Patent ID: 9409544
Filing Date: 2016-08-09
CPC Classification: B60R

Claim Text:
1. An active bolster for mounting at an interior trim surface of a passenger compartment in an automotive vehicle, comprising: a plastic-molded front wall for deploying in a deployment direction toward a passenger in the passenger compartment; a plastic-molded expandable bladder member joined along an outer perimeter with the front wall by a weld seam to form an inflatable bladder, wherein the weld seam has a nominal separation pressure; and an inflator for coupling an inflation gas into the inflatable bladder in response to a crash event of the vehicle; wherein the bladder member includes a plurality of vent openings configured to regulate an inflation pressure of the inflation gas during an impact according to a passenger restraint profile; and wherein the bladder member includes at least one stress relief vent comprising a frangible tear seam partially cut into the bladder member configured to tear open at a predetermined pressure between the passenger restraint profile and the nominal separation pressure.