Power screwdriver
Patent 5947210 Issued on September 7, 1999. Estimated Expiration Date: 
June 30, 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.
June 30, 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 ReferencesPower driven screwdriver Power transmission mechanism of power-driven rotary tools Tightening tool Power tool and mechanism Power tool clutch assembly Clutch mechanism in power driven screwdriver Continuous screw driving tool Patent #: 5687624 InventorsAssigneeApplicationNo. 107985 filed on 06/30/1998US Classes:173/178, Having torque responsive clutch173/216, Gear drive192/54.5, Cam operated192/150, Overload release227/136With means to feed strip-type carrierExaminersPrimary: Smith, Scott A.Attorney, Agent or FirmForeign Patent References
International ClassesB25B 021/00B25B 023/14 Foreign Application Priority Data1997-06-30 JPAbstractA power screwdriver has a tool body, a motor, a drive member rotatably driven by the motor, a spindle rotatably mounted on the tool body and a clutch mechanism provided between the drive member and the spindle. The clutch mechanism includes an engaging clutch and a synchronizer device. The synchronizer device is operable to rotate the spindle at a predetermined speed that is substantially equal to or less than the rotational speed of the drive member, prior to connection of the engaging clutch.Field of SearchHaving torque responsive clutchMEANS TO DRIVE TOOL ABOUT AN AXIS Gear drive Drive means responsive to torque or speed condition Cam operated Shaft thrust Overload release Positive Responsive to torque on work Rotatable, coaxial, clutching components Having complementary formations With means to feed strip-type carrier | |
