Percussion tool
AssigneeMilwaukee Electric Tool Corporation
InventorsMatthew S. Zawisza, Andrew D. Van Hoorn, Ethan T. Zimany
Life of this patent
Estimating the term…
Abstract
A percussion tool comprises a housing and an electric motor positioned within the housing. The motor has a nominal outer diameter of up to about 80 mm and is operable to output at least about 2760 W. The percussion tool further comprises a battery pack supported by the housing for providing power to the motor. The battery pack includes a plurality of battery cells having a nominal voltage of up to 80 Volts and a sustained operating discharge current of between about 40 A and about 60 A. The percussion tool further comprises a percussion mechanism driven by the motor and including a striker supported for reciprocation in the housing. The percussion tool has a ratio of impact energy to mass that is greater than or equal to 2.5 Joules/kilogram.
Claims24
A percussion tool comprising:
- a housing;
- an electric motor positioned within the housing, the motor having a nominal outer diameter of up to about 80 mm, the motor being operable to output at least about 2760 W;
- a battery pack supported by the housing for providing power to the motor, the battery pack including a plurality of battery cells having a nominal voltage of up to 80 Volts and a sustained operating discharge current of between about 40 A and about 60 A;
- and
- a percussion mechanism driven by the motor and including a striker supported for reciprocation in the housing,
- wherein the percussion tool has a ratio of impact energy to mass that is greater than or equal to 2.5 Joules/kilogram.
A percussion tool comprising:
- a housing;
- an electric motor positioned within the housing, the motor having a nominal outer diameter of up to about 80 mm, the motor being operable to output at least about 2760 W;
- a battery pack supported by the housing for providing power to the motor, the battery pack including a plurality of battery cells having a nominal voltage of up to 80 Volts and a sustained operating discharge current of between about 40 A and about 60 A;
- and
- a percussion mechanism driven by the motor and including a striker supported for reciprocation in the housing,
- wherein the percussion tool has a ratio of blow power to mass that is greater than or equal to 50 W/kg.
A percussion tool comprising:
- a housing;
- an electric motor positioned within the housing, the motor having a nominal outer diameter of up to about 80 mm, the motor being operable to output at least about 2760 W;
- a battery pack supported by the housing for providing power to the motor, the battery pack including a plurality of battery cells having a nominal voltage of up to 80 Volts and a sustained operating discharge current of between about 40 A and about 60 A;
- and
- a percussion mechanism driven by the motor and including a striker supported for reciprocation in the housing;
- wherein the percussion tool delivers greater than or equal to 85 kJ of impact energy per minute.
Dependencies are inferred from the claim text.