Bit attaching arrangement for power tool
US6042310A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1997 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Dec 1, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/306608
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A bit attaching arrangement for a power tool includes a bit locking member rotatable with respect to the output shaft of the power tool. A first gear is fixed to the bit locking member so that rotation of the first gear causes rotation of the locking member. A second gear is fixed to the output shaft so that rotation of the second gear causes rotation of the output shaft. A third gear engages both said first and second gear simultaneously and is capable of rotation by an operator of the power tool. Rotation of the third gear results in counter rotation between the bit locking member and the output shaft so as to result in securement of the bit to the shaft. A further aspect of the invention includes a pinion shaft onto which the third gear is mounted. The pinion shaft is slidably mounted to the power tool so that the third gear may be moved between a position where it engages both the first and second gears and can be used to tighten the bit in place, and a second position wherein it does not engage either of the gears and allows operation of the power tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.