Electrically driven hand-operated tool
US4689534A · kind A · utility
81Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1983 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Oct 7, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/937
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The electrically driven hand tool such as hand-operated drilling, milling or sawing machine includes a universal driving electromotor controlled via electric circuits by means of a plurality of switches, the control elements of which are in the form of pushbuttons arranged in a matrix or rectangular array on the top surface of the tool housing. The pushbuttons are illuminated when actuated and include a digital keyboard connected to a microprocessor to enter digital data corresponding to the desired value of speed or torque, and the microprocessor adjusts, via a power circuit, the electromotor to the entered data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.