Vehicle bumper with combination foam and air bag energy absorber

Details Vehicle bumper with combination foam and air bag energy absorber Vehicle bumper with combination foam and air bag energy absorber

1991-06-28

1992-04-21

Song, Robert R.

Vehicle fenders

Buffer or bumper type

Having fluid means within impact means to absorb energy

293109, B60R 1920

Patent

active

051061376

ABSTRACT:
A vehicle bumper assembly has a fascia covering a layer of compressible energy absorbing plastic material with a cavity formed therein; the cavity contains an inflatable bladder connected at a header plate to a fill port and an exhaust port. The exhaust port is connected to a relief valve and an orifice for controlling exhaust of gas from the inflatable bladder to control the point at which deflation of the air bag starts and the rate of deflation; the fill port is connected to a gas source operative in response to vehicle impact to generate a gas charge for inflating the bladder to fill the cavity and provide energy absorbing capacity in addition to that provided by the compressible energy absorbing plastic material. In another embodiment the bladder is preinflated to fill the cavity and the exhaust port is normally closed but responsive to vehicle impact to define an opening through valve controlling the point deflation starts and the rate of deflation to establish an energy absorption rate in addition to that of the compressible energy absorbing plastic material.

REFERENCES:
patent: 3494607 (1970-02-01), Rusch
patent: 3514144 (1970-05-01), Alderfer
patent: 5042859 (1991-08-01), Zhang et al.

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