A brush suitable for performing at least one of a cleaning, buffing, and polishing action on a surface without requiring water comprises a core member, the core member having a central axis surrounded by a plurality of C-channel grooves and a plurality of sheets of material, each sheet of material comprised of closed-cell silicone foam rubber, being folded to define a double-sided flap, and secured to a respective one of the plurality of C-channel grooves. The sheet of material is secured to the core member to permit relative movement of the double-sided flap with respect to the surface in at least a first direction, and the relative movement of the double-sided flap produces at least one of the cleaning, buffing and/or polishing action on the surface without requiring water.

A brush suitable for performing at least one of a cleaning, buffing, and polishing action on a surface without requiring water comprises a core member, the core member having a central axis surrounded by a plurality of C-channel grooves and a plurality of sheets of material, each sheet of material comprised of closed-cell silicone foam rubber, being folded to define a double-sided flap, and secured to a respective one of the plurality of C-channel grooves. The sheet of material is secured to the core member to permit relative movement of the double-sided flap with respect to the surface in at least a first direction, and the relative movement of the double-sided flap produces at least one of the cleaning, buffing and/or polishing action on the surface without requiring water.

This application relates to flotation devices generally, and particularly to inflatable flotation devices configured for use by an infant to support the infant at least partially above the water and to at least partially retain the infant therein. In some embodiments, an apparatus is a flotation member having an inner perimeter, a top portion and a bottom portion. The flotation member has a first height between its bottom portion and its top portion at a first location of the flotation member. The flotation member has a second height between the top portion and the bottom portion at a second location of the flotation member, the second height different from the first height. The flotation member includes a support member at least partially disposed within the inner perimeter of the flotation member. The support member has a first portion coupled to the top portion of the flotation member at the first location. The support member has a second portion coupled to the top portion of the flotation member at the second location. The support member has a third portion between the first portion and the second portion, and the third portion is coupled to the bottom portion of the flotation member at a third location different from the first location of the flotation member and the second location of the flotation member.

This application relates to flotation devices generally, and particularly to inflatable flotation devices configured for use by an infant to support the infant at least partially above the water and to at least partially retain the infant therein. In some embodiments, an apparatus is a flotation member having an inner perimeter, a top portion and a bottom portion. The flotation member has a first height between its bottom portion and its top portion at a first location of the flotation member. The flotation member has a second height between the top portion and the bottom portion at a second location of the flotation member, the second height different from the first height. The flotation member includes a support member at least partially disposed within the inner perimeter of the flotation member. The support member has a first portion coupled to the top portion of the flotation member at the first location. The support member has a second portion coupled to the top portion of the flotation member at the second location. The support member has a third portion between the first portion and the second portion, and the third portion is coupled to the bottom portion of the flotation member at a third location different from the first location of the flotation member and the second location of the flotation member.

A method of planning a cleaning route for a cleaning robot: firstly, starting from an original point based on maps of grids, cleaning grid zones formed by the grids one by one until an entire region is cleaned, and then establishing a map of the entire region; secondly, searching the map of the entire region to find out uncleaned areas missed from cleaning, and then cleaning the uncleaned areas; thirdly, cleaning peripheral areas of the entire region based on the map of the entire region; and lastly, returning to the original point. A chip is also provided which stores procedures for controlling the cleaning robot to implement the method of planning a cleaning route.

A method of planning a cleaning route for a cleaning robot: firstly, starting from an original point based on maps of grids, cleaning grid zones formed by the grids one by one until an entire region is cleaned, and then establishing a map of the entire region; secondly, searching the map of the entire region to find out uncleaned areas missed from cleaning, and then cleaning the uncleaned areas; thirdly, cleaning peripheral areas of the entire region based on the map of the entire region; and lastly, returning to the original point. A chip is also provided which stores procedures for controlling the cleaning robot to implement the method of planning a cleaning route.

A method and device for cleaning and pretreating solar panels is provided. The device comprises a brush having cleaning elements made from silicone foam rubber material. The cleaning elements can be flaps of silicone foam rubber material. A sheet of silicone foam rubber material having two free ends can be attached to a core member such that the two free ends extend away from the core member to form flaps. The solar panels can be cleaned by brushing the solar panel surfaces with the flaps of silicone foam rubber material. The solar panels can also be pretreated by brushing the solar panel surfaces with silicone foam rubber material.

A method and device for cleaning and pretreating solar panels is provided. The device comprises a brush having cleaning elements made from silicone foam rubber material. The cleaning elements can be flaps of silicone foam rubber material. A sheet of silicone foam rubber material having two free ends can be attached to a core member such that the two free ends extend away from the core member to form flaps. The solar panels can be cleaned by brushing the solar panel surfaces with the flaps of silicone foam rubber material. The solar panels can also be pretreated by brushing the solar panel surfaces with silicone foam rubber material.

A brush configured to clean, buff, and polish a surface, comprising a core member having a central axis, a periphery and a sheet of material, the sheet of material comprising closed-cell silicone foam rubber and having a first free end portion. The sheet of material is attached to the core member with the free end portion extending away from the periphery substantially parallel to the central axis of the core member. The core member includes a flat surface adjacent the attachment of the sheet of material. The core member and the sheet of material are configured for relative movement with respect to the surface in at least a first direction. The motion in the first direction causes the free end portion of the sheet of material to contact the surface at a non-zero velocity, and produces at least one of the cleaning, buffing and/or polishing action on the surface.