Apparatus for punching steel studs and control circuit
US6378217B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D28/243
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A portable hand-held apparatus for punching light gauge steel framing studs used in building construction to form holes of sufficient size to allow building wiring and piping to extend therethrough includes a control circuit connected to a limit switch and a main switch, and an output connected to a driving mechanism. The control circuit is configured to selectively operate the driving mechanism in response to assertion of the main switch by the user to drive the punch and die assembly from the deactuated position, over the working cycle, through the actuated position to form the punched hole, and continue to drive the punch and die assembly to the deactuated position to complete the cycle and assert the limit switch. The control circuit halts operation of the driving mechanism in response to assertion of the limit switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.