Punch assembly
US5081891A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1990 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Sep 17, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/293
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In accordance with the present invention, a punching assembly is provided which includes a punch slidably mounted in a housing. An air chamber is located between the punch and the housing for air cooling the punch, with means associated between the housing and the punch for automatically transferring air into the chamber in response to the reciprocation of the punch in the housing. The punch has a flange with a sliding fit in the housing to define a piston for changing the volume of the air chamber. In accordance with another feature of the invention, the stripper plate is removable and is automatically locked in place when inserted, i.e., it is self-locking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.