Internal thread-producing tool and method
Patent 5993120 Issued on November 30, 1999. Estimated Expiration Date: 
April 13, 2018. 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.
April 13, 2018. 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 83371 3153885 Fluted tap Screw tap with lubrication and extraction bores Threading tap Patent #: 5487626 InventorAssigneeApplicationNo. 058851 filed on 04/13/1998US Classes:408/59, Conducting channel extending to end of tool408/222, Extending outwardly from tool-axis470/198TapExaminersPrimary: Howell, Daniel W.Attorney, Agent or FirmForeign Patent References
International ClassesB23B 051/06B23G 005/06 Foreign Application Priority Data1997-04-11 SEAbstractA thread-producing tool for producing an internal thread includes a body forming a rear shank portion and a front cutting portion. Provided in the body is a lubricant storage chamber for storing liquid lubricant which is driven toward the cutting portion through discharge passages under the action of centrifugal force during a thread-cutting operation. | |
