Variable width, twin engine riding trowel

A self-propelled, variable width motorized riding trowel for finishing a concrete surface, said riding trowel comprising:

• motor means for powering said riding trowel;
• seat means for supporting an operator of said riding trowel;
• control means accessible by said operator from said seat means for steering and controlling said riding trowel;
• frame means adapted to be disposed over said concrete surface for supporting said seat means, said control means and said motor means;
• two displaceable rotor means driven by said motor means and associated with said frame means for frictionally contacting said concrete surface and supporting said frame means thereabove, each rotor means establishing a generally vertical axis of rotation;
• and,
• means for enabling the distance between the axis of rotation of each rotor means to be expanded or contracted.

A self-propelled, dual motor, variable width riding trowel for finishing a concrete surface, said riding trowel comprising:

• a pair of displaceable motors for powering said trowel;
• frame means adapted to be disposed over said concrete surface for mounting said motors;
• displaceable rotor means associated with said frame means for frictionally contacting said concrete surface and supporting said frame means thereabove;
• drive means associated with each of said motors for revolving said rotor means in response to said motors, said drive means establishing spaced apart generally vertical axes of rotation for said rotor means;
• extensible means disposed beneath said frame means for tilting said rotor means in response to said control means for steering;
• extensible guard cage means for preventing inadvertent contact between said rotor means and foreign objects, said guard cage means mounted on said frame;
• and,
• displacement means for varying the distance between said axes of rotation.

A self-propelled, dual motor riding trowel for finishing a concrete surface, said riding trowel comprising:

• a rigid frame adapted to be disposed over said concrete surface;
• seat means on said frame for supporting an operator of said riding trowel;
• a pair of spaced apart, rotors projecting downwardly from said frame for frictionally contacting said concrete surface and supporting said frame thereabove, each rotor establishing a generally vertical axis of rotation;
• a motor associated with each of said rotors for powering said riding trowel;
• displaceable motor mount means for adjustably mounting each of said motors and their associated rotors to said frame, said displaceable motor mount means comprises a sliding subframe block for supporting the motor and rail means extending from the frame penetrating the block for slidably coupling said motor mount means to said frame;
• control means accessible by said operator from said seat means for steering and controlling said riding trowel;
• and,
• means for synchronizing said motors.

A self-propelled, dual motor riding trowel for finishing a concrete surface, said riding trowel comprising:

• a rigid frame adapted to be disposed over said concrete surface;
• seat means on said frame for supporting an operator of said riding trowel;
• a pair of spaced apart, rotors projecting downwardly from said frame for frictionally contacting said concrete surface and supporting said frame thereabove, each rotor establishing a generally vertical axis of rotation;
• a motor associated with each of said rotors for powering said riding trowel;
• control means accessible by said operator from said seat means for steering and controlling said riding trowel;
• and,
• means comprising a replaceable shaft for synchronizing said motors, said shaft having a length dependent upon the distance between the axes of rotation of said rotors.

A self-propelled, dual motor riding trowel for finishing a concrete surface, said riding trowel comprising:

• a rigid frame adapted to be disposed over said concrete surface;
• seat means on said frame for supporting an operator of said riding trowel;
• a pair of spaced apart, rotors projecting downwardly from said frame for frictionally contacting said concrete surface and supporting said frame thereabove, each rotor establishing a generally vertical axis of rotation;
• a motor associated with each of said rotors for powering said riding trowel;
• control means accessible by said operator from said seat means for steering and controlling said riding trowel;
• and,
• means comprising a shaft extending from an output of a first motor to an output of a second motor for synchronizing said motors.

A self-propelled dual motor riding trowel for finishing a concrete surface, said riding trowel comprising:

• a rigid frame adapted to be disposed over said concrete surface, said frame comprising a front, a rear, and a pair of spaced apart ends;
• seat means on said frame for supporting an operator of said riding trowel;
• a pair of spaced apart rotors projecting downwardly from said frame for frictionally contacting said concrete surface and supporting said frame thereabove, each rotor establishing a generally vertical axis of rotation and comprising a plurality of revolving blades that contact and finish concrete, the blades having a longitudinal axis about which they may be rotated to vary their pitch;
• a motor disposed upon said frame above each of said rotors for revolving the rotors to finish concrete and propel said riding trowel, each motor establishing a generally horizontal axis of rotation, each axis of motor rotation being substantially collinear with the other;
• shaft means for synchronizing said motors, said shaft means extending substantially horizontally between said rotors beneath said seat means and oriented substantially parallel to each axis of rotation;
• belt means interconnecting each motor with said shaft means, whereby to power said rotors;
• and,
• control means accessible by said operator from said seat means for activating the rotors and said blades to effectuate steering and control of said riding trowel.