Riding trowel having rotors configured for reverse rotation

A self propelled power trowel, for finishing a concrete surface, which comprises:

• rigid frame means adapted to be disposed over said concrete surface;
• a pair of rotor assemblies each having rotor blades for frictionally contacting said concrete surface and supporting said rigid frame means thereabove;
• a prime mover mounted to the rigid frame means and operatively coupled to the rotor assemblies;
• means for rotating the rotor blades in opposite directions;
• means for moving the trowel in forward and reverse directions;
• a rear facing video camera;
• and
• a user input display that displays a video signal from the rear facing camera responsive to moving the trowel in the reverse direction.

A self propelled power trowel, for finishing a concrete surface, which comprises:

• rigid frame means adapted to be disposed over said concrete surface;
• a power source for providing power to said power trowel and attached to the rigid frame means;
• a pair of rotor assemblies for frictionally contacting said concrete surface and supporting said rigid frame means thereabove;
• motor means operatively connected to the power source for driving the rotor assemblies;
• and
• an energy storage means coupled to or in communication with said motor means and configured to discharge energy to assist said motor means in driving a required load.