Cutlery – Cutting tools – With blade moving means
Patent
1999-06-04
2000-12-19
Payer, Hwei-Siu
Cutlery
Cutting tools
With blade moving means
30347, 428397, A01D 34416
Patent
active
061612928
ABSTRACT:
An elongated flexible cutting string, or substantially self-supporting strut cutting element, is connectable to a rotating device for use in a method of cutting vegetation. The cutting string has numerous advantages over conventional cutting strings, having a drag coefficient which is at least about 5% (e.g. 10-300%) less than the drag coefficient of a string having a substantially round and smooth cross-section. The drag coefficient of aerodynamic line 10 is 1.0 or less, e.g. about 0.35 or less. The cross-sectional configuration preferably simulates a tear drop (with or without an extension nose), and can have a textured (e.g. with golf ball simulating dimples, saw toothed or a wavy configuration) exterior surface. The pitch of the line is positively maintained while it is rotated in a cutting plane, e.g. controlled with an eyelet and/or a compound taper. Other cross-sectional configurations are an ellipse of at least 1.25:1 ratio, those that simulate a spearhead, keyways of different sorts, a diamond with rounded apices, or an ice cream cone. When a single string having a dimension perpendicular to the direction of movement of about 0.08 inches is rotated it uses less than the theoretical equivalent of 200 watts of power at about 9000 rpm for a 14 inch swath and 3.5 inch diameter rotating head.
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Morabit Vincent D.
Morabito Christopher J.
Morabito Michael Z.
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