Seat belt retractor
AssigneeBreed Automotive Technology, Inc.
InventorsMartin Specht, Thomas Kilian, Walter Krauss
Life of this patent
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Abstract
A seat belt retractor has a belt reel for the seat belt webbing. A load limiter allows limited extraction of the belt webbing with energy absorption when the belt reel is blocked. The absorption of energy is adjustable as a function of crash-related data and the rotating movement of the belt reel is scanned for this purpose when the extraction of the belt webbing is limited.
Claims16
A seat belt retractor comprising a belt reel for a seat belt webbing, a load limiter which allows limited extraction of the belt webbing with energy absorption when the belt reel is blocked, an adjusting device which adjusts the load limiter as a function of crash-related data, and a scanner for generating a measurement signal derived from a rotating movement of the belt reel, wherein said scanner measures an extracted length of belt webbing and/or a velocity of extraction of belt webbing and/or an acceleration of extraction of belt webbing;
- wherein the crash-related data is indirectly determined by the rotating movement of the belt reel, wherein the scanner scans co-rotating components of the belt reel, said co-rotating components are markings or teeth of a set of blocking teeth of the belt reel applied to the belt reel at equal angular intervals.
Dependencies are inferred from the claim text.