Safety device for portable tools with a heat engine, capable of stopping the operation thereof after sudden, violent movements
US8579041B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 2009 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Sep 3, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16P3/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A safety apparatus for a portable tool having an internal combustion engine has at least one accelerometer providing a measurement of an acceleration of the portable tool in at least one plane or axis. An electronic controller is connected to an output of the accelerometer so as to receive analog or digital information. A generator is driven by the internal combustion engine so as to supply power to the accelerometer. A management card processes the analog or digital information so as to activate the system acting on an ignition exciter box so as to nearly instantaneously stop the internal combustion engine when the acceleration of the portable tool exceeds a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.