Motor chain saw with dynamic safety braking device
US4324045A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1980 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | May 29, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27B17/083
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A portable motor chain saw with a safety braking device to protect against kick-back, recoil or centrifugal movements of the saw. The saw includes a handle supported against the motor housing by damping elements, and also includes a locking device which on the one hand is connected with the handle, and on the other hand engages against a hand guard in such a way that it is released under the influence of relative movement, of the motor housing with respect to the handle, caused by a kick-back or centrifugal movement, consequently releasing the hand guard. The locking device has an abutment surface extending transverse to the direction of centrifugal movement, and this abutment surface cooperates with a projection directed against it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.