Patent ID: 7303183
Filing Date: 2007-12-04
Classification: B66D

Abstract:
1. A safety brake mechanism of a driven winding drum of a hoisting machine, said hoisting machine having a lifting gearbox, said lifting gearbox including a take-off shaft, said safety brake mechanism being substantially capable of braking the winding drum to a standstill without jerking when a lowering speed of the winding drum is excessive, said safety brake mechanism comprising: a brake ring that revolves concentrically with the winding drum, said brake ring being frictionally joined to the winding drum when the brake ring engages the winding drum; said brake ring having a brake surface, said brake surface provided on an outer circumference of said brake ring; a rigid coupling, said rigid coupling concentrically connecting the take-off shaft of the lifting gearbox with the winding drum, wherein the safety brake mechanism is removably connected with the take-off shaft and the winding drum.