ApplicationNo. 537960 filed on 01/02/1975
US Classes:433/132, Rotary fluid turbine415/904, TOOL DRIVE TURBINE (E.G., DENTAL DRILL, ETC.)433/126Having means facilitating assembly or disassembly of tool or handpiece
ExaminersPrimary: Peshock, Robert
Assistant: Lever, Jack Q.
Attorney, Agent or Firm
AbstractA disposable dental drill assembly is disclosed in this application and includes a housing in which is rotatably carried a rotor member including a turbine blade configuration and which is fixed to the end of a dental burr. The housing is formed with interlock means cooperating with complimentary means formed on a handle member whereby the drill assembly is easily removable from the handle member and can be replaced when the burr wears out. Both the housing and handle are formed with air passages and the handle is connected to a source of air pressure so that air flows over the turbine blades driving the rotor member and, accordingly, the burr. Because the drill assembly is disposable, the housing and the rotor member, including the turbine blade configuration, are made of a relatively inexpensive plastic material which can also be utilized for the handle member.