Safety brake mechanism for power chain saws
US4328617A · kind A · utility
5Cited by
8References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 1981 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | May 11, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D59/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A chain saw safety brake mechanism includes an actuating drum rotatably disposed around the periphery of a clutch drum and a brake band wound around the clutch drum at least one convolution and hooked at one of its ends its other actuating drum and attached to the other end to a chain saw body. A spring is provided for turning the actuating drum from its ready position to a brake actuating position in which the brake band is tightened around the clutch drum to arrest its rotation. A reset lever is provided on the actuating drum to turn it to the ready position thereby producing a spring force in the spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.