Patent ID: 9220389
Filing Date: 2015-12-29
Classification: A47L,A61F,B32B

Abstract:
1. A cleaning pad for a mobile robot, comprising: absorbent layers that are stacked and bonded together, the absorbent layers each comprising one or more airlaid layers for absorbing liquid through capillary action and for distributing the liquid within a core of the cleaning pad; a wrap layer around the absorbent layers, the wrap layer being adhered to at least some of the absorbent layers to hold the absorbent layers, the wrap layer comprising a fiber-entangled layer that is flexible and absorbent, the fiber-entangled layer having holes therein for absorption of liquid through capillary action, the wrap layer further comprising an abrasive layer on a bottom surface of the fiber-entangled layer that faces away from the mobile robot when the cleaning pad is attached to the mobile robot, the abrasive layer comprising fibers that cover at least part of the bottom surface of the fiber-entangled layer and that produce an abrasive surface that is rougher than a surface of the fiber-entangled layer; and a backing layer adhered to a top surface of the fiber-entangled layer that faces toward the mobile robot when the cleaning pad is attached to the mobile robot, the backing layer comprising protruding edges that extend beyond longitudinal edges of the wrap layer around the absorbent layers, the protruding edges having cutouts centered along the protruding edges to engage corresponding features of a pad holder on the mobile robot and thereby attach the backing layer, and thus the cleaning pad, to the pad holder.