Abstract: An engine-driven trowel includes a handle, a set of blades rotated within a single plane, a blade pitch control unit having a swash plate, a swash plate actuator arm and a pivot pin for pivotally coupling the actuator arm to the trowel. A blade pitch adjustment mechanism includes a lever-actuated cam assembly which engages and deflects the outboard end of the swash plate actuator arm. Up and down movements of the lever rotate the cam and displace the swash plate actuator arm to change the pitch of the trowel blades.

Abstract: A power divider system with governed speed control wherein a first power path and a second power path are formed by a differential-like power divider. A control system associated with the two power paths senses and controls the speed relationship thereof. The speed of an output element of the second power path is determined and then governed to a predetermined value by modulated transfer of power from the second power path to the first power path. The speed of an output element of the first power path is limited relative to the output element of the second power path by the transfer of power from the first power path to the second power path through a one-way drive system. A power transfer mechanism for governing the second power path to the predetermined speed provides fail-safe operation.