Patent ID: 8919476

Claim:
A platform dolly system comprising: a first dolly device having a power unit, a frame, at least one knuckle suspension pivotally connected to the frame and fluidly connected to a first hydraulic pump and a second hydraulic pump of the power unit, and at least one wheel secured to the knuckle suspension; the knuckle suspension having a first leg and a second leg, the first leg is connected to the frame at one end and at the opposite end to one end of the second leg at a pivot point to raise and lower the frame of the first dolly device, wherein the opposite end of the second leg is connected to the wheel; a second dolly device having a power unit, a frame, a suspension secured to the frame of the second dolly, and a wheel rotatably secured to the suspension of the second dolly; and a control unit remote from the first and second dolly devices and in electronic communication with the power unit of the first dolly and the power unit of the second dolly to independently operate the first and second dolly devices to move a load; wherein, when the first dolly is operated by the power unit, the first and second hydraulic pumps are operable to steer the at least one wheel via rotation of the at least one knuckle suspension to move transverse, forward, and reverse.