Drill having alternate mode control
US5115175A · kind A · utility
48Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1988 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Feb 3, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drill having a variable speed trigger and logic circuit which can control the direction and speed of rotation. In an alternating mode of operation, the logic circuit alternates the direction of motor/chuck rotation on each successive activation of the trigger. The drill can also be set to rotate in either a forward or reverse direction without the alternating feature. A pair of lights provide visual confirmation that the drill is set to rotate in either a forward or reverse direction. The drill can also be set in a safe mode to prevent rotation in either direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.