Load compensating device, especially for lifting appliance
US7780145B2 · kind B2 · utility
1Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A load compensating device, especially one for lifting appliances, includes a detector for detecting an overload or an underload and designed to cause actuation of the compensating device. The device comprises an actuator attached to one of ends of a rope or ropes that support the load for producing positive or negative displacement of the rope or ropes over a short distance compared with the length of the rope or ropes. The actuator is operated by a brushless electric motor connected to an infinitely variable-speed transmission. The transmission is connected to the detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.