Vegetation control material applicator

A - Human Necessities – 01 – M

Patent

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Details

A01M 21/04 (2006.01) A01G 3/06 (2006.01) A01M 11/00 (2006.01)

Patent

CA 2204233

The vegetation control material applicator comprises a toroidal reservoir for containing a nominal amount of vegetation control material in fluid form and a circular valve assembly mounted between the reservoir and the circular saw blade of a brush saw. The reservoir and the valve assembly are mountable on the arbour of the brush saw with the valve assembly being in contact with the underside surface of the saw blade. The reservoir and valve assembly each have a diameter which is substantially less than the diameter of the saw blade. The reservoir has an opened side which is in communication with the valve assembly. The valve assembly comprises a valve disc and a valve seat. The valve disc is made of a material having the ability to resonate and to sustain a vibration therein. The valve seat is made of a material having vibration dampening properties. Therefore when an impulse is imparted by the saw blade to the valve assembly, a distortion of the valve disc relative to the valve seat causes the valve assembly to release a slight amount of vegetation control material on the underside surface of the saw blade. In another aspect of the present invention, the valve assembly comprises a set of spacers between the valve disc and the valve seat. The spacers are made of absorbent material and have a total thickness related to the viscosity index of the vegetation control material within the reservoir of the applicator.

L'applicateur de produit débroussaillant objet de l'invention se compose d'un réservoir toroïde renfermant une petite quantité de produit débroussaillant liquide et un robinet doseur circulaire monté entre le réservoir et la lame circulaire d'une scie d'éclaircissage. Le réservoir et le robinet doseur se montent sur l'arbre d'entraînement de la scie, le robinet étant en contact avec la face inférieure de la lame de scie. Le réservoir et le robinet doseur ont tous deux un diamètre sensiblement plus petit que la lame de scie. Le réservoir comporte une ouverture donnant sur le robinet doseur qui se compose d'un obturateur et d'un siège d'obturateur. L'obturateur est en matériau vibratile capable d'entretenir la vibration tandis que le siège d'obturateur est en matériau antivibratile. Ainsi, sous l'impulsion des vibrations de la lame de scie, l'obturateur se déforme sur son siège pour rompre l'étanchéité du joint et libérer une faible quantité de produit débroussaillant qui mouillera la face inférieure de la lame de scie. Selon une variante de l'invention, le robinet doseur comprend, entre l'obturateur et son siège, une série d'espaceurs en matériau absorbant dont l'épaisseur est fonction de l'indice de viscosité du produit débroussaillant versé dans le réservoir.

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