Lever arm shock absorber
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Lever arm shock absorbers were the first form of hydraulic shock absorber or damper used for car suspension. They appeared in the 1930s and were most commonly used in the 1950s and 1960s, but were rep
Rotary vane shock absorber, 1935
Front suspension, with a lever arm shock absorber forming an upper wishbone
Ralph Peo
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Ralph Frederick Peo was an American inventor, engineer, business executive in the automobile industry, and the holder of 150 patents. He was founder of Frontier Industries in Buffalo, New York and was
Lever arm shock absorber
…was awarded in 1925 to Georges de Ram, who was already an established maker of friction disk shock absorbers. Hydraulic shock absorbers, invented by Ralph Peo in 1930, appeared as a development to replace the previous friction disks. These had, at best, provided a constant damping force, no matter what the…
Peo c. 1959