Patent ID: 6146137
Filing Date: 2000-11-14
Classification: A61C,Y10S

Abstract:
A handpieces instrument comprising:a hollow body having a front end and a rear end, said body having a gas inlet port and a gas outlet port, said gas inlet port and said gas outlet port being mounted near the front end of the hollow body, said gas inlet port being connected to a conduit to provide a source of pressurized gas from a remote source;said gas outlet port having a one way valve associated with said port to normally prevent the flow of gas into said hollow body and to permit the flow of gas from the hollow body when there is sufficient internal gas pressure within the body at the gas outlet port;said one way valve associated with said gas outlet port being a flexible pinch valve having a gas passageway normally closed under atmospheric pressure and mounted external to said hollow body;a gas driven turbine assembly mounted within said hollow body and in gaseous communication with said gas inlet port and said gas outlet port;said turbine assembly having surface impellers and a center shaft with a length that is rotatable in unison with the surface impellers;said impeller being rotatable when sufficient pressurized gas from a remote source impinges upon said impeller through said gas inlet port; anda front mounted bur end with a length, said bur end being mounted in generally straight axial alignment with the length of said center shaft of the turbine assembly and movable with said turbine assembly's center shaft.