Drilling or milling apparatus for the working of live bone, particularly for dentistry

US4021920A · kind A · utility

Inventors

• Horst Kirschner · Brackenheim, DE
• Wolfgang Meyer · Erlangen, DE

Key dates

• Filing date: Mar 13, 1975
• Grant date: May 10, 1977
• Expiry date: Mar 13, 1995

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2017/1651
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Cooling means for bone or tooth cutting tool. In order to cool the cutting surfaces of a bone or tooth cutting tool, there is provided in the supporting shank of the cutting tool a first chamber containing the driving means for the tool and a second chamber within or communicating with the cutting tool itself, said two chambers being separated by a perforable diaphragm seal. Conduit means for introducing cooling media into the interior of said tool is received into a suitable recess in the upper portion of the tool housing, extends through said first chamber and is provided with a pointed tip for piercing said diaphragm seal for extending into said second chamber. Cooling media is then introduced into the interior of said tool and exits therefrom for cooling both the tool itself and the material being cut.