Automatic seat belt retractor
AssigneeGM Global Technology Operations LLC
InventorsThomas JENNY, Juergen MAIER
Life of this patent
Estimating the term…
Abstract
An automatic seat belt retractor includes a belt reel configured to wind a seat belt and a sensor configured to permanently record a rotational speed of the belt reel. The sensor cooperates with an element that is speed-coupled to the belt reel to record the rotational speed. The automatic seat belt retractor includes a brake unit configured to decelerate the seat belt being unwound from the belt reel with a restraining force and a control module configured to control the brake unit with respect to the restraining force as a function of the rotational speed.
Claims15
1-14. (canceled)
An automatic seat belt retractor comprising:
- a belt reel configured to wind a seat belt;
- a sensor configured to permanently record a rotational speed of the belt reel (20), wherein the sensor cooperates an element speed-coupled to the belt reel for recording the rotational;
- a brake unit configured to decelerate the seat belt from being unwound from the belt reel with a restraining force;
- and
- a control module configured to control the brake unit as a function of the rotational speed.
Dependencies are inferred from the claim text.