Rocker-bogie
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The rocker-bogie system is a suspension arrangement invented by NASA engineer Donald B. Bickler in 1988 for use in NASA's Mars rover Sojourner, and which has since become NASA's favored design for rov
A rocker bogie
Rocker bogie on Curiosity
Early wooden model of Bickler's articulated suspension design.
The “Bickler Pantograph”, an early rover prototype, pictured in Bickler's garage.
Whippletree (mechanism)
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A whippletree, or whiffletree, is a mechanism to distribute force evenly through linkages. It is also referred to as an equalizer, leader bar, or double tree. It consists of a bar pivoted at or near t
A set of whippletrees or leader-bars for the two leaders of a four-horse team
A standard automobile windscreen wiper uses whippletrees in compression to distribute the force of the wiper arm evenly across the blade.
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