High power grinding tool
AssigneeBlack & Decker Inc.
InventorsCHRISTOPHER T. KING, DANIEL F. NACE, JAMES H. STILES, III
Life of this patent
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Abstract
A power tool is provided including a motor an outer diameter of smaller than or equal to 66 mm. The electric motor is configured to produce a maximum power output of greater than or equal to 2800 watts. Further, the motor drives an output spindle so as to maintain an output rotational speed of greater than 3,500 rotations-per-minute (RPM) within a torque range of 30 inch-lbs to 45 inch-lbs and exhibit a drop in the output rotational speed that is less than or equal to approximately 11.5% as the torque increases from 30 inch-lbs to 45 inch-lbs.
Claims20
A power tool comprising:
- a housing including an elongated body forming a motor case and a handle portion disposed rearward of the motor case;
- a battery receiver configured to receive a removable battery pack disposed rearward of the handle portion;
- an electric motor housed within the motor case, the electronic motor including a stator and a rotor rotatably disposed relative to the stator to drive a rotor shaft, wherein the electric motor includes an outer diameter of smaller than or equal to 66 mm, and configured to produce a maximum power output of greater than or equal to 2400 watts;
- a gear case mounted forward of the motor case and including an output spindle rotatably driven by the electric motor;
- and
- a controller configured to control a supply of electric power from the battery pack to the electric motor,
- wherein, the motor and the controller are configured to drive the output spindle so as to maintain an output rotational speed of greater than 3,500 rotations-per-minute (RPM) within a torque range of 30 inch-lbs to 45 inch-lbs and exhibit a drop in the output rotational speed that is less than or equal to approximately 11.5% as the torque increases from 30 inch-lbs to 45 inch-lbs.
A power tool comprising:
- a housing including an elongated body forming a motor case and a handle portion disposed rearward of the motor case;
- a battery receiver configured to receive a removable battery pack disposed rearward of the handle portion;
- an electric motor housed within the motor case, the electronic motor including a stator and a rotor rotatably disposed relative to the stator to drive a rotor shaft, wherein the electric motor includes an outer diameter of smaller than or equal to 66 mm;
- a gear case mounted forward of the motor case and including an output spindle rotatably driven by the electric motor;
- and
- a controller configured to control a supply of electric power from the battery pack to the electric motor,
- wherein, the motor and the controller are configured to drive the output spindle so as to achieve a maximum torque of greater than or equal to approximately 80 inch-lbs, and to maintain an output rotational speed of greater than 3,500 rotations-per-minute (RPM) and a variation in the output rotational speed that is less than or equal to approximately 11.5% within a torque range of 30 inch-lbs to 45 inch-lbs.
Dependencies are inferred from the claim text.