Abstract: A self-propelled cleaning apparatus for cleaning a pool includes a housing cover removably fastened to a base to define an interior chamber and rotational supports coupled to the apparatus for moving it over submerged pool surfaces. A water discharge assembly with a water outlet for recirculating filtered water into the pool is coupled to the interior surface of the housing cover. A filter assembly for filtering water and debris flowing from the pool through a water inlet in the base is supported within the interior chamber above the base. A mounting bracket coupled to the water discharge assembly is configured to fixedly position and independently suspend the filter assembly within the interior chamber below the interior surface of the housing cover and above the interior surface of the base.

Abstract: The base plate of a robotic or manually propelled tank or pool cleaning apparatus includes a transverse conduit positioned on the interior surface of the base plate and is in fluid communication with a source of pressurized water that is also located within the pool cleaner's housing, which pressurized water is discharged from the bottom or lower portion of the transverse conduit through a plurality of openings that extend along a line that is transverse to the longitudinal axis of the pool cleaner's direction of travel, to produce downwardly-directed water jets that are discharged through and below the base plate towards the surface of the pool or tank over which the pool cleaning apparatus is moving to dislodge and suspend dirt and debris that is then drawn into and retained by the pool cleaner's filter.

Abstract: A base plate for a self-propelled robotic cleaning apparatus for cleaning a submerged surface of a pool or tank. The base plate includes a bottom surface and a water inlet formed therethrough, and an inlet extension member configured to mount in the water inlet. The inlet extension member is slidably retractable and extendable in a direction that is normal relative to the bottom surface of the base plate. A height adjustment mechanism is coupled to the inlet extension member and configured to move the inlet extension member upwardly and downwardly in the normal direction relative to the bottom surface of the base plate. The height adjustment mechanism can be adjusted manually. Alternatively, at least one sensor is operably coupled to a controller to automatically control the height adjustment mechanism.