Otis Elevator Company

Contitech Antriebssysteme Gmbh

Ary O Mello

Hugh James O'Donnell

Pedro S Baranda

John T Pitts

John P Wesson

William A Veronesi

Mark Steven Thompson

Karl M Prewo

Gerald E Johnson

William C Perron

Kathryn Rauss Sherrick

Richard J Ericson

Dale R Barrett

Douglas E Logan

Mukunda B Pramanik

Bill Perron

Richard Phillips

Randy Roberts

Dilip Prasad

Paul A Stucky

Xiaodong Luo

Mark E Marler

Dennis James Rehmer

Arthur M McClement

Hubert Goeser

James R Irish

Christoph Bederna

Goldino Alves

Brice N Cassenti

Kathryn Rauss

Paul Von Hardenberg

Pierangelo Jotti

Peter Schreiner

Jotti Pierangelo

Hugh J O'DONNELL

Willilam C Perron

Kathryn R Scherrick

An elevator load bearing assembly () includes a jacket () having different portions comprising different polymer compositions. In a disclosed example, a plurality of tension members () are at least partially surrounded by a first portion () comprising a first polymer composition. A second portion () establishes at least one exterior surface () of the jacket () and comprises a second polymer composition. In one example, a surface-modifying agent is added to alter the composition of at least a portion of the jacket (). In another example, co-extrusion techniques using different polymer compositions establish different portions of the jacket ().

Elevator load bearing assembly having a jacket with multiple polymer compositions

A tension member for an elevator system has an aspect ratio of greater than one, where aspect ratio is defined as the ratio of tension member width w to thickness t (w/t). The increase in aspect ratio results in a reduction in the maximum rope pressure and an increased flexibility as compared to conventional elevator ropes. As a result, smaller sheaves may be used with this type of tension member. In a particular embodiment, the tension member includes a plurality of individual load carrying cords encased within a common layer of coating. The coating layer separates the individual cords and defines an engagement surface for engaging a traction sheave.

Tension member for an elevator

An elevator sheave () includes a belt guiding surface () having a surface profile along at least a portion of the belt guiding surface. The surface profile preferably is defined by an norder polynomial equation where n is a number greater than 2. In one example, the reference point () is a central point along the width of the belt guiding surface (). In one example, a central portion () of the surface profile preferably is aligned to be generally parallel with the central axis () of the sheave body. Some examples have curvilinear side portions () between the central portion () and the edges () of the sheave. Other examples also include second side portions () that have linear profiles.

Sheave for use in an elevator system

An illustrative method of making a load bearing member for use in an elevator system includes mechanically roughening at least one surface on an exterior of a jacket of the load bearing member to establish a friction characteristic that facilitates engagement between an elevator system sheave and the roughened surface.

Elevator load bearing member having a jacket with at least one rough exterior surface

An elevator load bearing member assembly includes at least one roughened surface () on a polyurethane jacket (). In one example, mechanical roughening is used to roughen the surface () after the jacket has been extruded onto tension members (). In another example, the temperatures used for molding a jacket () are controlled to induce melt fracture and roughen the surface () during the forming process. Other examples include chemically roughening the jacket surface and using localized heating to roughen the surface. The roughened jacket surface improves friction characteristics of a load bearing member assembly.

An elevator load bearing assembly () includes a plurality of cords () within a jacket (). The jacket has a plurality of grooves () spaced along the length of the belt assembly. Each groove has a plurality of portions () aligned at an oblique angle (A, B) relative to a longitudinal axis () of the belt (). In one example, the grooves are separated such that there is no longitudinal overlap between adjacent grooves. In another example, transitions () between the obliquely aligned portions are at different longitudinal positions on the belt. Another example includes a combination of the different longitudinal positions and the non-overlapping groove placement.

Elevator belt assembly with noise reducing groove arrangement

A tension member termination device optimized for terminating flexible flat tension members, the device including a socket with a compression portion and a bulbous portion and a compression plate on each side of the compression portion fastenable by fasteners extending through all of these feature. The device provides a pathway for the tension member through the device and upon torquing the fasteners reliably secures the tension member while avoiding deleterious pressure and stress therein. The invention also provides a safety clamp for optional use with the invention.

Traction enhanced controlled pressure flexible flat tension member termination device

An elevator load bearing member assembly includes at least one traction enhancing surface () on a jacket (). In one example, a mechanical removal process is used to strip away at least some of an amide-rich layer from the surface () after the jacket has been extruded onto tension members (). In another example, a chemical removal process is used. Another disclosed example includes disrupting the surface.

Elevator load bearing member having a jacket with at least one traction-enhancing exterior surface

A tension member termination device optimized for terminating flexible flat tension members, the device including a socket with a compression portion and a bulbous portion and a compression plate on each side of the compression plate on each side of the compression portion fastenable by fasteners extending through all of these feature. The device provides a pathway for the tension member through the device and upon torquing the fasteners reliably secures the tension member while avoiding deleterious pressure and stress therein.

A tension member for an elevator system has an aspect ratio of greater than one, where aspect ratio is defined as the ratio of tension member width w to thickness t (w/t). The increase in aspect ratio results in a reduction in the maximum rope pressure and an increased flexibility as compared to conventional elevator ropes. As a result, smaller sheaves may be used with this type of tension member. In a particular embodiment, the tension member includes a plurality of individual load carrying ropes encased within a common layer of coating. The coating layer separates the individual ropes and defines an engagement surface for engaging a traction sheave.

Elevator traction sheave liner

Elevator traction sheave

A handrail entry safety device including a collar and a base is provided for a balustrade having an enclosure and a handrail. The base includes an upper section and a lower section, the latter having a seat for receiving the collar. The upper section is hingedly attached to the lower section above where the handrail enters the safety device, thereby enabling the lower section and the collar to pivot together.

Balustrade handrail entry safety device

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Newington, CT, United States of America

Ary O Mello