Harvesters – Tedders
Reexamination Certificate
2006-07-18
2006-07-18
Kovács, Árpád Fábián (Department: 3671)
Harvesters
Tedders
C056S377000
Reexamination Certificate
active
07076938
ABSTRACT:
A bifold rake for agricultural crop material includes a rear wheeled trolley and a forwardly extending drawbar adapted for interconnection with a tow vehicle such as a tractor. A pair of rake arms are pivotably interconnected to opposite sides of the trolley, and each rake arm carries a series of rake members such as rotatable rake wheels. An opening and closing mechanism is interposed between the drawbar and the rake arms, for moving the rake arms between open and closed positions. The rake includes a windrow width adjustment system for adjusting the width of a windrow of crop material formed by the rake, independent of adjustment in the width of the trolley. In one embodiment, the windrow width adjustment system is in the form of a variable position connection arrangement interposed between each rake arm and the trolley, for adjusting the lateral position of the rearward end of the rake arm so as to adjust the position of the innermost rake member. The variable position connection arrangement includes a transversely extending guide rod located on each side of the trolley, with a slidable engagement connection between the guide rod and the rearward end of the rake arm. An actuator, such as a rotatable screw assembly, is interconnected with the bracket arrangement for moving the bracket arrangement on the guide rod, to alter the position of the rearward end of the rake arm to adjust the position of the rearwardmost rake member. In another embodiment, each innermost rake member is interconnected with its respective rake arm via an angularly adjustable connection arrangement, which enables the innermost rake members to be pivoted toward and away from each other to adjust the windrow width.
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Boyle Fredrickson Newholm Stein & Gratz S.C.
Kovács Árpád Fábián
Tonutti S.p.A.
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