Animation of the Klann linkage, a <a href="https://en.wikipedia.org/wiki/leg_mechanism" class="extiw" title="w:leg mechanism">leg mechanism</a> proposed in patent US6260862B1
<a href="//commons.wikimedia.org/wiki/User:MichaelFrey" title="User:MichaelFrey">MichaelFrey</a>
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<span class="int-own-work" lang="en">Own work</span>