Patent ID: 8950554
Filing Date: 2015-02-10
Classification: B66B

Abstract:
1. An elevator governor comprising: a rotatable sheave; a rope wound on the sheave and moving in response to an ascending movement and a descending movement of a body of an elevator, whereby the sheave rotates in one of two rotational directions in response to the ascending movement of the elevator body and rotates in the other of the two rotational directions in response to the descending movement of the elevator body; a fly-weight provided in the sheave such that an outward moving quantity of the fly-weight respectively increases and decreases in response to an increase and a decrease in a rotation speed of the sheave; a detector provided in proximity to the fly-weight and performing overspeed detection of the sheave when the fly-weight has moved outward by a predetermined quantity; and a stopper which is provided in proximity to the fly-weight and prevents the fly-weight from moving outward more than or equal to the predetermined quantity when the sheave is rotating in a predetermined direction which is only one of the two rotation directions.