Two speed gear system for power tool
US5011341A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Nov 9, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/65
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pneumatic power tool having a rotary driven output spindle defining an axis, an air motor having an output shaft axially aligned with the output spindle, transmission means connecting the output shaft and the spindle, and control means for operating the air motor. Incorporated in the transmission means is a two speed gear system to provide a first drive having a lower torque output and a second gear reduced having a higher torque output and a lower rotary speed output relative to the first drive. The two speed gear system also includes a spindle assembly which is axially translatable, biasing means for biasing the spindle assembly to the first drive position, and a collar rotatable about the axis and including a follower cooperative between the spindle assembly and the collar to effect axial movement of the spindle assembly between the first and second drive positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.