Method of determining the quantity of the material cut by an electrically powered cutting tool and circuit arrangement for implementing this method
US6072399A · kind A · utility
6Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1998 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Aug 6, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26D7/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a method and a circuit arrangement for determining the quantity of the material cut by an electrically powered cutting tool. According to the present invention, the fluctuations of the current consumed by a drive motor are detected, filtered and evaluated. By a comparison with a reference value, it is possible to determine the soiling of the cutting tool with cut residues. The invention is particularly suitable for use in shaving apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.