Patent ID: 6315560
Filing Date: 2001-11-13
Classification: A61C

Abstract:
A high-speed drill comprising a handpiece having a drill head at an end thereof, said drill head having a turbine assembly supported in a turbine chamber inside said drill head, said turbine assembly having a chuck rotatably secured between bearings, an impeller secured about said chuck and aligned with an air inlet port in a sidewall of said turbine chamber, an exhaust port in said sidewall, conduit means in said handpiece to direct air pressure to said air inlet port to drive said turbine and rotate said chuck, said chuck having a work bit engaging free end which is exteriorly accessible, an insert removably secured to said drill head and providing access to said turbine chamber, said insert having a smooth conical tapered circumferential external sidewall adapted for frictional engagement by a mating conical bore of a conical key for the removal and connection of said insert, said insert being threadably engaged in an access opening of said turbine chamber to provide quick access for lubricating or changing parts inside said spherical drill head.