A positioning device for positioning an instrument in three dimensions, the device comprising at least one arm which is essentially rigid having a first end and a second end, the second end being hinged relative to a support stand via at least one hinge axis, and said instrument being mounted on a support...http://www.google.fr/patents/US5170790?utm_source=gb-gplus-shareBrevet US5170790 - Arm having an end movable in translation, and therapeutic treatment apparatus constituting an application thereof
Arm having an end movable in translation, and therapeutic treatment ...
