Dual stage energy absorber

US7568746B2 · kind B2 · utility

Assignee

• Sabic Innovative Plastics B.V. · NL

Inventors

• Eric Jon Jaarda · Milan, US
• Michael Mahfet · Rochester Hills, US
• Subhransu Sekhar Mohapatra · Bengaluru, IN
• Dhanendra Kumar Nagwanshi · Farmington Hills, US
• Sreeram Ramani · Poonamallee, IN

Key dates

• Filing date: Apr 26, 2007
• Grant date: Aug 4, 2009
• Expiry date: Jul 22, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2019/1893
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A motor vehicle bumper that has enhanced energy absorption characteristics and that includes one or more unique geometry configurations that extend “softer” energy absorbing surfaces forward in the system while nesting more “rigid” energy absorbing surfaces more rearward only to come into effect when higher energy impacts are observed. The dual energy absorption may be achieved using a number of configurations and/or methods or a combination of several. In one or more embodiments, the wall thickness of the material used in the component or components may be varied, materials having different stiffness properties may be used, and/or geometries of different depth and section stiffness may be alternated across the bumper system.