Patent ID: 6623221
Filing Date: 2003-09-23
Classification: A61C,Y10T

Abstract:
An articulated milling arm for a milling instrument, comprising:a milling arm support, movably attached to a frame which allows 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 being provided with a braking surface; and a movable braking plate, provided on the middle portion of the milling arm, which movably contacts the braking surface of the first vertical axle and the braking surface of the second vertical axle by a common brake-activating device which includes a pneumatically or hydraulically pressurizable diaphragm, wherein a pressure chamber is provided on a side of the diaphragm opposite the movable braking plate, which pressure chamber is pressurized pneumatically or hydraulically, thereby causing the diaphragm, to bear against the braking plate.