Land vehicles – Wheeled – Attachment
Patent
1976-01-12
1978-12-19
Silverstrim, John P.
Land vehicles
Wheeled
Attachment
280729, 280733, 280734, 280738, 280739, 280742, 285238, B60R 2108
Patent
active
041302982
ABSTRACT:
A system for restraining and protecting the driver and passengers on the front seat of an automotive vehicle against injury as a result of a collision with another vehicle or object, wherein an expansible bag is stored in a folded, inoperative position in a compartment on the underside of the roof of the vehicle and generally overlying the laps of the driver and passengers. A pair of elongated arms are pivotally mounted in the vehicle for movement between an upwardly inclined, inoperative position adjacent the windshield posts of the vehicle to a downwardly inclined, operative position adjacent the inner sides of the side doors of the vehicle. The distal ends of the arms are connected to the expansible bag and serve to rapidly withdraw and unfold the same from the storage compartment when the system is triggered. After the bag is unfolded and deployed, fluid under pressure is supplied to a pair of laterally spaced compartments in the bag through passages in the arms. A central compartment of the bag inflates with air at atmospheric pressure as a result of inflation of the laterally spaced compartments.
A lost motion connection between the piston and plunger rod of each piston and cylinder assembly permits the rod to extend an additional incremental amount, whenever the bag is subjected to the forward force of the bodies of the driver and passengers, so that a vent valve in each assembly is shifted to a position causing a respective one of the pressurized compartments of the bag to be vented to the atmosphere and deflate at a controlled rate.
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