Flywheel driven fastener driving tool and drive unit

Details Flywheel driven fastener driving tool and drive unit Flywheel driven fastener driving tool and drive unit

B - Operations, Transporting

27

F

B27F 7/02 (2006.01) B25C 1/00 (2006.01) B25C 1/06 (2006.01)

Patent

CA 2139529

A power tool has a flywheel for driving a working member such as the driver of a fastener tool. A motor mounted at a rear end of a tool handle drives the flywheel mounted in a tool housing at the forward end of the handle. A cable is secured to a drum and to the working member. A clutch selectively couples the flywheel to the drum to wind up the cable and drive the working member forcefully. A return cable is wound on the driver drum against a spring bias to rewind the drum, unwind the cable and return the working member to its prior status when the clutch decouples the flywheel from the drum. When the flywheel is coupled to the drum, the motor speed and flywheel speed is reduced. An electronic control operates the motor to recapture the initial speed within 500 milliseconds of the speed reduction. The electronic control includes a phase-locked loop velocity control.

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