Articulator for use in making dentures or parts thereof

Claim 1

An articulator, for use in making dentures or parts thereof, comprising a lower and an upper principal member which are interconnected by means of a condylar mechanism that allows relative movement between said principal members, one of said principal members being provided with condylar track members that are included in said condylar mechanism, the other of said principal members being provided with a condylar shaft means which comprises two shaft members, each of which has an end portion axially displaceably inserted into a bore in a condylar ball that is mounted in one of said condylar track members, said two shaft members being mutually movable in an axial direction and being interconnected by an intermediate part, characterized in that said condylar shaft means comprises adjustment means enabling simultaneous axial movement of said shaft members in opposite directions, said adjustment means comprising a rotatable wheel means which is held axially fixed in an opening in said one principal member, and which is rotatable together with the intermediate part to displace said shaft members, each of said shaft members being non-rotatably mounted in said one principal member and being in threaded engagement with said intermediate part, which has two oppositely directed threads, one for each shaft member.