A nozzle assembly for use with a vacuum source includes a base member, a top cover member, a diaphragm, a valve flap and a plurality of springs. The base member has a suction opening extending therethrough. The top cover member enclosing an interior of the nozzle assembly. The diaphragm is rotationally coupled to the base member and includes an opening extending therethrough. The valve flap is rotationally coupled to the diaphragm and covers the opening in the diaphragm. One or more diaphragm springs are positioned between the base member and the diaphragm. One or more valve springs are positioned between the base member and the valve flap. An internal cavity is defined below the diaphragm and above the base member. In operation, pressure forces inside the internal cavity compete with forces associated with atmospheric pressure acting on the valve flap and diaphragm and the force of the diaphragm and valve springs to continuously open and close the valve flap in rapid succession during operation of the vacuum device.

A detachable 90 degree pivoting elbow forming an air channel that connects to a cleaning element permitting a swivel connection in orthogonal directions to provide a connection to the free end of an elongate wand of a vacuum cleaning system.

A vacuum cleaner nozzle (N) for cleaning a surface. The nozzle (N) has a first brush (FB) along a first side of the vacuum cleaner nozzle (N), the first brush (FB) having a first brush holder (FBH), and a second brush (SB) along a second side of the vacuum cleaner nozzle (N), the second brush (SB) having a second brush holder (SBH). The second side of the vacuum cleaner nozzle (N) is adjacent to the first side of the vacuum cleaner nozzle (N). According to one aspect of the invention, the second brush holder (SBH) is at a larger distance from the surface than the first brush holder (FBH). Preferably, the second brush (SB) is at an angle of less than 30 with regard to a vertical. The invention also provides a vacuum cleaner having such a vacuum cleaner nozzle (N).

A vacuum cleaner attachment is disclosed having a concave vacuum head with a swivel joint that permits swiveling of the vacuum head only within the plane of the vacuum head. The concave vacuum head can have a curvature that is similar to the curvature of a cylindrical surface to be vacuumed. Thus, while a user manipulates the conduit providing the air suction to the vacuum head, the concave surface can be supported and swiveled around the circumference of the cylindrical surface to be vacuumed, while the vacuum head is also moved along the length of the cylindrical surface. Throughout this movement of the concave vacuum head, the concave opening of the concave vacuum head can stay in closer proximity and conformity to the cylindrical surface than is possible using a fixed vacuum head with a flat opening, thereby making cleaning of the cylindrical surface more effective and efficient.

A cleaning robot includes a main body, a traveling part provided at a lower portion of the main body to enable the main body to move along a floor surface, a suction part provided at the main body to suck foreign materials from the floor surface, a cover provided on an exterior of the main body, and a recessed part recessed at a predetermined position of the cover, wherein the cover includes a first cover positioned above the recessed part, and a second cover which is positioned below the recessed part and has a greater width than the first cover.

A cleaning robot includes a top cover, a bottom cover provided below the top cover, traveling parts provided in the bottom cover, a suction module provided in the bottom cover to suck in foreign materials on the ground, a recessed part firmed to be recessed inward between the top cover and the bottom cover, and a first sensor located in the recessed part.

A main unit and a hose of a cleaner may be connected via a connecting portion constituted by a ball joint. The hose may be wound around a hose holding portion and stored at a front end storage so that it can be held to the main unit in a compact manner.

A cleaning robot includes a top cover, a bottom cover provided below the top cover, traveling parts provided in the bottom cover, a suction module provided in the bottom cover to suck in foreign materials on the ground, a recessed part formed to be recessed inward between the top cover and the bottom cover, and a first sensor located in the recessed part.

A vacuum cleaner attachment is disclosed having a concave vacuum head with a swivel joint that permits swiveling of the vacuum head only within the plane of the vacuum head. The concave vacuum head can have a curvature that is similar to the curvature of a cylindrical surface to be vacuumed. Thus, while a user manipulates the conduit providing the air suction to the vacuum head, the concave surface can be supported and swiveled around the circumference of the cylindrical surface to be vacuumed, while the vacuum head is also moved along the length of the cylindrical surface. Throughout this movement of the concave vacuum head, the concave opening of the concave vacuum head can stay in closer proximity and conformity to the cylindrical surface than is possible using a fixed vacuum head with a flat opening, thereby making cleaning of the cylindrical surface more effective and efficient.

A detachable 90 degree pivoting elbow forming an air channel that connects to a cleaning element permitting a swivel connection in orthogonal directions to provide a connection to the free end of an elongate wand of a vacuum cleaning system.