Otis Elevator Company

Daniel B Davis, Iii

Jesse R Richter

Christopher H Koenig

Bruce P Swaybill

John Eschenbrenner

Gregory M O'Seep

Gary P Mendrala

James Leo Hubbard

Patricia Derwinski

Martin J Hardesty

Robert K Williams

Barry G Blackaby

Bruce St Pierre

Valery G Sheynkman

Michael P Keenan

Doug B LaBrecque

Michael Joseph Concannon

Kenneth V Allen

Gregory M Oseep

Robert Scott Farmer

Disclosed is a method of retrofitting a legacy hoist machine including: attaching a primary brake assembly to an end surface of a machine shaft, and configuring a controller to: control the primary brake assembly to provide service braking; and control a brake drum assembly as a secondary brake assembly to thereby apply emergency braking.

Retrofitted hoist machine

A method is disclosed of retrofitting an elevator machine with primary and secondary braking, the machine being disposed on a machine support frame in an elevator machine room, and engaging one or more ropes for providing selective movement of an elevator car disposed in an elevator shaft, the machine having a drive sheave including a cylindrical brake drum, and brake components including dual brake arms; the method including: removing the brake components; affixing flanged disc segments about the drum and interlocking the flanged disc segments to form a brake rotor; and mounting respective brake calipers to frame mounts for providing primary and secondary braking to the elevator machine.

Retrofitting an elevator machine with primary and secondary braking

Disclosed is a method for retrofitting an elevator machine with a thrust bearing, including removing, from a bearing stand, a first cover plate, providing access to an end portion of a motor shaft, securing an extension shaft against the end portion of the motor shaft, securing a thrust bearing housing against or axially offset from the bearing stand, positioning a thrust bearing in the bearing housing, wherein an inner race of the thrust bearing is securely positioned against, and axially fixed to, the extension shaft, and an outer race of the thrust bearing is securely positioned against the bearing housing, and securing a second cover plate to the bearing housing.

Method and kit for retrofitting elevator machines with thrust bearing, and retrofitted elevator machine

A counterweight is provided including a counterweight frame including a crosshead. A counterweight hitch is operably coupled to the counterweight frame. The counterweight hitch includes a vertically stacked first sheave channel and a second sheave channel. Each of the first sheave channel and second sheave channel includes an interior cavity within which at least one individual sheave assembly is mounted. The plurality of individual sheave assemblies is substantially identical and arranged at an angle relative to a central plane of the counterweight frame.

Counterweight for elevator system

An exemplary method of retrofitting a brake onto an elevator machine that was previously installed in an elevator system includes selecting a surface of the elevator machine that rotates as a sheave of the machine rotates. A braking surface is provided on the selected surface. At least one brake member is installed in a position to selectively engage the braking surface.

Supplemental elevator brake and retrofitting installation procedure

Growing community of inventors

Middlefield, CT, United States of America

Daniel B Davis, Iii