Concentrator attachment for blower air tube
AssigneeBlack & Decker Inc.
InventorsNathan Greene, Khoa Nguyen
Life of this patent
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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.
Claims12
A blower device comprising:
- a housing;
- an air tube connected to a front portion of the housing;
- wherein the housing encloses a motor and a fan, and the motor is operatively connected to the fan so that in operation the fan pushes air through the air tube out a distal end of the air tube;
- and
- a concentrator attached to the distal end of the air tube, the concentrator having a tear-drop shaped air guide surface located in the airflow path.
A concentrator attachment for a blower device comprising:
- an outer ring and a tear-drop shaped air guide surface, the outer ring capable of attaching to an air tube of a blower;
- the guide surface being at least partially positioned in the air tube when attached to the air tube;
- and
- wherein the guide surface has a first end having a rounded circular shape with a first diameter, tapering to a second end with a smaller second diameter.
Dependencies are inferred from the claim text.