Flotation machine having pan support structure configured for conforming the shape of a float pan

A machine for floating a concrete surface, comprising:

• a rigid frame adapted to be disposed over said concrete surface;
• means attached to the rigid frame for providing motive power to said machine;
• at least one rotatable rotor assembly attached to the rigid frame and configured for converting the motive power into rotational motion;
• a float pan support structure rotatably coupled by a hub to the at least one rotor assembly and configured for rotatable attachment to a float pan, said float pan having a conformable shape configured to frictionally contact said concrete surface and support said rigid frame thereabove, said support structure configured for conforming the shape of the float pan;
• a plurality of trusses, each truss extending radially from the hub and each truss having a float pan contact surface, wherein one or more of the trusses includes means for attachment to the float pan;
• and
• perimetric bracing linking two or more of the trusses;
• wherein the float pan contact surface of at least one truss is substantially fully flat and wherein a proximal end of the least one truss is recessed from the float pan contact surface in an axial direction.

A machine for floating a concrete surface, comprising:

• a rigid frame adapted to be disposed over said concrete surface;
• means attached to the rigid frame for providing motive power to said machine;
• at least one rotatable rotor assembly attached to the rigid frame and configured for converting the motive power into rotational motion;
• a float pan support structure rotatably coupled by a hub to the at least one rotor assembly and configured for rotatable attachment to a float pan, said float pan having a conformable shape configured to frictionally contact said concrete surface and support said rigid frame thereabove, said support structure configured for conforming the shape of the float pan;
• a plurality of trusses, each truss extending radially from the hub and each truss having a float pan contact surface, wherein one or more of the trusses includes means for attachment to the float pan;
• and
• perimetric bracing linking two or more of the trusses;
• wherein the hub comprises an inner wall having a slope is configured to receive a centering bracket mounted on the float pan, and while receiving the centering bracket, to urge the float pan into axial alignment with the support structure.