Twisted and self-sharpening lawn equipment blades

Details Twisted and self-sharpening lawn equipment blades Twisted and self-sharpening lawn equipment blades

A - Human Necessities

01

D

A01D 34/63 (2006.01) A01D 34/00 (2006.01) A01D 34/52 (2006.01)

Patent

CA 2494903

A cutting blade, especially a blade for lawn equipment, comprising at least one spindle (110) section and at least one blade member (100). The blade member extending radially from the at least one spindle section along a longitudinal axis of the blade member. The blade member terminating in a distal end (120) and having a direction of rotation. The blade member having a first blade surface and second blade surface. An at least one cutting surface connects the first and second blade surface at a cutting angle relative to the plane of the second blade surface. Also, the blade has an at least one trailing surface relative to the direction of rotation of the blade member. The blade member having a twisted portion rotated at a twist angle substantially throughout the entire cross section of the twisted portion.

L'invention concerne une lame tranchante, en particulier une lame pour équipement pour pelouse, comprenant au moins une section tige et au moins un élément lame. Ledit élément lame s'étendant radialement de la section tige le long de l'axe longitudinal de l'élément lame. Ledit élément lame se termine par une extrémité distale et présente un sens de rotation. Ledit élément lame présente une première surface de lame et une seconde surface de lame. Sur au moins une des surfaces coupantes, la première et la seconde surface de lame sont reliées sur au moins un angle de coupe par rapport au plan de la seconde surface de lame. Ainsi la lame présente au moins une surface longitudinale par rapport au sens de rotation de l'élément lame. Ledit élément lame présente une partie torsadée orientée sur un angle de torsion sensiblement d'un bout à l'autre de la section transversale entière de ladite partie torsadée.

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