A pull-behind grass rake connects to a riding lawnmower and uses a rotating brush to sweep grass clippings into an attached hopper. The rotating wheels of the unit power the brush as it moves across the ground. Manufacturers also refer to the units as lawn sweepers.
Pull-behind grass rakes use a set of gears that connect the brush and wheels of the unit, eliminating the need for an additional engine to power the rake. Lawn sweepers are also available in push versions that do not require a riding mower. The units work best on freshly mowed grass that is all the same length, and with the pull-behind version, it is possible to accomplish mowing and sweeping with a single pass of the lawn tractor. The spinning stiff brush combs through the grass to remove debris and uses a flipping action to transfer them to the hopper. Once the hopper is full, the user empties it manually.
These rakes are useful for operations other than removing grass clippings. When trees shed their leaves, the rake can sweep them into the container for easy disposal. The brushes also work to sweep a paved driveway or sidewalk, providing a quick way to remove up to 1/2 inch of snow from paved surfaces.