Power tools with reversible, self-shifting transmission
US9017209B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Jan 18, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0293
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Illustrative embodiments of power tools with reversible, self-shifting transmissions are disclosed. In at least one illustrative embodiment, a power tool may comprise a motor having a motor shaft, an output shaft configured to be coupled to a tool element to rotate a fastener, and a transmission coupled between the motor shaft and the output shaft to transmit rotation from the motor shaft to the output shaft in a low-speed, high-torque mode and in a high-speed, low-torque mode. The transmission may be configured to self-shift between the low-speed, high-torque mode and the high-speed, low-torque mode in response to a change in a torque required to rotate the output shaft in both a clockwise direction and a counterclockwise direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.