Motor lock device
US4510405A · kind A · utility
15Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1982 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Jun 8, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electric motor having an electromagnetically operated clutch automatically engageable to lock the motor shaft against rotation in at least one direction. Embodiments are described in which interruption of the power to the motor causes engagement of the clutch and in which application of power to the motor causes disengagement of the clutch. Also disclosed is an automatic sliding door assembly operated by an electric motor having an electromagnetically operable clutch which is engaged on interruption of power to the motor to lock the motor shaft against rotation in one direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.