Multispeed power tool transmission
US7220211B2 · kind B2 · utility
39Cited by
74References
68Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2004 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Nov 23, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/201
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A multi-speed transmission assembly for a rotary power tool. The transmission assembly includes a plurality of transmission stages, with at least two of the transmission stages employing a movable reduction element that permits the transmission stage to be operated in an active mode and an inactive mode. The movable reduction elements are coupled to a switching mechanism that switches the reduction elements in a predetermined manner to provide at least three-gear reduction or speed ratios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.