Otis Elevator Company

William C Perron

John P Wesson

William A Veronesi

Mark Steven Thompson

John T Pitts

Ary O Mello

Hugh James O'Donnell

Kathryn Rauss Sherrick

Richard Phillips

Dilip Prasad

Pedro S Baranda

Paul A Stucky

James R Irish

Douglas E Logan

Jotti Pierangelo

Brice N Cassenti

Peter Schreiner

Pierangelo Jotti

Kathryn Rauss

Hugh J O'DONNELL

Jr Ary O Mello

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

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 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.

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

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

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Burlington, CT, United States of America

William C Perron