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US 5,025,893 AGranted
Vibration suppressing device for elevator
AssigneeOtis Elevator Company
InventorSaburo Saito
Life of this patent
Estimating the term…
Abstract
An elevator rope guide assembly prevents or lessens vibrations of the ropes connected to the cab by means of auxiliary guide rollers pairs disposed on either side of the cab sheave. Additionally, the cab sheave has rope-engaging grooves which are substantially deeper than the diameter of the rope and include outwardly divergent sides.
Claims5
An elevator hoist rope vibration suppressing assembly comprising:
- (a) an elevator cab;
- (b) a grooved sheave rotatably mounted on top of said elevator cab, said grooved sheave receiving the elevator hoist ropes;
- and
- (c) two pairs of grooved guide rolls mounted on top of said elevator cab with each pair of guide rolls engaging the hoist ropes at points upwardly offset from and on both sides of the grooved sheave to restrain lateral movement of the hoist ropes as the latter are fed onto and off of the grooved sheave, whereby lateral vibratory movement of the hoist ropes above the cab is suppressed.
1 more element
Dependencies are inferred from the claim text.