Degudent Gmbh

Degussa Dental Gmbh

Gerd Schostek

Hartmut Brinkmann

Klaus-Dietrich Lingemann

Otto Finke

Axel H&ouml;h

An articulated milling arm for a milling instrument, which includes a milling arm support movably attached to a frame to allow vertical displacement of the milling arm support; a first vertical axle, rotatably connecting the first milling arm support to a middle portion of the milling arm to allow swiveling of the middle portion of the milling arm horizontally about a vertical axis of the first vertical axle, the first vertical axle being provided with a braking surface; a second vertical axle, rotatably connecting the middle portion of the milling arm to a milling unit support to allow swiveling of the milling unit support horizontally about a vertical axis of the second vertical axle, the second vertical axle also being provided with a braking surface. The milling arm is provided with a movable braking plate, on the middle portion of the milling arm, which movably contacts the braking surface of the first vertical axle and the breaking surface of the second vertical axle. The invention further provides that the common braking plate is pressurized pneumatically or hydraulically via a diaphragm which presses against the braking surfaces of the two vertical axles in order to fix the articulated milling arm horizontally.

Articulated milling arm for a dental milling instrument

A dental milling instrument includes a base connected to a guide column for a vertically adjustable milling arm which receives a milling unit. The milling arm can be displaced by its supporting slide along a guideway of the guide column, by means of an electromotive height-adjusting drive. A threaded spindle, capable of being driven by an adjusting motor, is in engagement in a backlash-free and self-locking manner with a spindle nut provided in the supporting slide. Vertical positioning and vertical fixation are accomplished entirely from an operating panel provided on the base.

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Gelnhausen, Germany

Gerd Schostek