Otis Elevator Company

Contitech Antriebssysteme Gmbh

John T Pitts

John P Wesson

Hugh James O'Donnell

Ary O Mello

William A Veronesi

Mark Steven Thompson

Pedro S Baranda

Douglas E Logan

William C Perron

Richard L Hollowell

Kathryn Rauss Sherrick

Richard J Ericson

Gerald E Johnson

James Leo Hubbard

Richard Phillips

Bill Perron

Richard N Fargo

Frank M Sansevero

Bruce P Swaybill

Randy Roberts

Dilip Prasad

Boris G Traktovenko

Willy Adrian

Patricia Derwinski

Paul A Stucky

Xiaodong Luo

Gerald Wente

Mark E Marler

Louis Bialy

Dale R Barrett

Hubert Goeser

James R Irish

Zlatko Strbuncelj

Christoph Bederna

Goldino Alves

Sib S Ray

Hubert E G&ouml;ser

Peter Schreiner

Pierangelo Jotti

Paul Von Hardenberg

Kathryn Rauss

Jotti Pierangelo

Brice N Cassenti

Berry M Grant

Ronald Laliberte

R Zimmerman

Kotur Srinivasan Raghavan

Vijal Mohan Veeramalla

Laxmipathi Chilaveni

Kandi Puroshotham Pavan Kumar

Shailendra Singh

Saravana Kumar Kandasami

Hugh J O'DONNELL

Willilam C Perron

Kathryn R Scherrick

Vijai Mohan Veeramalla

Jr Ary O Mello

Pedro S Barandra

An exemplary vertically moveable elevator system component includes a top portion, a bottom portion and a plurality of vertically oriented side portions between the top and bottom portions. At least one of the side portions includes a roller guide support sheet. A first roller guide roller is supported by the sheet such that the first roller is at least partially disposed on a first side of the sheet and an axis of the first roller is generally parallel with the sheet. Second and third rollers are supported by the sheet such that the second and third rollers are on a second, oppositely facing side of the sheet. An axis of each of the second and third rollers is generally perpendicular to the axis of the first roller. The axis of each of the second and third roller remains in a fixed position relative to the sheet.

Elevator roller guide

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 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

A socket device () for securing an end of a load bearing member () includes first socket members (and) and second socket members (and) that are distinct, separate pieces of material. The second socket members (and) are spaced apart from each other at a desired angle and rigidly secured on one side to one of the first socket members () and on another side to the other first socket member () to form the socket (). A disclosed example includes cooperating tabs () and recesses or openings () for securing the socket members together in a rigidly fixed alignment.

Elevator load bearing termination assembly

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 cords are spaced from an exterior surface on the jacket such that the spacing remains generally constant along the length of the belt. The jacket has a smooth, uninterrupted exterior surface for contacting sheaves as the belt moves in the elevator system. A method of making the inventive belt assembly is disclosed. The inventive belt assembly minimizes the possibility for generating an annoying, audible sound and vibration during elevator operation.

Elevator belt assembly with noise and vibration reducing grooveless jacket arrangement

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

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

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. In one example, the grooves are separated by varying spacings along the length of the belt. In another example, at least a portion of each groove is aligned at an oblique angle relative to the longitudinal axis of the belt. Another example includes a combination of the different spacings and the non-perpendicular alignment.

In an elevator sheave for a flat belt, hard, thin surface plating can be applied to enhance durability while maintaining traction.

Elevator sheave for use with flat ropes

A method of manufacturing and installing multiple flat tension members in an elevator system where the direction of manufacture is determined for each of the flat tension members. Each member is marked to indicate the direction of manufacture. The belts are then installed in an elevator system by aligning the belts in accordance with the marks such that each belt is aligned in the same direction.

Directional uniformity of flat tension members for elevators

In an elevator sheave for a flat belt, the optimum crown height is within a range of approximately 0.033 to about 0.003 times the width of the elevator rope. The optimum radius is in the range of about 16.67 to about 50.00 times the width of the elevator rope. Both the crown height (h) and the crown radius (rc) may be expressed as a function of belt width (Wb). The groove width (wg) is in the range of approximately 1.5 and 2.25 times the width of the belt (Wb). A circumferential surface roughness of about 1.0 to 3.0 is applied. A hard, thin surface coating can be applied to enhance durability while maintaining traction.

A segmented elevator sheave assembly has independently variable shoulder and crowning elements for use with flexible flat ropes in an elevator system. This enables selection of high-traction surface finish and crowning for the sheave groove that contacts a belt, and of low-traction, smooth sheave groove shoulders having a low friction coefficient that may inadvertently contact the belt side surfaces. This configuration is more forgiving to angular misalignment of the sheave and reduces the likelihood of premature degradation of a flat flexible rope due side-surface scuffing along sheave groove shoulders.

Flexible flat rope sheave assembly with separate shoulder and flange surfaces having varying friction properties

An elevator guide system for flat rope tracking prevents the flat rope from hitting the shoulders on a rotating sheave to prevent premature degradation emitting objectionable sounds. The rope guide system includes one or more guide bodies having channels generally aligned with sheave grooves to which each block is adjacently positioned using a frame-mount. The guide bodies align the flat belt on entry into and exit from a sheave. The guide bodies may have a planar back surface, or a circular back surface, with the channel sidewalls disposed thereon and extending outwardly at right angles therefrom.

Linear tracking mechanism for elevator rope

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Avon, CT, United States of America

John T Pitts