Patent · US Active

Belt retractor for a safety belt system and method of determining the belt webbing unwinding in a belt retractor

US7992817B2 · kind B2 · utility

4Cited by

8References

17Claims

0Family size

Assignee

TRW AUTOMOTIVE GMBH · DE

Inventors

Wolfgang Holbein · Alfdorf, DE
Artur Klein · Lorch, DE
Michael Stuetz · Radolfzell, DE

Key dates

Filing date	Oct 16, 2007
Grant date	Aug 9, 2011
Priority date	—
Expiry date	Jun 19, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60R2022/4825
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A belt retractor for a safety belt system includes a frame, a belt reel rotatably mounted in the frame, a force limiter, a locking mechanism which couples the belt reel in a restraint case to the frame via the force limiter, and a belt webbing unwinding measuring means which includes a signal transmitter and at least one sensor. The sensor is associated with the signal transmitter and detects a change in a magnetic field. At least upon activation of the locking mechanism the signal transmitter is coupled to the belt reel such that it generates a signal upon rotation of the belt reel.

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