The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2003
Filed:
Sep. 18, 2001
Matti Kemppainen, Hyvinkää, FI;
KCI Konecranes Plc, Hyvinkaa, FI;
Abstract
The invention relates to a method for controlling the operation of a crane brake, the crane comprising an electric motor ( ) controlled by means of a frequency converter ( ) for hoisting and lowering movements of the crane; an electromechanical brake ( ) having an impact on said movements, the brake being opened when the motor is started for a hoisting or lowering operation; a load sensor ( ) weighing a load ( ) to be handled; and an overload protection connected to the sensor, the frequency converter ( ) being used for calculating the torque of the motor ( ), which information is compared with the load information, or weight, obtained from the load sensor ( ).