Patent ID: 7026780
Filing Date: 2006-04-11
Classification: B66D

Abstract:
1. Method for stabilizing the motion of an articulated chain of a chain block to impede the formation of resonance oscillation of the chain, in which an articulated chain is passed across a polygonal chain wheel with non-uniform pitch, said chain wheel driven by an electric motor, said method comprising: actuating the electric motor by an electronic damper; and superimposing a dampening actuating variable on the velocity of the chain wheel wherein the dampening actuating variable produces a change in the chain velocity so as to impede formation of a resonance oscillation wherein the dampening actuation variable is at least one chosen from a periodic variable and a stochastic variable, wherein a first input variable and a second input variable are supplied to said electronic damper, and wherein the dampening actuating variable is computed in said electronic damper from the first and second input variables and transferred to the electric motor.