Clutch for injury mitigation system for power tools
US8844696B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2008 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Mar 5, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9379
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A clutch mechanism includes a bolt threadably received by a drive shaft and configured to secure the blade on an inner washer disposed about the drive shaft. The clutch mechanism also includes a spring assembly that is generally annularly disposed around the bolt. When the spring assembly is compressed, the spring assembly is configured to grip the blade inner washer and the spring assembly. At least one shallow pocket and at least one deep pocket are disposed in a lower surface of an upper retainer, and at least one geometric spacer extends from the spring assembly. In the coupled condition, the geometric spacer is engaged with the shallow pocket, and in the uncoupled condition, the plug structure is engaged with the deep pocket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.