Rotary impulse tool

A power tool configured to deliver torque impulses to a tool bit, the power tool comprising:

• a housing;
• a motor supported within the housing;
• and
• an impulse assembly supported within the housing and configured to be driven by the motor, the impulse assembly including an anvil assembly and a hammer assembly configured to impart a torque impulse to the anvil assembly, the hammer assembly including a drum assembly defining an inner surface, and the anvil assembly including
• an anvil defining a slot and a longitudinal bore having a hexagonal region and a circular region disposed inwardly from the hexagonal region, the hexagonal region configured to receive the tool bit,
• a plug received into the longitudinal bore,
• a blade assembly including a blade at least partially received into the slot and a first spring biasing the blade toward the inner surface of the drum assembly, and
• an ejection mechanism configured to eject the tool bit from the anvil, the ejection mechanism including a second spring and a plunger each positioned in the circular region;
• wherein a diameter of the plunger is greater than a width of the hexagonal region.

A power tool configured to deliver torque impulses to a tool bit, the power tool comprising:

• a housing;
• a drive assembly including
• an electric motor supported within the housing, the electric motor having an outer rotor at least partially surrounding an inner stator, and
• an impulse assembly supported within the housing and configured to be driven by the electric motor to rotate about an axis,
• wherein the impulse assembly includes an anvil assembly and a hammer assembly configured to impart a torque impulse to the anvil assembly, the hammer assembly including a drum assembly defining an inner surface, and the anvil assembly including
• an anvil including an output end configured to removably support the tool bit, the anvil defining a longitudinal bore,
• a plug received into the longitudinal bore, and
• a blade assembly including a blade held by the anvil and a spring biasing the blade toward the inner surface of the drum assembly;
• wherein the power tool defines a length measured along the axis between an end of the anvil and an end of the housing;
• wherein the drive assembly is configured to impart a maximum torque to the tool bit;
• wherein the length is less than or equal to 115 millimeters;
• and
• wherein the maximum torque is greater than or equal to 650 inch pounds.