Vehicle fenders – Buffer or bumper type – Composite bumper
Reexamination Certificate
2007-05-29
2007-05-29
Morrow, Jason (Department: 3612)
Vehicle fenders
Buffer or bumper type
Composite bumper
C293S121000
Reexamination Certificate
active
11468147
ABSTRACT:
A bumper system includes a tubular beam and a thermoformed energy absorber with crush boxes formed into a base flange, such as by vacuum or thermoforming processes. The crush boxes have planar energy-absorbing sidewalls a depth of about 10 mm to 35 mm, wall thicknesses of about 1 mm to 3 mm, and are formed from polyethylene or other thermoform materials having a memory. The base flange can include thermoformed features engaging recesses in the beam, and is combinable with injection-molded or foam energy absorbers for design flexibility. In one form, the energy absorber includes a thermoformed first sheet forming crush boxes and a second sheet bonded to the first sheet to define apertured air pockets. A method of manufacture includes providing a plurality of separately usable thermoformed energy absorbers which can be used in conjunction with a common vehicle structure to vary the absorption characteristics of a vehicle bumper.
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Evans Darin
Guiles Melvin
Morrow Jason
Netshape Energy Management LLC
Price Heneveld Cooper DeWitt & Litton LLP
LandOfFree
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