Method and device for the simulation of loads on lifting appliances
US6463812B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Apr 30, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/90
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The method is intended for setting the force limiters of a lifting appliance equipped with a winch-type lifting mechanism (8), the electric motor of which is controlled by a variable-speed drive unit ensuring regulation of the drive torque.This method involves:mounting a direct-reading or remote-reading balance (23) between the lifting hook (5) and a fixed point (27),placing the lifting mechanism in a “setting” mode,displaying desired values for the limitation of the nominal drive torque, commanding the lifting function in the raising direction by means of the control of the said electric motor and reading the tensile force values (F) supplied by the balance (23).The invention applies more particularly to the setting of the force limiters on tower cranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.