Patent · US Expired

Belt retractor with a belt pretensioner acting on the belt drum

US5443222A · kind A · utility

25Cited by

7References

8Claims

0Family size

Assignee

TRW Repa GmbH · DE

Inventors

Thomas Modinger · Alfdorf, DE
Johannes Schmid · Schwäbisch Gmünd, DE

Key dates

Filing date	Jul 8, 1993
Grant date	Aug 22, 1995
Priority date	—
Expiry date	Jul 8, 2013

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60R2022/468
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

The belt retractor with a belt pretensioner acting on the belt drum (12) has a pyrotechnical piston and cylinder linear drive (22). A rack (32) adapted to be subjected to thrust is connected with the piston (28) of such linear drive (22). The rack (32) is able to be drivingly coupled with the belt drum by the intermediary of a step-up gear wheel transmission (34, 36, 44). After tensioning of the belt, tensions in the safety belt system are limited by plastic deformation of a torsion rod (38), and peak strain values are decreased. The belt retractor is integrated with the belt pretensioner and the energy converter as a compact assembly.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.