Concentrator attachment for blower air tube
AssigneeBlack & Decker Inc.
InventorsNathan Greene, Khoa Nguyen
Life of this patent
Estimating the term…
Abstract
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.
Claims10
A blower device comprising:
- a housing;
- an air tube connected to a front portion of the housing, the air tube having an opening at a distal end, wherein the housing encloses a motor and a fan, the motor is operatively connected to the fan, and in operation the fan creates an airflow through the air tube exiting the opening at the distal end of the air tube in an airflow path;
- and
- a concentrator including an outer ring removably attached to the opening at the distal end of the air tube, an air guide surface positioned centrally of the outer ring, and guide vanes connecting the outer ring to the air guide surface,
- wherein the air guide surface has an enclosed end, the enclosed end of the air guide surface being positioned centrally of the outer ring to block a center portion of the airflow from the air tube and cause the airflow from the air tube to be diverted around the enclosed end of the air guide surface and exit the opening at the distal end of the air tube through a space between the air guide surface and the outer ring of the concentrator.
A concentrator attachment for a blower device comprising:
- an outer ring to be attached to an opening end of an air tube of the blower device;
- an air guide surface positioned at a center of the outer ring;
- and
- guide vanes connecting the outer ring to the air guide surface,
- wherein the air guide surface includes an enclosed end, the enclosed end of the air guide surface being positioned at the center of the outer ring to block a center portion of an airflow from the air tube and cause the airflow from the air tube to be diverted around the enclosed end of the air guide surface and exit the opening end of the air tube through a space between the air guide surface and the outer ring of the concentrator attachment.
Dependencies are inferred from the claim text.