US Patent 9179643 Self-cleaning litter box

A self-cleaning litter box. The self-cleaning litter box includes a rake drive housing that is securable to and removable from a litter tray. The rake drive housing contains the rake drive control system. The rake drive control system automatically cleans the litter tray after each use and/or on a periodic basis by combing the litter with a sweeping rake. The sweeping rake is paired with a spade that loosens waste products that is stuck to the litter tray. At the disposal end of the self-cleaning litter box, a disposal rake cooperatively rotates with the sweeping rake to transfer waste products into a waste receptacle.