Sheave for use in an elevator system

US9010495B2 · kind B2 · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Dilip Prasad · Granby, US
• Brice N. Cassenti · Tolland, US
• Pedro S. Baranda · Farmington, US
• William A. Veronesi · Hartford, US
• William C. Perron · Bristol, US
• Ary O. Mello · Farmington, US
• Paul A. Stucky · Stockton, US
• John T. Pitts · Avon, US
• John P. Wesson · Vernon, US
• Mark S. Thompson · Tolland, US

Key dates

• Filing date: Aug 4, 2004
• Grant date: Apr 21, 2015
• Expiry date: Sep 27, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66D2700/026
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An elevator sheave (20) includes a belt guiding surface (26) having a surface profile along at least a portion of the belt guiding surface. The surface profile preferably is defined by an nth order polynomial equation where n is a number greater than 2. In one example, the reference point (40) is a central point along the width of the belt guiding surface (26). In one example, a central portion (42) of the surface profile preferably is aligned to be generally parallel with the central axis (34) of the sheave body. Some examples have curvilinear side portions (44,46) between the central portion (42) and the edges (28,30) of the sheave. Other examples also include second side portions (48,50) that have linear profiles.