Patent ID: 6247575
Filing Date: 2001-06-19
Classification: B66B,F16D

Abstract:
A passenger conveyor system comprising:a main drive shaft on which return elements for transport chains of steps or pallets of the passenger conveyor system are mounted;a further shaft containing return elements for a handrail of the passenger conveyor system;at least one gear connecting said main drive shaft to said further shaft wherein drive power of at least one drive unit arranged external to said return elements is translatable via transport means to said main shaft; anda safety device including:at least one flyweight element provided at an end of the one at least one gear, said at least one flyweight element being disc-shaped and cooperating with the shaft of said one at least one gear;at least one brake means arranged on the shaft of said one at least one gear;at least one movement/rpm sensor; andat least one control means actuating said brake means, said control means being connected to the at least one movement/rpm sensor wherein load-independent braking of said main drive shaft is achievable by said brake means on the basis of signals received from said sensor and wherein said flyweight element is dimensioned so that it substantially compensates for losses due to friction as a result of moving components within said passenger conveyor system.