Hugh DeHaven (3 March 1895 – 13 February 1980) was an American pilot, engineer and passive safety pioneer.
[2] While recuperating from a ruptured pancreas, he tried to understand why he, and only he, survived that crash,[5] noting that his cockpit was the only one that remained intact.
Between 1924 and 1933 DeHaven filed seven patent applications related to his design of a self-sharpening single edge safety razor.
Between approximately 1930 and 1936 his De Haven Razor Corporation marketed a number of different models based upon these designs.
[7] Based on his work, DeHaven published the classic Mechanical analysis of survival in falls from heights of fifty to one hundred and fifty feet, concluding that: In 1950, DeHaven published a report pointing to the second collision and the risk involved in vehicle ejection.