Seat belt retractor

US8047573B2 · kind B2 · utility

Assignee

• TAKATA-PETRI AG · DE

Inventors

• Udo Friedsmann · Blaustein, DE
• Hermann Hasse · Lonsee, DE
• Jochen Benz · Ulm, DE
• Jochen Lang · Ulm, DE
• Sebastian Götze · Lengefeld, DE
• Hans-Jürgen Divo · Langenau, DE
• Gerhard Klingauf · Balzheim, DE
• Carsten Felber · Allerheiligen, DE
• Robert Fleischmann · Neu-Ulm, DE
• Paul Sprongl · Ulm, DE
• Wolfgang Schrade · Ottobeuren, DE
• Christoph Pechhold · Erbach, DE

Key dates

• Filing date: Mar 11, 2010
• Grant date: Nov 1, 2011
• Expiry date: Mar 11, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2022/468
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A seat belt retractor for a safety belt including a seat belt spindle for winding up and unwinding the safety belt and a tensioning drive. The seat belt spindle includes a gas generator, a drive wheel and a supply pipe which connects the gas generator and the drive wheel. A plurality of thrust members are present in the supply pipe which, after triggering the gas generator, are accelerated and indirectly or directly drive the drive wheel for winding up the safety belt. An inertia coupling is arranged between the drive wheel and the seat belt spindle. The inertia coupling comprises coupling elements which, during an acceleration of the drive wheel, pivot outward and are directly or indirectly coupled to the seat belt spindle.