The invention disclosed herein relates to a multipositional ratchet device for use in conjunction with a surgical retractor assembly. The ratchet device of the invention permits both independent and simultaneous adjustment of the longitudinal axial positioning of a retractor blade stem relative to the...http://www.google.fr/patents/US6958038?utm_source=gb-gplus-shareBrevet US6958038 - Multipositional ratchet device for surgical retractor
Multipositional ratchet device for surgical retractor
