US Patent 7988161 Piano dolly

A dolly on which a grand piano can be mounted to facilitate movement thereof over a surface from one location to another, which includes a central hub shaped in the form of a miniature grand piano, two fixed length arms of equal length pivotally connected to the front of the hub at opposite corners thereof, and a fixed length rear arm having a longitudinal slot which is pivotally connected to the rear of the hub at selectively adjustable positions along the length of the slot to accommodate grand pianos having a range of different lengths.