Manually operated working device having a speed that is adjusted automatically
US6651608B2 · kind B2 · utility
5Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2002 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jul 19, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B17/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a motor-driven operating device that comprises a guide handle. Two sensor elements are provided on the guide handle and in two handle areas for detecting the hands of an operator. An ignition device of the motor is controlled by means of a security control device in such a way that the speed can only be increased beyond a security speed when the guide handle is held with both hands, whereby said security control device evaluates the sensor signals. The motor speed is limited to the security speed when the two sensor signals are missing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.