Compact plastic Oldham coupler

An Oldham coupler assembly for transferring rotary power between two shafts, comprising:

• an input plate and an output plate made of a first material, the input plate having gear teeth about an outer circumference thereof and the output plate having a spline assembly retained therein and centered about an axis of rotation of the output plate, the spline assembly biased outwardly from an outer face of the output plate and being axially slidable;
• a drive plate made of a second material and positioned between and mechanically coupled to the input plate and the output plate, the drive plate having a pair of opposed open-ended slots having a first centerline passing through a center of the drive plate and an elongated close-ended center slot having a second centerline passing through the center of the drive plate positioned orthogonal to the first centerline;
• a first pair of wheels rotatably fastened to an inner face of the input plate;
• and,
• a second pair of wheels rotatably fastened to an inner face of the output plate, each wheel of the first pair of wheels rotatably engaging with a respective one of the pair of open-ended opposed slots and the second pair of wheels rotatably engaging with the center slot, the first and second pair of wheels being made of the second material and moveably coupling the drive plate to the input and output plates, respectively.