Disposable dental drill assembly
Patent 3955284 Issued on May 11, 1976. Estimated Expiration Date: 
May 11, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 11, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2033662 2799934 2945299 3128988 3210847 3298103 3408043 3593425 3624905 InventorApplicationNo. 537960 filed on 01/02/1975US 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 handpieceExaminersPrimary: Peshock, RobertAssistant: Lever, Jack Q. Attorney, Agent or FirmAbstractA 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. | |
