A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a flexible pad, a reinforcement layer or ring, and multiple floor-contacting tools such as abrasive disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape. A further aspect includes an inner ring edge having radially extending slots between pairs of radially enlarged tool mounting peaks. Still another aspect includes an insulator or spacer between a head of an abrasive tool and a reinforcement ring.

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension (x) greater than a linear dimension (y) of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle () offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension (x) greater than a linear dimension (y) of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle () offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

A robotic cleaning device, along with associated systems and methods of using the same, is described. The device may include a body portion that may define a top surface, a bottom surface, and a continuous sidewall surface. An example device may further include a drive system that propels the robotic device. An example device may further include two or more bottom brushes. An example device may further include a continuous opening that extends around the sidewall surface. An example device may further include a pair of sidewall brushes that may oscillate along the opening.

A robotic cleaning device, along with associated systems and methods of using the same, is described. The device may include a body portion that may define a top surface, a bottom surface, and a continuous sidewall surface. An example device may further include a drive system that propels the robotic device. An example device may further include two or more bottom brushes. An example device may further include a continuous opening that extends around the sidewall surface. An example device may further include a pair of sidewall brushes that may oscillate along the opening.

A robotic cleaning device, along with associated systems and methods of using the same, is described. The device may include a body portion that may define a top surface, a bottom surface, and a continuous sidewall surface. An example device may further include a drive system that propels the robotic device. An example device may further include two or more bottom brushes. An example device may further include a continuous opening that extends around the sidewall surface. An example device may further include a pair of sidewall brushes that may oscillate along the opening.

A robotic cleaning device, along with associated systems and methods of using the same, is described. The device may include a body portion that may define a top surface, a bottom surface, and a continuous sidewall surface. An example device may further include a drive system that propels the robotic device. An example device may further include two or more bottom brushes. An example device may further include a continuous opening that extends around the sidewall surface. An example device may further include a pair of sidewall brushes that may oscillate along the opening.

A floor polishing or grinding pad assembly is provided. In one aspects a polishing or grinding pad assembly employs a flexible pad, a reinforcement layer or ring, and multiple floor-contacting tools such as disks. In yet another aspect, at least one of the floor-contacting tools has a workpiece-contacting bottom plane having angle offset from that of a base surface of the tool, a flexible pad and/or a flexible reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks.

An apparatus is provided having a scrubbing disc that includes sacrificial electrodes of an electrolysis cell.

An apparatus is provided having a scrubbing disc that includes sacrificial electrodes of an electrolysis cell.