Self-contained flexible aerodynamic cutting element with...

A - Human Necessities – 01 – D

Patent

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A01D 34/00 (2006.01) A01D 34/416 (2006.01)

Patent

CA 2320372

A vegetation cutter, a cutting string for use with a vegetation cutter, and a method of cutting vegeta-tion, are provided which uti-lize a novel cutting string (13) arrangement in which a twist (19) and living hinge (19A) are provided in a cut-ing string having a drag co-efficient of less than 1.0, cypically with a first long axis and a second short axis, the second axis less than 85 % of the first axis. The twist (19) is provided be-tween the free end (79) of the string (13) and where the string is mounted to the head (76), or where two twists are provided in the string (13), the string is mounted to the head at a central portion be-tween the twists (19). The string may be mounted to the head by grooves or slots (80) and/or clamping mech-anisms, or a wide variety of other components. The cut-ting string may have a wide variety of cross-sectional configurations (both symmetrical, such as elliptical, or non-symmetrical, such as substantially tear drop). The twist is typically between about 30-150°, most desirably about 90°.

L'invention concerne un dispositif de coupe de végétation, un fil coupant destiné audit dispositif et des procédés pour couper des végétaux, fondés sur l'utilisation d'un nouveau mécanisme de fil coupant (13) dans lequel le fil coupant comporte une torsade (19), fonctionne comme une charnière "vivante" (19A) et possède un coefficient de traînée inférieur à 1,0. En règle générale, le fil coupant comporte un premier axe long et un second axe court, le second axe représentant moins de 85 % du premier. La torsade (19) se trouve entre le bout libre (79) du fil (13) et la partie du fil par laquelle il est fixé à la tête (76). Lorsqu'il y a deux torsades (19), le fil est fixé à la tête par la partie située entre ces torsades (19). Le fil coupant peut être attaché à la tête au moyen de rainures, de fentes (80) et/ou de dispositifs de serrage, ou encore au moyen des éléments les plus variés. Le fil coupant peut avoir toute une série de profils en coupe (symétrique, par exemple, elliptique, ou asymétrique, par exemple, en forme de larme). La torsade (19), généralement comprise entre 30 DEG et 150 DEG , est de préférence de 90 DEG .

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