Electromagnetically operated friction brake having automatic adjustment mechanism
US4787484A · kind A · utility
3Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1987 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Jan 23, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2121/22
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A brake comprises a base on which a pair of brake shoes are mounted, springs to resiliently bias the brake shoes into engagement with a drum which is fixed relative to a rotatable member to be braked, to apply the brake, an electromagnet to move the brake shoes against the springs to release the brake, the electromagnet comprising a coil and an armature movable relative to the coil when the coil is energized, and a lost motion device automatically to maintain the movement of the armature relative to the coil within a predetermined range of movement irrespective of the amount of wear of the brake shoes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.