Patent ID: 7896139
Filing Date: 2011-03-01
Classification: B66B

Abstract:
1. A guide-rail brake of an elevator, comprising: a frame part fixed to the elevator car, a prong part, which contains turning jaws that correspond to the guide rail via the braking surfaces when braking, a spring loading the prong part to press the braking surfaces to the guide rail, a controllable mover, which is an electromagnet, the electromagnet containing two pulling core pieces, the force effect of the electromagnet on the prong part being opposed to the spring, wherein the pulling core pieces are structurally configured to be in contact with each other and provide an air gap arranged between center parts of the pulling core pieces of the electromagnet of the guide-rail brake when the brake is fully energized, and wherein a damping circuit is arranged in the coil of the electromagnet of the guide-rail brake to speed up operation of the guide-rail brake.