Patent ID: 11890726
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 15:
16. A power tool comprising:
a housing;
a motor positioned within the housing; and
an impulse assembly coupled to the motor to receive torque therefrom, the impulse assembly including
a cylinder at least partially forming a first chamber containing a hydraulic fluid and a second, expansion chamber in fluid communication with the first chamber to receive hydraulic fluid therefrom,
an anvil positioned at least partially within the first chamber,
a hammer positioned at least partially within the first chamber and engageable with the anvil for transferring rotational impacts to the anvil,
a biasing member biasing the hammer towards the anvil, and
a plug positioned within the expansion chamber;

wherein the plug is movable relative to the cylinder to vary a volume of the expansion chamber.