Elevator apparatus
US4982815A · kind A · utility
17Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Nov 7, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2121/22
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An elevator apparatus includes an electric motor for driving the elevator apparatus, an elevator cage adapted to be lifted or lowered by the electric motor, a brake device for holding and retaining an elevator driving system, including the electric motor, and a malfunction detecting device responsive to the application of a torque to a retainer section of the brake device during the lifting or lowering of the elevator cage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.