Elevator drive machine placed in the counterweight
US5573084A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1994 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Jun 23, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B17/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A rotating elevator motor provided with a traction sheave is placed in the counterweight of an elevator suspended from ropes. The sector-shaped stator of the motor has a diameter (2*Rs) larger than that (2*Rv) of the traction sheave and the elevator ropes are passed through the open part or parts of the stator. This structure allows the use of traction sheaves of dif ferent diameters with rotors of the same diameter. Still, the length of the motor remains small and the motor/counterweight of the invention can be accommodated in the space normally reserved for a counterweight in an elevator shaft. The motor shaft is placed in the counterweight substantially midway between the guide rails and the same number of ropes are placed on both sides of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.