Patent ID: 6431321
Filing Date: 2002-08-13
Classification: B66B

Abstract:
A damping apparatus for tensioning at least one trailing rope of an elevator installation, the rope engaging at least one tensioning pulley, comprising:a cylinder closed at opposite ends and adapted to be coupled to the pulley; a piston slidably received in and dividing said cylinder into two chambers, said chambers being filled with a damping fluid; a throttled connecting line attached to said cylinder and connecting said chambers in fluid communication; a channel in fluid communication with said chambers and provided with a non-return valve for permitting flow of said fluid between said chambers in only one direction; and a piston rod attached to said piston and extending from said opposite ends of said cylinder whereby when said cylinder is coupled to the pulley, movement of the pulley in a predetermined direction relative to and along a longitudinal axis of said rod moves said cylinder relative to said piston and the movement of the pulley is damped by the flow of said fluid through said connecting line.