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US 7,841,159 B2Granted
Rotary mower blade integrating aerodynamic elements
OwnerEdward Nollie Washburn, IVinventor
Life of this patent
Estimating the term…
Abstract
An embodiment of an overall approximately rectangular rotary mower blade, affixed to a powered support shaft, where the support shaft rotates the blade tines on a rotational plane parallel to the vegetation to be cut, where the blade employs aerodynamic tines preceding the main cutting edge. Features of the aerodynamic tines improve cutting, mulching, and safety of mower operation.
Claims6
A blade for cutting vegetation, the blade connected to an external drive structure for rotating the blade through the vegetation, the blade comprising:
- a horizontal body member provided with a first end and a second end opposite said first end, each of said first and second ends provided with a primary cutting tine and a secondary cutting tine, each of said secondary cutting tines located anterior to each of said primary cutting tines in the direction of the rotation of the blade, each of said primary cutting tines and each of said secondary cutting tines provided with a forward cutting surface and a trailing surface, said forward cutting surface of each of said secondary tines is provided with a positive angle of attack, wherein said forward cutting surface of each of said secondary tines is directed upwardly.
Dependencies are inferred from the claim text.