Hand tool with a shifting gear unit
US4998588A · kind A · utility
27Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1989 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Dec 8, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2250/201
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hand tool has a shifting gear unit containing an output drive shaft. The drive shaft can be coupled with different gears by a connecting device so that a coupled gear drives the shaft. The connecting device is displaced by a slide and the slide is, in turn, displaced by a rotatable handle. Drive cams on the handle seat in engagement recesses in the slide. The drive cams and engagement recesses are spaced equal distances apart, so that as the handle is rotated, the drive cams, one after the other, entrain the engagement recesses and move the slide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.