Patent ID: 11927022
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A concrete trowel comprising:
a frame;
a drive assembly including a motor mounted on the frame and a drive hub configured to receive torque from the motor, wherein the drive hub includes a receiving portion having a detent groove and a plurality of locking elements receivable within the detent groove;
a rotor rotatable about a rotational axis and including a plurality of blades, wherein the rotor includes an attachment portion that is received within the receiving portion of the drive hub; and
a quick-change coupling for selectively attaching the rotor and the drive hub for co-rotation therewith, wherein the quick-change coupling includes a cam that is rotatable to displace the locking elements radially outward into the detent groove of the drive hub.