A universal clamp for an adjustable post includes a split base clamp mounted on a stationary supporting stud. An elongated channel in the form of a yoke including a rigid extension protruding through the split base clamp slidably supports a pair of opposed jaws adapted to engage the post. The channel...http://www.google.fr/patents/US4383351?utm_source=gb-gplus-shareBrevet US4383351 - Universal clamp
