US Patent 10507469 Wood chipper

A wood chipper comprising a chamber in which wood is chipped, a discharge of chipped wood from the chamber, and a pair of rollers at least one of which is driven. The rollers are positioned for feeding of wood between the rollers and into the chamber. One of the rollers is a smooth roller, and an other of the rollers is driven and has cutting elements thereon. The at least one roller is driven by a hydrostatic pump. A plurality of legs are height adjustable for supporting the wood chipper and for positioning a power receiving means at different heights for aligning with connection to a tractor power take-off.