John Hetrick’s invention was the first prototype of today’s modern air bags and derived from an accident on a Sunday afternoon drive. In the spring of 1952, Hetrick, his wife and daughter went for a car ride in their 1948 Chrysler Windsor. The car veered into a ditch on the side of the road to avoid an on-road collision.
Hetrick recalled “As I applied the brakes, both my wife and I threw our hands up to keep our daughter from hitting the dashboard … during the ride home, I couldn’t stop thinking about the accident. I asked myself: ‘Why couldn’t some object come out to stop you from striking the inside of the car?'”
As a retired industrial engineer technician, Hetrick was concerned that there was not a device in the car to cushion the impact of an accident between the vehicle’s interior and the passengers. Hetrick used his experience working with the Navy to create a safety device for vehicles. He received U.S. patent 2,649,311 for “safety cushion assembly for automotive vehicles” on August 18, 1953.
German inventor, Walter Linderer received German patent 896,312 on November 12, 1953. Linderer’s system involved a compressed air system, which was released by the driver or bumper contact. Later research concluded that compressed air could not expand and fill the bag fast enough for maximum safety.
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