Airbags were invented and patented in the 1950s to cushion the impact and prevent or lessen injuries sustained in auto accidents. Studies show that thousands of lives have been saved by air bags, with fatalities reduced by up to 46 percent in airbag-equipped vehicles, but it is difficult to determine an exact number.
Airbags help prevent an occupant’s head from striking some part of the inside of the vehicle, and help distribute crash forces more evenly across the victim’s body. However, their rapid deployment can cause injuries or death.
After an impact, it takes only 1/20 of a second for an airbag to inflate and each bag is filled with gas. The first crash-sensing detector was introduced in the late 1960s, leading to airbag systems where the sensor or accelerometer triggers ignition of a gas generator to rapidly inflate the bag. The bag then absorbs some of the deceleration forces experienced when the occupant collides with and collapses it while the gas escapes through small vent holes during the next 3/10 of a second.
(more…)