US Patent 7617659 Waste disposal device including a cartridge movable by rollers

A waste disposal device including a cartridge movable by rollers. The waste disposal device comprises a rotation mechanism for rotating the rotatable cartridge. The cylindrically shaped waste disposal device has an inner wall. The rotatable cartridge comprises a cylindrical shape having an outside wall. The rotation mechanism comprising at least two opposingly aligned movable rollers extends between said inner wall of said waste disposal device and said outer wall of said rotatable cartridge. The rollers are engagingly configured to cause the cartridge to rotate upon activation of the rotation mechanism.