Clutch mechanism for use in rotary tools having screw-driving and drill modes
US6523658B2 · kind B2 · utility
31Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2001 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Feb 23, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D43/2022
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A clutch mechanism (17) includes an internal gear (10) and a plurality of cylindrical pins (26) pressed rearward against a front end surface of the internal gear (10) by a coil spring (25) via a flat washer (24). Provided on the internal gear's front end surface are a plurality of cam protrusions (28) corresponding in number and position with the pins (26). Each cylindrical pin (26) has at its rear end surface a circumferentially chamfered edge (27) and each cam protrusion (28) has a pair of guide slope surfaces (29) with same inclination as the chamfered edge (27) of the pin (26).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.