Patent ID: 8210847

Claim:
A dental instrument driven by compressed air comprising: an elongated body comprising: a first shell half, a second shell half, and a core, the shell halves joined to form an exterior surface for manual manipulation, the halves forming a cavity, the cavity comprising various passageways as fluid conduits; a base comprising a plurality of conduits, the base communicating with an outside source of light and fluid through the conduits, the conduits communicating with the passageways defined by the elongated body; a head located at the opposite end from the base, the head comprising a turbine shaft rotatably mounted within the head, a turbine impeller, the turbine impeller connected to the turbine shaft, the turbine impeller being driven by an outside source of air through an air nozzle to rotate a dental bit; at least one opening located under the head configured to deliver fluid away from the dental instrument; and at least one opening located under the head configured to deliver light away from the dental instrument, wherein the core comprises a flow deflector located on the end of the core nearest the head, the flow deflector projecting further towards the first shell half than towards the second shell half, an edge of the flow deflector forming a part of the nozzle, and wherein the flow deflector comprises protrusions on upper and lower portions of the flow deflector, the protrusions configured to mate the flow deflector and core to the first shell half.