Electric driver with torque-adjustable clutch mechanism
US4721169A · kind A · utility
46Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1986 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | May 14, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/147
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Disclosed is an electric driver which is capable of freely controlling the rotational speed of a motor or a bit. The electric driver comprises a transmission mechanism provided between a drive shaft of the motor and the bit, and the transmission mechanism includes a clutch device operated to release the bit from a driven connection with the drive shaft when a transmission torque from the drive shaft to the bit exceeds a predetermined value. The clutch device has an elastic member and the predetermined torque value is adjustable by means of the elastic member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.