Blower and rotary rake for debris herding
First Claim
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1. A lawn debris blower comprising:
- a chassis movable across the lawn;
a blower attached to the chassis, the blower producing a diverging flow of air; and
a tilted rotary rake attached to the chassis, the axis of the tilted rotary rake having a tilt from the normal direction to the lawn and from a horizontal plane, the diverging flow of air from the blower being generally tangent to the lowest portion of the circumference of the tilted rotary rake, allowing the tilted rotary rake and the diverging flow of air to impel lawn debris in combination.
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Abstract
A debris herding method and apparatus is described comprising a low power air blower and a tilted rotary rake. The air blower acts together with a tilted rotary rake to dislodge and impel the debris. A motor driven chassis transports the blower and the rotary rake across the lawn. The blower and rotary rake can be energetically powered, such as by a solar cell array mounted to the chassis. The present invention is directed to an energetically efficient device for moving debris on a surface, such as leaves on a lawn.
10 Citations
15 Claims
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1. A lawn debris blower comprising:
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a chassis movable across the lawn; a blower attached to the chassis, the blower producing a diverging flow of air; and a tilted rotary rake attached to the chassis, the axis of the tilted rotary rake having a tilt from the normal direction to the lawn and from a horizontal plane, the diverging flow of air from the blower being generally tangent to the lowest portion of the circumference of the tilted rotary rake, allowing the tilted rotary rake and the diverging flow of air to impel lawn debris in combination. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of impelling debris across a lawn, comprising:
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blowing a diverging stream of air across a portion of the lawn; rotating a tilted rotary rake having an axis of rotation and a plurality of tines extending radially around the axis of rotation, wherein the axis of rotation is tilted from the normal direction to the lawn and from a horizontal plane; and mechanically agitating the portion of the lawn with the tines of the rotating tilted rotary rake, allowing the diverging stream of air and the tines of a rotating tilted rotary rake to impel lawn debris in combination. - View Dependent Claims (8, 9, 10)
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11. A lawn debris blower comprising:
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a chassis that is configured to move across the lawn; a rotary rake rotatably attached to the chassis, the rotary rake having an axis of rotation that ranges between 3 degrees and 25 degrees from the normal direction to the lawn while the chassis moves across the lawn; and a blower attached to the chassis, the blower being configured to produce a diverging flow of air that is generally tangent to a lowest portion of the circumference of the rotary rake while the chassis moves across the lawn, such that the rotation of the rotary rake and the produced diverging flow of air impel lawn debris in combination. - View Dependent Claims (12, 13, 14, 15)
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Specification