Patent ID: 7975809
Filing Date: 2011-07-12
Classification: B66B,Y10T

Abstract:
1. A method for preventing disturbing noise caused by a counterweight of an elevator, the counterweight comprising a frame and a plurality of separate weight elements arranged in a stack and fitted within the frame, the method comprising: providing at least one temporary tightening device wound around and firmly tightening at least the plurality of separate weight elements such that the plurality of separate weight elements contact and bear against each other; after the plurality of separate weight elements are tightened by the at least one temporary tightening device, providing at least an actual tightening member wound around and firmly tightening at least the plurality of separate weight elements; and after the plurality of separate weight elements are tightened by both the at least one temporary tightening device and the at least one actual tightening device, removing the at least one temporary tightening device.