Method of and arrangement for preventing accidents during operation of a manually-operated machine tool with a rotatable toolbit
US5584619A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1994 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Dec 27, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/165
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of and an arrangement for preventing accidents during operation of a manually-operated machine tool having a rotatable toolbit and a drive motor for driving the toolbit, wherein an operational condition of the toolbit is determined with a rotational motion sensor, a time constant is selected, a maximum forecast rotational angle at an end of a time period determined by the selected time constant is calculated on a basis of a rotational motion signal generated by the sensor, and transmission of drive motion from the drive motor to the rotatable toolbit is interrupted as soon as the calculated, forecasted rotational angle exceeds a value of the maximum allowable rotational angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.