Patent ID: 7740109
Filing Date: 2010-06-22
Classification: B66F

Abstract:
1. A method for controlling a vehicle lifting device having at least two, preferably moveable, lifting columns ( 1 - 4 ), which are controlled wirelessly, and a control device ( 5 ) for wirelessly monitoring signal transmissions, the method comprising activating a switch to cause raising and/or lowering movements of the lifting device, wirelessly transmitting to each of the lifting column(s) ( 1 - 4 ) a signal corresponding to the switch activation to cause corresponding raising or lowering movements of the individual lifting column(s), transmitting to the control device ( 5 ) additional signals, which are representative of the individual raising or lowering movements of each column, wherein the control device ( 5 ) continuously exchanges control signals with the lifting columns ( 1 - 4 ) and monitors reception of the control signals at least at one of the control device ( 5 ) and the lifting columns ( 1 - 4 ), and stopping normal operation of the raising or lowering movements for unacceptably high movement differences among the individual lifting columns, wherein the lifting movement in each lifting column ( 1 - 4 ) is transmitted via a rotating threaded spindle ( 21 ) and the threaded spindle ( 21 ) engages with a grip nut ( 22 ), which is set in rotation during raising and lowering movements, is led into active connection with a braking element ( 29 ), and is braked when a certain lowering speed of the threaded spindle is exceeded.