Patent ID: 7434833
Filing Date: 2008-10-14
Classification: B60R

Abstract:
1. A seat belt device for a vehicle, comprising: an inflatable bag portion provided at a seat belt for protecting an occupant and adapted to receive inflation air; a blower device operative to repeatedly supply the inflation air to said bag portion; an air supply passage connecting said bag portion with said blower device; an air supply control device operative to supply the inflation air from said blower device to said bag portion so as to inflate said bag portion and discharge the supplied air from the bag portion so as to return said bag portion to a deflated initial state, whereby an inflation operation of said inflatable bag portion can be reused; a detecting device operative to detect a high likelihood of an occurrence of vehicle crash, wherein the inflation air is supplied to said bag portion to inflate said bag portion when the high likelihood of the occurrence of vehicle crash is detected by said detecting device; a valve which is provided at said air supply passage, and a valve control device operative to control said valve so as to open and shut the air supply passage according to a control condition; and a vehicle-crash detecting device operative to detect a real occurrence of vehicle crash, wherein said valve is controlled so as to shut the air supply passage when the real occurrence of vehicle crash has been detected by said vehicle-crash detecting device after a supply of the inflation air to said bag portion had started.