Apparatus for joining pieces of sheet metal
US4835850A · kind A · utility
11Cited by
8References
27Claims
0Family size
Inventors
Key dates
| Filing date | Nov 24, 1987 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Nov 24, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53765
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for joining two or more sheets by means of drawn and extruded material portions comprising a punch, a die and an anvil. The punch is driven to first cooperate with the die in a drawing step, then to transport the work piece to the anvil and to perform in cooperation with the latter an extrusion step. Preferably, a plurality of punches is driven to rotate and to cooperate with a die-and-anvil assembly common to all punches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.