Abstract: A controllable hydraulic power transfer system for coupling rotary energy produced at an auxiliary power take-off of a tractor type vehicle to a vehicle attachment or lug is presented herein. An exemplary adaptation of the power transfer system is presented where a riding lawn mower supports a vacuum lawn clipping collection assembly which includes a blower impeller powered by the hydraulic power transfer system.

Abstract: An apparatus for collecting lawn clippings produced by a tractor type lawn mower is presented herein where a vacuum producing blower and collection bin form an assembly that is rigidly mounted to the rear portion of a tractor and coupled to the housing for the lawn mowing blades by a flexible duct. Power is produced by a belt drive adapted to couple the blower to the grass cutter drive shaft.