Self-adjusting knee bolster

Abstract From the Canadian patent

A knee bolster for protecting the passengers of a motor vehicle comprises one or more deformable members positioned generally forward of each vehicle passenger; ultrasonic sensors for determining the position of the knees and tibiae of each passenger within the motor vehicle relative to the deformable members; and means responsive to the sensing means for articulating and translating each deformable member relative to the vehicle interior and, hence relative to, the knees and tibiae of each passenger corresponding thereto to provide optimum protection to the passengers in the event of a subsequent collision or marked vehicle deceleration.