Dental positioning device

Claim 1

A POSITIONING DEVICE USEFUL FOR PREPARING PARALLEL HOLES IN SAID SURFACES ON TEETH, COMPRISING: (A) A MOUNTING MEMBER ADAPTED TO BE SUPPORTED BY THE AXIAL AND OCCLUSAL SURFACES OF THE TEETH ON ONE SIDE OF A JAW, SAID MEMBER INCLUDING A FIRST PORTION DEFINING THE LOCATION OF SAID MOUNTING MEMBER AND A SECOND, EXTENSION PORTION; (B) JOINT MEANS SUPPORTED BY THE EXTENSION PORTION OF THE MOUNTING MEMBER, SAID MEANS INCLUDING A BEARING ELEMENT FOR RECEIVING THE POSITIONING ROD OF THE PARALLELOGRAM LINKAGE DEFINED HEREINAFTER AND GRIPPING MEANS FOR RIGIDLY FIXING SAID ELEMENT IN ALIGNMENT WITH ANY PREDETERMINED OPERATING AXIS; (C) A PARALLELOGRAM LINKAGE SECURED TO SAID JOINT MEANS AND BEING DISPLACED FROM SAID MOUNTING MEMBER, SAID LINKAGE INCLUDING: (1) A POSITIONING ROD PIVOTALLY SUPPORTED BY THE JOINT MEANS AND HAVING AT LEAST A PORTION THEREOF EXTENDING IN ALIGNMENT WITH SAID OPERATING AXIS; (2) A TRANSVERSE LINKAGE PIVOTALLY SECURED TO SAID POSITIONING ROD, AND (3) AN OPERATING ROD PIVOTALLY SECURED TO SAID TRANSVERSE LINKAGE AND HAVING AT LEAST A PORTION THEREOF EXTENDING PARALLEL TO AID OPERATING AXIS; AND (D) A HOLDER FOR SUPPORTING A DENTAL TOOL ALIGNED WITH SAID PREDETERMINED OPERATING AXIS AT A POINT SPACED FROM THE OPERATIVE END OF THE TOOL, THE HOLDER BEING SECURED TO SAID OPERATING ROD IN ORDER THAT THE DENTAL TOOL SUPPORTED THEREBY MAY OPERATE ON A PLURALITY OF TEETH ON THE PORTION OF THE JAW NOT SUPPORTING THE MOUNTING MEMBER.