A concentrator nozzle attachment for a blower device is disclosed that increases the airflow velocity of the blower without sacrificing the field of the jetting air. The concentrator nozzle is formed of an outer ring with a centrally located guide surface and is placed at the exit of an air tube. As the air exits the air tube, it's forced to flow around the guide surface, thus increasing its velocity. The attachment is secured to the end of the air tube and so does not alter the outer diameter through which the air exits. In this way, air velocity is increased without reducing its effectiveness.

A vacuum cleaner includes a hand-held device and the hand-held device has a housing defining an air inlet and an air blowing port at a front end thereof, the air blowing port being disposed adjacent to the air inlet; a dust cup disposed in the housing and connected to the air inlet; and an electric motor defining a motor chamber in communication with the dust cup, in which an airflow entering through the air inlet flows out of the air blowing port after flowing through the dust cup and the electric motor.

A vacuum cleaner includes a hand-held device and the hand-held device has a housing defining an air inlet and an air blowing port at a front end thereof, the air blowing port being disposed adjacent to the air inlet; a dust cup disposed in the housing and connected to the air inlet; and an electric motor defining a motor chamber in communication with the dust cup, in which an airflow entering through the air inlet flows out of the air blowing port after flowing through the dust cup and the electric motor.

An assembly includes a sensor arm extensible from a pillar of a vehicle, a sensor and a sensor window each attached to the sensor arm, a blower positioned between the sensor window and the pillar, and a duct extending from the blower to direct airflow from the blower across the sensor window.

An assembly includes a sensor arm extensible from a pillar of a vehicle, a sensor and a sensor window each attached to the sensor arm, a blower positioned between the sensor window and the pillar, and a duct extending from the blower to direct airflow from the blower across the sensor window.

A self-propelled cleaning device has a housing, a fan and a surface cleaning system for cleaning a surface to be cleaned. In order to also be able to clean an above-floor surface, in particular a plateau of a baseboard, the cleaning device also has an above-floor cleaning system for cleaning an above-floor surface vertically offset relative to the surface to be cleaned. The above-floor cleaning system has a flow connection to a suction and/or blower unit having a fan, the flow opening of which has a difference in height of roughly 3 cm or more relative to a standing surface of the cleaning device by comparison to a usual orientation of the cleaning device for a cleaning operation.

A self-propelled cleaning device has a housing, a fan and a surface cleaning system for cleaning a surface to be cleaned. In order to also be able to clean an above-floor surface, in particular a plateau of a baseboard, the cleaning device also has an above-floor cleaning system for cleaning an above-floor surface vertically offset relative to the surface to be cleaned. The above-floor cleaning system has a flow connection to a suction and/or blower unit having a fan, the flow opening of which has a difference in height of roughly 3 cm or more relative to a standing surface of the cleaning device by comparison to a usual orientation of the cleaning device for a cleaning operation.

An automatic filter cleaning system, e.g., for cleaning a filter in a vacuum cleaner. The cleaning system has an electrical motor that drives/rotates, directly/indirectly, a piston which directly/indirectly opens a filter cleaning valve. The filter cleaning valve may open for a filter cleaning back flow air stream that thus cleans the filter. The piston is spring loaded and a piston guide ensures that the energy accumulated in the spring and piston is released during the rotation of the piston, thereby shortly opening the filter cleaning valve.

A blower deck, a retrofit blower deck kit, and a vehicle incorporating the blower deck or the retrofit blower deck kit. The vehicle is a landscaping vehicle such as a tractor or a mower. The blower deck may be engaged with the vehicle frame and in a position under the body of the vehicle. The blower deck may be engaged with the vehicle frame in place of a mower deck. In other instances the blower deck may be attached to a portion of the frame so that the blower deck is located in front of the vehicle body. The retrofit blower deck kit may be utilized to convert the vehicle's mower deck to a blower deck. The retrofit kit includes a base plate that is engaged below a bottom edge of the mower deck's side wall and one or more adapters that convert the mower's cutter blade(s) to blower blade(s).

A blower deck, a retrofit blower deck kit, and a vehicle incorporating the blower deck or the retrofit blower deck kit. The vehicle is a landscaping vehicle such as a tractor or a mower. The blower deck may be engaged with the vehicle frame and in a position under the body of the vehicle. The blower deck may be engaged with the vehicle frame in place of a mower deck. In other instances the blower deck may be attached to a portion of the frame so that the blower deck is located in front of the vehicle body. The retrofit blower deck kit may be utilized to convert the vehicle's mower deck to a blower deck. The retrofit kit includes a base plate that is engaged below a bottom edge of the mower deck's side wall and one or more adapters that convert the mower's cutter blade(s) to blower blade(s).