Gear cutting – milling – or planing – Milling – Randomly manipulated – work supported – or work following device
Patent
1996-11-18
1998-04-28
Pitts, A. L.
Gear cutting, milling, or planing
Milling
Randomly manipulated, work supported, or work following device
144 486, 1441545, 409205, 409211, 433 51, 433223, 451358, B23C 120
Patent
active
057436860
ABSTRACT:
A pattern sizing tool for use as a milling device for removing a portion of a surface of a stiff material to leave a desired thickness of material and is particularly useful for milling a hard plastic coping like that produced in a tooth replacement procedure for forming, from that coping, a crown as a replacement tooth in a practice of a "lost wax casting procedure". The tool includes a pair of upper and lower arms that are coupled together at their ends to be scissored and are spring biased apart. The upper arm includes a mount with an arrangement for maintaining a dental rotary grinder thereon that has a chuck for mounting a milling burr. The milling burr has a surface opposite to an end of a footing that is maintained to extend from the lower arm whereby, when a dental technician manually moves the tool arms together the milling burr surface is moved towards the footing end whereon that technician has positioned a hard plastic coping, or the like, that is preferably formed from a light cure resinous material. The tool includes a stop to limit travel of the turning milling burr surface towards the footing end and is used by the technician to mill the coping to a desired wall thickness, by the technician manually moving the arms together, and repositioning the coping on the footing who repeats the process until the entire coping surface has been milled.
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patent: 5150993 (1992-09-01), Miller
Kirkman Christopher
Pitts A. L.
Russell M. Reid
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