Electric power tool with code receiver
US6005489A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1996 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jul 1, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/1418
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electric power tool includes a power supply which is one of a replaceable battery unit, a rechargeable battery unit, and a cable connection for detachably connecting to a mains power supply. A code receiver is provided for receiving a code signal from a code signal emitting device via a contact free transmission. An electronic controller is arranged to switch the power tool to an operable mode when the power supply is coupled to the power tool and the code signal is received by the code signal receiver. The electronic controller is also arranged to switch the power tool to an inoperable mode when the power supply is uncoupled from the power tool and to maintain the power tool in the inoperable mode until the power supply is re-coupled to the power tool and the code signal is again received by the code signal receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.