Screwdriver with switch-off means for screw-in depth and screw-in torque
US5094133A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 25, 1990 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | May 25, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/141
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
To improve a power-operated screwing tool machine comprising a drive arranged in a housing, a screwing tool and a switch-off means for the screw-in depth including a depth stop held on the housing for fixing a screw-in depth and a clutch arranged between the drive and the tool drive shaft and transferrable by axial displacement of the tool drive shaft from a position of rest in the direction of the drive into a working position, the clutch comprising a clutch element driven by the drive, a clutch element connected to the tool drive shaft and an intermediate clutch element arranged between these clutch elements, with the intermediate clutch element forming with a first one of the clutch elements an entrainment clutch and with the second clutch element a release clutch, such that in addition to a switch-off means for the screw-in depth, the screwing tool machine comprises a switch-off means for the screw-in torque, it is proposed that the switch-off means for the screw-in depth be adapted to be switched over into a switch-off means for the screw-in torque which integrates the release clutch as torque-limiting element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.