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

US8449349B2 · kind B2 · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Mark S. Thompson · Tolland, US
• William A. Veronesi · Hartford, US
• John T. Pitts · Avon, US
• Ary O. Mello · Farmington, US
• Hugh J. O'Donnell · Longmeadow, US
• John P. Wesson · Vernon, US
• William C. Perron · Bristol, US
• Douglas E. Logan · Burlington, US
• Kathryn Rauss Sherrick · Bristol, US
• Richard Michael Phillips · Louisville, US
• Peter Schreiner · Mishawaka, US
• Pierangelo Jotti · Wohlen, CH

Key dates

• Filing date: Mar 15, 2004
• Grant date: May 28, 2013
• Expiry date: Nov 6, 2027

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D07B2501/2007
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An elevator load bearing member assembly includes at least one roughened surface (46) on a polyurethane jacket (44). In one example, mechanical roughening is used to roughen the surface (46) after the jacket has been extruded onto tension members (42). In another example, the temperatures used for molding a jacket (44) are controlled to induce melt fracture and roughen the surface (46) 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.