Flexible cutting line with controlled drag

Details Flexible cutting line with controlled drag Flexible cutting line with controlled drag

1993-07-21

1995-06-13

Ryan, Patrick J.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428397, 428400, 30347, 30351, 30353, 30356, 30357, 30216, 56233, 56238, D02G 300

Patent

active

054241286

ABSTRACT:
A monofilament line for a rotating string trimmer has a main body portion of a generally circular configuration. One or more sharp longitudinal cutting edges are integrally formed with the main body portion and protrude from the main body portion at an angle selected to cause controlled flex and asymmetrical drag on the cutting element, as it is rotated by a rotating string trimmer. This causes a torsional rotation of the free end of the line as it is rotated; so that the main body portion of the cutting element first strikes the object to be cut, followed by contact with the sharp cutting edge. This configuration is selected to cause cleaner cuts of grass and the like, with less shredding of the cut ends of the grass blades. In addition, larger vegetation such as weeds and small stalky shrubs may be efficiently cut without abnormally high wear of the cutting line.

REFERENCES:
patent: 2743511 (1956-05-01), Genovese
patent: 3831278 (1974-08-01), Voglesonger
patent: 4054993 (1977-10-01), Kamp
patent: 4118865 (1978-10-01), Jacyno
patent: 4126991 (1978-11-01), Gobin
patent: 4186239 (1980-01-01), Mize
patent: 4869055 (1989-09-01), Mickelson
patent: 4905465 (1990-03-01), Jones
patent: 5048278 (1991-09-01), Jones
patent: 5057368 (1991-10-01), Largman
patent: 5141811 (1992-08-01), Kawakami
patent: 5208106 (1993-05-01), Tung
patent: 5220774 (1993-06-01), Harbeke et al.
patent: 5276969 (1994-01-01), Luick

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