Impact absorbing member and head protective member
AssigneeBridgestone Corporation
InventorsTatsuo Yata, Hiroshi Kaneda
Life of this patent
Estimating the term…
Abstract
To provide an impact absorbing member for use in vehicles which has excellent energy absorbing capacity and is suitably adapted to absorb impact energy exerted on the head of an occupant in a vehicle cabin to reduce the head injury criteria value in the event of a vehicle collision. An impact absorbing member 1 is a plate-like impact absorbing member 1 made of rigid polyurethane foam and has recesses 3 formed in at least one surface thereof such that the recesses 3 are arranged in parallel along one direction. The shape of each recess 3 on the sectional view in the depth direction of the impact absorbing member 1 is a triangle to have sectional area decreasing toward the deepest point.
Claims15
An impact absorbing member made of rigid polyurethane foam which has a shape of a plate, and which has recesses in at least one surface thereof to be arranged in parallel along one direction,
- wherein each recess is formed in such a shape as to have sectional area decreasing toward the deepest point.
A head protective member which is formed in a lengthy rectangular shape and is constituted of a rigid polyurethane foam having hardness of 0.3 MPa or more,
- wherein the thickness of the head protective member is 15 to 25 mm, and the effective width of portions mainly absorbing impact is 30 to 40 mm.
Dependencies are inferred from the claim text.