Electric rotary trowel

A rotary trowel for smoothing and finishing a concrete surface, comprising,

• a generally horizontal, imperforate circular shroud having down turned peripheral edge portions and a central opening therein,
• an electric motor assembly mounted on said shroud and including a DC electric motor having a vertically disposed output shaft, a speed reduction device drivingly connected to the electric motor output shaft and having an output shaft disposed in axial alignment with the electric motor output shaft,
• an elongate handle having one end thereof connected with said electric motor assembly and extending angularly therefrom,
• a rotary trowel blade assembly positioned below said shroud and having a hub member connected to the output shaft of the speed reduction device, said rotary trowel blade assembly including a plurality of trowel blade members each comprising a substantially flat trowel blade element having an upturned leading edge and a trailing edge,
• connecting means projecting into and adjustably connecting each of said blade members to said hub member to permit tilting of said blade members about their respective longitudinal axes, said connecting means for each blade member being spaced from the connecting means for the other blade members,
• shifting means extending into said hub member and engaging said connecting means for shifting said connecting means to cause movement of said blade members between tilted and non-tilted positions,
• an actuating means engaging said shifting means for shifting and retaining said blade members in a tilted position.