Rotating concrete finishing trowel

A rotary concrete finishing trowel comprising,

• an operating head at one end of the apparatus having a blade shaft rotatable mounted thereon with at least one finishing blade connected thereto for rotation in a horizontal plane to finish a concrete floor surface,
• a drive motor at the other end of said apparatus,
• an elongated frame element connected at one end to the drive motor and at the other end to the operating head and
• a drive shaft extending between the motor and the operating head for imparting rotation to the shaft to rotate the finishing blade for smoothing the surface of a cement or concrete floor and
• the operating head includes a plurality of spaced apart cam members, a linkage assembly is connected to said cam members and a blade positioning plate is operatively associated with the cam members for movement upon the operating head to pivot each finishing blade about a horizontal radial axis.

A concrete floor finishing trowel apparatus with an operator supported motor comprising,

• an operating head having a transmission at an upper end thereof and a plurality of floor finishing trowel blades that extend radially from a vertical output shaft that is connected to the transmission for rotation thereon at a lower end thereof for finishing a concrete floor surface and for supporting the operating head without supporting the motor as the trowel blades are rotated thereby upon the floor surface,
• an elongated frame element connected at a first end to the operating head and extending laterally therefrom,
• an operator supported drive motor spaced laterally apart from the operating head and connected to an end of the frame element opposite said first end such that the weight of the drive motor is not applied to the rotating trowel blades during operation,
• a handle on the apparatus for enabling an operator to support the motor
• a drive shaft operatively connected between the drive motor and the transmission for imparting rotation to the finishing trowel blades for smoothing the concrete floor surface.