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US 5,123,688 AGranted
Automobile bumper having smooth surface and manufactured by a blow molding process
AssigneeTonen Sekiyukagaku Kabushiki Kaisha
InventorsYutaka Takado, Masayuki Yamazaki, Takashi Mikami, Tetsuo Tomiyama
Life of this patent
Estimating the term…
Abstract
A high shock-absorbing automobile bumper with a smooth outer surface which may be manufactured by loading a preformed surface skin member into a blow mold, and then blowing a parison in the mold so that the blow parison is bonded to the surface skin member. The result is a hollow cushioning body firmly bonded to the surface skin member.
Claims2
An automobile bumper comprising:
- (a) a surface skin member made of a thermoplastic resin composition and having a smooth outer surface and a rear surface formed with a plurality of locking ridges, said locking ridges projecting rearwardly from said rear surface;
- (b) a hollow cushioning body having an encircling perimeter and made of a thermoplastic resin composition and formed by a blow molding method in the presence of said surface skin member in a blow mold such that it is firmly bonded to said surface skin member by mechanical engagement of said locking ridges with recesses in a front surface of said hollow cushioning body, said hollow cushioning body having a rear wall provided with an inward recess for absorbing the energy of shocks;
- and
- (c) a reinforcing member fixed to said surface skin member and said hollow cushioning body.
1 more element
Dependencies are inferred from the claim text.