Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
January 27, 2009
Patent Application Number
11557331
Date Filed
November 7, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
A vehicle seat belt device includes an electric motor for retracting a loose portion of a seat belt during an emergency in a vehicle, and a control unit for controlling the electric motor. The control unit causes the electric motor to continuously rotate only in a belt retraction direction and repeatedly alternate between low-speed rotation and high-speed rotation when an emergency condition of the vehicle is predicted. The belt tension is varied by the repeated changing of the rotational speed between high speed and low speed, and the seat belt therefore vibrates. An occupant can be alerted to a predicted emergency by this vibration.
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