Patent ID: 6176350
Filing Date: 2001-01-23
Classification: B66B

Abstract:
A progressive safety gear for an elevator having guide rail for an elevator car, the safety gear comprising:a console arrangeable so as to encompass the guide rail and be in a transverse direction to the guide rail;an active brake shoe and a passive brake shoe supported on the console so as to be positioned one on each side of the guide rail;a cam rotatably mounted on the console; andan eccentric fastened to the cam so that they rotate together between a ready position and braking positions defined by rotation of the eccentric and cam, the cam and the eccentric being rotatable about a common center, the cam being rotatable in both a clockwise and a counter-clockwise direction so that the safety gear and brake shoes can be tripped in both travel directions, and the cam being configured so as to remain in contact with the guide rail in the braking position after a braking operation has taken place so as to permit the cam to be turned backwards, thereby making it possible to release the engaged safety gear and the brake shoes by pulling the elevator car out of a position in which it is blocked.