Otis Elevator Company

Pedro S Baranda

Hugh James O'Donnell

Ary O Mello

Karl M Prewo

John T Pitts

Richard J Ericson

John P Wesson

Leandre Adifon

Richard L Hollowell

Dennis James Rehmer

Mark Steven Thompson

Douglas E Logan

Marc Frederic Chevilliard

William A Veronesi

Zbigniew Piech

David C Jarmon

James Leo Hubbard

Pascal Rebillard

Dilip Prasad

Alberto Vecchiotti

Paul A Stucky

Bruce St Pierre

Armando Servia

Zlatko Strbuncelj

Jean-Noel Cloux

Fernando Rico

William C Perron

Jean Marc Ferrary

Masashi Kawarasaki

Jean-Pierre Pougny

Jean-Pierre Menard

Frank W Adams

Yutaka Matsumoto

Ron Laliberte

Brice N Cassenti

Hugh J O'DONNELL

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 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 system includes a hoistway defined by a surrounding structure. An elevator car and counterweight are located in the hoistway, and a drive motor is located between the elevator car and a sidewall of the hoistway. The drive motor drivingly couples and suspends the elevator car and counterweight via at least one flat rope or belt.

Elevator system having drive motor located between elevator car and hoistway sidewall

An elevator system () includes a guide rail bracket () attached to a single hoistway wall (). Car guide rails () and counterweight guide rails () are fixed to the bracket (). The counterweight guide rails () are positioned in between the car guide rails () so that the counterweight () can translate therebetween. The elevator car () is supported by rope () and sheave () members coupled to a traction drive ().

Single wall interface traction elevator

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 hybrid material tension member for an elevator or other people transportation system using organic fiber and steel material as the load carrying components either discretely or in combined form. Several embodiments are disclosed.

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

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.

A traction elevator system includes a machine having a rotor including permanent magnets and a flat rope engaged with the machine. The flat rope includes one or more load-carrying members retained within a common sheath from a non-metallic material.

Traction elevator system using flexible, flat rope and a permanent magnet machine

Elevator traction sheave liner

Elevator traction sheave

Growing community of inventors

Farmington, CT, United States of America

Pedro S Baranda