US 5,439,075 A · Elevator active suspension system

Abstract

An elevator car vertically guided along a hoistway rail has horizontal motions controlled by means of an actuator wherein horizontal acceleration of the elevator car and relative horizontal displacement between the car and the rail is sensed for controlling such horizontal motions by means of the actuator. Guiding means can be provided in the form of roller clusters at the corners of the car for engaging hoistway rails on opposite sides of the car wherein, for each roller cluster, plural actuators are included with accompanying springs wherein the roller cluster actuators are responsive to the controller for actuating the elevator car horizontally with respect to the hoistway rail. The roller cluster actuators can be electromagnets. Each wheel of the roller cluster can have stop means assocaiated therewith that is operable to limit the extent of movement of the guide wheel in a direction away from the guide rail.

Claims5

Dependent claims

An elevator cab assembly guidence system for guiding movement of a cab assembly over elevator guide rails in a hoistway, said guidence system comprising:

a) a guide roller assembly mounted on said cab assembly for movement toward and away from an associated one of the guide rails, said guide roller assembly comprising a guide roller mounted thereon for rolling engagement with the guide rail;
b) stop means operable to limit the extent of movement of said guide roller in a direction away from the guide rail;
and
c) adjustment means connected to said guide roller assembly and operable to prevent prolonged contact between said guide roller assembly and said stop means during operation of the elevator.

1 more element

Dependencies are inferred from the claim text.

Elevator active suspension system

Life of this patent

Elevator active suspension system

Life of this patent

Abstract

Claims5