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1. US20110108386 - Apparatus and method for variable torque braking of escalators and moving walkways

Office United States of America
Application Number 12613940
Application Date 06.11.2009
Publication Number 20110108386
Publication Date 12.05.2011
Grant Number 07950514
Grant Date 31.05.2011
Publication Kind B1
IPC
B66B 25/00
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
BELEVATORS; ESCALATORS OR MOVING WALKWAYS
25Control of escalators or moving walkways
Applicants Thomas Nurnberg
Anthony Boom
Inventors Thomas Nurnberg
Anthony Boom
Agents Venable LLP
Robert Kinberg
Ryan M. Flandro
Title
(EN) Apparatus and method for variable torque braking of escalators and moving walkways
Abstract
(EN)

A braking apparatus and method for an escalator or moving walkway are provided. The braking apparatus may include a braking element, a linearly controllable solenoid assembly, a biasing mechanism, and a control device. The braking element may be adapted to engage a brake drum or brake disk on a drive shaft of the escalator or moving walkway. The linearly controllable solenoid assembly may include a brake coil and an elongated member. The elongated member may be moveable linearly along an axis and the braking element may be coupled to the elongated member. The biasing mechanism may be arranged to bias the elongated member in a first direction along the axis to increase a torque applied to the drive shaft by the braking element. The control device may be configured to modulate a current to the brake coil based on at least one measured parameter associated with an operating condition of the escalator or moving walkway, whereby the elongated member is biased in a second direction along the axis opposite the first direction to decrease the torque applied to the drive shaft by the braking element.