Flexible harrow device

Claim 2

A flexible harrow device for attachment to the rear of a cultivator having a rear frame comprising a pair of elongated first and second side beams, said side beams having their rearward ends pivotally mounted to the rear frame of the cultivator and extending rearwardly therefrom, said side beams each having a pair of relatively short elongated linkage members, a first and second short beam, relatively short in relation to said first and second beams, one of said pair of linkage members having its upper ends pivotally connected to said first side beam and its lower ends pivotally connected to said first short beam to provide a parallel linkage, said other of said pair of linkage members having its upper ends pivotally connected to said second side beam and its lower ends pivotally connected to said second short beam to provide a parallel linkage, a plurality of first short plates pivotally mounted about a horizontal axis to said first and second short beams, a plurality of second short plates pivotally mounted to said first short plates about an axis laterally of said first mentioned axis, a harrow support bar having its ends fixed to the second short plates between said first and second beams, with said pivotal mounting of said first short plates to said short beams and said pivotal mounting of said second short plates to said first short plates providing a pivotal connection about two axes perpendicular to one another at each end of the harrow bar between the harrow bar and frame to thereby provide a flexible connection between the harrow bar and frame for flexing action.

Claim 3

A flexible harrow device for attachment to the rear of a cultivator having a rear frame comprising a pair of elongated first and second side beams, said side beams having their rearward ends pivotally mounted to the rear frame of the cultivator and extending rearwardly therefrom, said side beams each having a pair of relatively short elonated linkage members, a first and second short beam, relatively short in relation to said first and second beams, one of said pair of linkage members having its upper ends pivotally connected to said first side beam and its lower ends pivotally connected to said first short beam to provide a parallel linkage, said other of said pair of linkage members having its upper ends pivotally connected to said second side beam and its lower ends pivotally connected to said second short beam to provide a parallel linkage, a plurality of first short plates pivotally mounted about a horizontal axis to said first and second short beams, a plurality of second short plates pivotally mounted to said first short plates about an axis laterally of said first mentioned axis, a plurality of harrow bars each having their one ends fixed to the second short plates of the first beam and first short beam of the frame, said plurality of harrow bars each having their other ends fixed to the second short plates of the second beam of the second short beam of the frame, with said pivotal mounting of said first short plates to said short beams and said pivotal mounting of said second short plates to said first short plates providing a pivotal connection about two axes perpendicular to one another at each end of the harrow bars between the harrow bars and frame to thereby provide a flexible connection between the harrow bars and frame for flexing action.

Claim 4

A flexible harrow device for attachment to the rear of a cultivator having a rear frame comprising a pair of elongated first and second side beams, said side beams having their rearward ends pivotally mounted to the rear frame of the cultivator and extending rearwardly therefrom, said side beams each having a pair of relatively short elonated linkage members, a first and second short beam, relatively short in relation to said first and second beams, one of said pair of linkage members having its upper ends pivotally connected to said first side beam and its lower ends pivotally connected to said first short beam to provide a parallel linkage, said other of said pair of linkage members having its upper ends pivotally connected to said second side beam and its lower ends pivotally connected to said second short beam to provide a parallel linkage, a plurality of first short plates pivotally mounted about a horizontal axis to said first and second short beams, a plurality of second short plates pivotally mounted to said first short plates about an axis laterally of said first mentioned axis, a plurality of harrow bars each having their one ends fixed to the second short plates of the first beam and first short beam of the frame, said plurality of harrow bars each having their other ends fixed to the second short plates of the second beam of the second short beam of the frame, with said pivotal mounting of said first short plates to said short beams and said pivotal mounting of said second short plates to said first short plates providing a pivotal connection about two axes perpendicular to one another at each end of the harrow bars between the harrow bars and frame to thereby provide a flexible connection between the harrow bars and frame for flexing action.