Patent ID: 11897095
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 15:
16. An impact power tool comprising:
a motor;
an output shaft to which a tool bit is attachable for performing work on a workpiece; and
an impact mechanism disposed between the motor and the output shaft for converting a continuous torque output from the motor to discrete rotational impacts upon the output shaft, the impact mechanism including
a cylinder assembly concentrically disposed about the output shaft,
a cavity defined within the cylinder assembly containing a hydraulic fluid, and
a collapsible bladder having a first closed end, a second closed end opposite the first closed end, and an interior volume defined between the first and second closed ends and filled with a gas, the bladder being maintained in a shape coinciding with that of the cavity by fitment within the cavity, with the first and second closed ends being disconnected from each other;

wherein each of the first and second closed ends is seamless.