Self-actuating keyless chuck
Patent 4840387 Issued on June 20, 1989. Estimated Expiration Date: 
January 20, 2008. 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.
January 20, 2008. 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 ReferencesKeyless chuck Quick operating chuck Automatic jaw control for reversible power tool Keyless tool chuck Keyless impacting chuck Patent #: 4682918 InventorAssigneeApplicationNo. 07/146279 filed on 01/20/1988US Classes:279/134, SEPARATE CHUCK-ACTUATING POWER SOURCE279/61, Threaded sleeve and jaw279/902KEYLESS TYPE SOCKETExaminersPrimary: LaRoche, Eugene R.Assistant: McCutcheon, Nathan W. Attorney, Agent or FirmInternational ClassB23B 31/12 (20060101)AbstractA self-actuating keyless chuck for use with a reversible powered driver is disclosed. The chuck comprises a body which carries a rotatable split nut and a plurality of slidable jaws driven by the rotatable nut. A sleeve member is rotatably connected to the body and carries an impact ring provided with a first impact dog. A second impact dog is associated with the split nut. Spring means are provided to bias the first impact dog toward engagement with the second impact dog whereby the jaws will be tightened or loosened whenever the rotation of the sleeve is restrained and the powered driver is actuated. | |
