Redundant overspeed protection for power tools
US8476853B2 · kind B2 · utility
15Cited by
15References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2010 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Jul 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/093
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An overspeed protection subsystem is provided for a power tool having an electric motor. The overspeed protection subsystem is comprised of: a motor switch coupled in series with the motor; a motor control module interfaced with the motor switch to control switching operation of the motor switch; and an overspeed detection module that determines rotational speed of the motor and disables the power tool when the rotational speed of the motor exceeds a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.