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1. US20120073933 - Escalator dual solenoid main drive shaft brake

Office United States of America
Application Number 13320957
Application Date 16.06.2009
Publication Number 20120073933
Publication Date 29.03.2012
Grant Number 08534444
Grant Date 17.09.2013
Publication Kind B2
IPC
B66B 25/00
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
BELEVATORS; ESCALATORS OR MOVING WALKWAYS
25Control of escalators or moving walkways
CPC
B66B 29/00
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
BELEVATORS; ESCALATORS OR MOVING WALKWAYS
29Safety devices of escalators or moving walkways
Applicants Senger Alois
Otis Elevator Company
Inventors Senger Alois
Agents Kinney & Lange, P.A.
Title
(EN) Escalator dual solenoid main drive shaft brake
Abstract
(EN)

A main drive shaft brake for a passenger conveyor includes a braking element, an actuator, and a counter-actuator. The actuator is de-energized to release the braking element and halt operation of the passenger conveyor during an abnormal or emergency condition. An energized counter-actuator permits release of the braking element but, when de-energized, inhibits release of the braking element by the actuator to prevent unintentional release of the braking element caused by, for example, an accidental loss of power to the actuator.