Patent ID: 8162074

Claim:
An ergonomic hand-held power tool; said power tool being electrically powered; said power tool having an electric motor; said power tool having an electric power supply; said power tool having control circuitry to control power tool operations, including energizing and de-energizing said power tool; said power tool comprising: a substantially rigid control-housing sheath defining an inner volume to house user controls and having an outer surface for the mounting of said power-tool motor, wherein said control-housing sheath has a closed upper region and has a lower region, wherein said closed upper region of said control-housing sheath defines the top of said control-housing sheath and said lower region of said control-housing sheath defines the bottom of said control-housing sheath, and wherein said control-housing sheath is adapted to receive a user's hand and wrist in said inner volume; a grip-controller assembly mechanically coupled to said control-housing sheath within said inner volume for a user's hand to grip, wherein said grip-controller assembly is adapted to be electrically coupled with said power-tool motor and contains portions of said control circuitry to facilitate user control over said power-tool energizing operations, and wherein said grip-controller assembly is oriented such that when a user's hand is engaged with said grip-controller assembly, the top of a user's gripping hand is oriented toward said top of said control-housing sheath, a device adapted to mechanically and electrically receive and couple to said power-tool motor, which is adapted to mate with said mechanical and electrical coupling device, wherein said device that is adapted to mechanically and electrically receive and couple to a power-tool motor is disposed at the top of said control-housing sheath; and a sheath-to-user-arm-securing device that adapts said control-housing sheath to be able to substantially secure the wrist and/or lower forearm of a user to the control end of said control-housing sheath, wherein when a user's hand and wrist are engaged with said control-housing sheath, including said grip-controller assembly, the axis of the user's hand and wrist is on a different, yet substantially parallel axis as that of said mounted power-tool motor with the user's engaged hand and wrist substantially located directly below said coupled power-tool motor; whereby a user can exert directional force of said power tool using said control-housing sheath with said grip-controller assembly.