When the autumn leaves stop falling, they are either left where they are or disposed of. Keeping a lawn clean means raking, which is a problem for anyone who suffers from back pain or has difficulty bending over. One alternative is the lawn sweeper, a device that picks up leaves and other small debris on smooth flat lawns. There are four main types of lawn sweeper, these are hand powered, powered (by either gas or electricity), powered with a built in shredder, or towed. The type of leaf collector you choose will be determined by your own individual requirements.