F. P. Bourgault Industries Air Seeder Division Ltd.

F. P. Bourgault Industries

Stanley Boyko

Darryl Kerr

Gerard F Bourgault

Roger Reiter

Nadina Boyko

Garry Kupchinski

An agricultural drawbar adapted to be pulled by a power source and used for farming operations such as spraying or harrowing, is equipped with right and left wing booms which are adapted to be folded or unfolded from the transport to operating positions. To enable the drawbar to move more quickly and easily from one position to another, lockable inner caster wheels are attached to a tensioning/control assembly which is attached to the cart. During the folding process the inner lockable caster wheels are progressively turned as the wings move to the folded transport position, thus easing the implement quickly into the transport position without skidding or binding of the wheels. Furthermore, a semi-lockable outer caster wheel is adapted to rotate inwardly to a toe-out position to facilitate the unfolding of the drawbar when the drawbar is pushed rearwardly.

Castering wheel assemblies for an auto-fold agricultural drawbar

An active rotary harrow is towed with its longitudinal horizontal axis at an acute angle relative to a line perpendicular to the direction of travel. A plurality of unitary tines are mounted by bolts or rivets on mounting plates which are secured to a shaft aligned along the horizontal axis. Each tine is made from spring steel which is flattened on one end, the flattened portion being mounted directly on the mounting plate by two or more fasteners. The tines are curved such that the outer end of the tine, being rounded in shape, is directed towards the trailing end of the harrow when in operation. The tines, and to a lesser extent, the mounting plates, are resilient in nature and can be deflected towards the trailing end of the harrow, when obstacles such as rocks are encountered. The tines are also capable of some pivotal deflection, to a lesser extent.

Rotary or active harrow

For use with agricultural sprayers, a unique spray shield is disclosed. The shields are mounted in pairs along the wet spray boom fore and aft in approximately the same plane, thereby shielding the nozzles of the sprayer. The shields are elongate and each is equipped with an air intake opening facing away from the wet spray boom. An air outlet of smaller cross-section is located at the bottom of each shield. As the sprayer moves in a direction against the wind, air enters the intakes of the fore shields and is directed downwardly and outwardly at a greater velocity thereby producing a curtain of air immediately in front of the sprayed area, thereby breaking the wind and avoiding disruption of the spray. Similarly, on the return passage over the land when the wind is blowing from the rear of the implement, the spray shields on the rear of the spray boom entrap the air and turn it downwardly, again creating a curtain of air behind the sprayed area.

Spray shield

The invention herein discloses an improved and unique new sprayer implement for spraying crops. The sprayer comprises two wing booms, a left and a right which are controlled independently from one another by hydraulic cylinders. The sprayer is capable of maintaining one wing boom in the transport position while the other main wing boom is extended transversely to the direction of travel in the operating position therefore allowing the operator to spray with one side of the sprayer only. This allows the operator to have access to areas of a field where he would not normally be able to work with a wide sprayer. The sprayer is also equipped with an anti-damage locking system whereby a resilient spring or shear pin is released when either one of the main wing booms strikes an obstacle such as a tree or power pole.

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St. Brieux, Canada

Stanley Boyko