Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2006-09-26
2006-09-26
Duda, Rina (Department: 2837)
Electricity: motive power systems
Constant motor current, load and/or torque control
C318S434000, C318S599000, C388S907500, C388S937000
Reexamination Certificate
active
07112934
ABSTRACT:
A power tool such as an electric drill typically contains a gear train that couples the output spindle of the motor to the tool bit-receiving chuck. The control circuit for the power tool is operable in a ratcheting or pulse mode that causes the output spindle to rotate in discrete incremental amounts. Corresponding methods for controlling the operation of the electric motor of a power tool are also disclosed.
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Black & Decker Inc.
Duda Rina
Harness & Dickey & Pierce P.L.C.
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