint lever to one of whose lever members the punching tool is operatively connected. The second lever member of the toggle-joint forms part of a quadrilateral linkage. This linkage consists of the second lever member, a first transverse lever member linked at one end to the second lever member and at the other end to another lever element, and a second transverse lever member linked at one end to the other lever element. The first transverse lever member is a two-armed lever supported on a fixed pivot near its linkage to the second lever member for pivoting the two-armed lever about the fixed pivot. The second transverse lever member and the other lever element are linked to a crank drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.