Belt retractor with two force-limiting devices acting in parallel

US9327681B2 · kind B2 · utility

Assignee

• Autoliv Development AB · SE

Inventors

• Klaus-Peter Singer · Hamburg, DE
• Ronald Jabusch · Elmshorn, DE

Key dates

• Filing date: Nov 7, 2012
• Grant date: May 3, 2016
• Expiry date: Jan 1, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2022/287
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A seat belt retractor including a belt shaft rotatably supported in a frame and two force-limiting devices acting in parallel. The first and the second part of the belt shaft axially overlap forming an annular space. The second force-limiting device is a band element abutting a radial outer wall of the annular space with a first section, and on the radial inner wall with a second section and is deflected in a deflection fitting between the first and the second sections (20, 21, 29, 30). During relative movement between the first and second parts, the band element can be unwound or wound up from the outer wall onto the inner wall or vice versa in an energy-dissipating manner.