Power tool
US8191648B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2010 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Jul 31, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2250/261
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
It is an object of the invention to easily determine a currently-selected operation mode in a power tool which offers several operation modes. A representative electric hammer drill 101 embodying a power tool according to the invention has a controller 171 for at least controlling a driving motor 111. The controller 171 includes a switch detecting circuit 173 that detects the on or off state of each of first and second switches 141, 146 when power is on, a computing/driving section 174 that determines a current operation mode based on results of detection of the switch detecting circuit 173, and a motor control section 176 and a drive circuit 177 that output a drive control signal to the driving motor 111 when the switch in the off state is turned on after the computing/driving section 174 determines the operation mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.