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:
Jun. 18, 2002
Filed:
Sep. 18, 2000
Jörgen Andersson, Bjärred, SE;
Örjan Christoffersson, Lund, SE;
Anders Helmner, Bjärred, SE;
Kenneth Nilsson, Tomelilla, SE;
Telair International AB, Lund, SE;
Abstract
The invention concerns a method for controlling the operation of an actuator unit, comprising the steps: a) repeatedly reading the current fed to the actuator unit, b) a first comparison wherein the readings are compared with a first maximum level and if the readings are above the maximum level the electrical power fed to the actuator unit is cut off, c) a second comparison wherein two successive readings repeatedly are compared with each other and if the differences between the readings are below a first ramp level a number a steady state condition for the current fed to the actuator unit is detected, and d) if steady state is detected setting at least one overload detection limit on basis of a steady state reading of the current fed to the actuator unit. The invention also concerns a device for carrying out the method and a conveyor incorporating the device.