Abstract: A hand-held vacuum cleaner (100) is provides, including a housing (1) and a floor brush (200), the housing (1) is provided with an air inlet (111) and an air blowing vent (121), the air blowing vent (121) is disposed adjacent to the air inlet (111); the floor brush (200) is provided with a floor brush inlet (201), a floor brush outlet (203) and a floor brush opening (202), the floor brush inlet (201) is in communication with the air blowing vent (121), the floor brush outlet (203) is in communication with the air inlet (111), the floor brush opening (202) is located at a side of the floor brush (200) away from the housing (1), and an airflow blowing from the air blowing vent (121) first flows to the floor brush opening (202) through the floor brush inlet (201), and then flows to the air inlet (111) through the floor brush outlet (203).

Abstract: A floor-type vacuum cleaner includes a housing and rollers attached to the housing that are configured to provide movement of the housing. Each roller is disposed on a roller axle so as to be rotatable. At least one of the rollers includes a rigid hub and an air-filled, rubber, resilient, damping tire. Alternatively, at least one of the rollers has a damping property and includes alternating concentric layers of rigid and flexible components, with air being disposed between at least one of the rigid components and at least one of the flexible components.

Abstract: A self-propulsion hovering vacuum cleaner for domestic or industrial application has air outlets predisposed symmetrically along the longitudinal axis of the underside of the casing for directing more air to the front and back directions of the vacuum cleaner to achieve even distribution of air underneath the vacuum cleaner, thereby reducing juddering or rocking effects. The underside of the casing has a curved surface predisposed symmetrically along the longitudinal axis of the underside of the casing for better retention of air to enhance the hovering effect. In another embodiment of the present invention, air distribution channels are predisposed symmetrically on both sides of the underside of the casing along the longitudinal axis. The air distribution channels are in communication with the air outlets for directing more air to the front and back of the vacuum cleaner. The improved hovering vacuum machine also has self-propulsion features and self-cooling features.

Abstract: An electric vacuum cleaner of the present invention includes: a base plate connected to the lower face of a cleaner body so that the base plate is freely movable up and down, and having an exhaust hole formed in a surface facing the surface to be cleaned for blowing exhaust air; an extensible air duct, interposed between the base plate and the cleaner body, for guiding the exhaust air from an intake fan to the base plate; a dust suction nozzle supported on a part of the base plate and connected to the suction side of the intake fan; and wheels, mounted on the lower face of the cleaner body, for supporting the cleaner body on the surface to be cleaned when the base plate is moved up.

Abstract: Disclosed are improved vacuum cleaning apparatus that utilize toroidal vortex air flow in order to establish a pressure differential capable of attracting debris. These systems differ significantly from prior vacuum cleaners in that they are essentially closed systems; there is no constant intake and exhaust of fluid. Disclosed herein are toroidal vortex vacuum cleaner nozzles that function with a fluid delivery system, which, in combination, yield a toroidal vortex that is split between the extreme ends of the nozzle. Also disclosed is a complete toroidal vortex vacuum system employing a centrifugal dirt separator. The present invention excels in being more efficient, lighter weight and quieter than the prior art.

Abstract: A suction nozzle for a vacuum cleaner is designed so that exhaust from a motor blower in the body of the vacuum cleaner is provided into a suction port of the suction nozzle. The exhaust provided into the suction nozzle is prevented from being discharged to the atmosphere at the point where the suction nozzle meets the to-be-cleaned surface.

Abstract: A hover vacuum cleaner has a casing, an underside to the casing, an impeller and drive motor for the impeller, a dust filter, an inlet for dust laden air, an exhaust port in the, a pathway for air to pass from the inlet, through the dust filter and impeller and around the motor, and through the exhaust port. The underside has dished air chambers, covering a substantial area of the underside. Preferably, the underside has at least two dished air chambers, each of which straddles the longitudinal axis of the underside. Adjacent dished air chambers are separated by a dam which is transverse to the longitudinal axis. The exhaust port is in direct fluid communication with one of the dished air chambers and the exhaust port also straddles the longitudinal axis. The underside has a peripheral groove which is in fluid communication with the exhaust port and/or the adjacent air chamber.