Power tool having a non-linear trigger-speed profile
US8988015B2 · kind B2 · utility
18Cited by
35References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2011 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power tool including a motor, an input unit such as a variable-speed trigger switch, and a controller is provided. The controller controls the speed of the motor as a function of the input level indicated by the electrical signal from the input unit. The function is a first expression within a first predetermined range of the input level and a second expression within a second predetermined range of the input level, where the second expression corresponds to a polynomial of a second degree or higher and is different from the first expression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.