Motor saw brake
US4757881A · kind A · utility
92Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 1986 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | May 5, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2121/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A chain brake which is manually adjustable into a cocked position and releasable by means of stored electric energy and a trigger, includes a permanent magnet circuit in which a movable armature is a part of a latch which keeps the brake in the cocked position. The permanent magnet has a coil exerting a counter directional magnetic field to the permanent magnet when it passes current. The holding force on the latch decreases and the brake is released when current from a capacitor passes through the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.