Disk harrow

Claim 2

An implement including a pair of mobile frame means normally disposed in a side-by-side operating position, and means connecting said frame means for relative pivotal movement when in their operating position, and for relative pivotal movement between said operating position and a transport position wherein one of said frame means is inverted relative to its operating position and disposed above the other of said frame means, said connecting means comprising: a first pivot means on one of said frame means; a second pivot means on the other of said frame means; rigid link means interconnecting said first and second pivot means; lift arm means swingable about said first pivot means and engageable with said link means to swing said link means about said first pivot means and thereby move said other frame means from its operating toward its transport position, said lift arm being freely movable toward and away from said link means when the frame means are in their operating position; abutment means on said lift arm; means for pivotally moving said other frame means about said second pivot means relative to said lift arm means as said other frame means is moved from its operating toward its transport position; and stop means on said other frame means movable therewith relative to said lift arm means as said other frame means is moved from its operating toward its transport position, said stop means being movable to a position wherein it is engageable by said abutment means to limit free movement of said lift arm means away from said link means.

Claim 3

The invention defined in claim 1 wherein said stop means has an arcuate surface engageable by said abutment means, said surface being formed about the axis of said second pivot means.

Claim 4

An implement including a pair of frames normally disposed in a side-by-side operating position; and means connecting said frames for relative pivotal movement when in their operating position and for relative pivotal movement between their operating position and a transport position wherein one of the frames is inverted relative to its operating position and disposed above the other frame, said means comprising: first longitudinal pivot means on one of the frames; second longitudinal pivot means on the other frame; a rigid link interconnecting the first and second pivot means; third longitudinal pivot means on said other frame above the second pivot means; elongated structure having opposite ends and an axis of elongation; means rigidly connecting one end of the structure to said one frame; and means connecting the other end of the structure to the other frame for pivotal movement about the axis of the third pivot means and for sliding movement along a path coincident with said axis of elongation, said path intersecting said axis of the third pivot means, the distance between the axes of said first and second pivot means being greater than that between the axes of said second and third pivot means.

Claim 5

An implement including a pair of frames normally disposed in a side-by-side operating position; and means connecting said frames for relative pivotal movement when in their operating position and for relative pivotal movement between their operating position and a transport position wherein one of the frames is inverted relative to its operating position and disposed above the other frame, said means comprising: first longitudinal pivot means on one of the frames; second longitudinal pivot means on the other frame; a rigid link interconnecting the first and second pivot means; third longitudinal pivot means on said other frame above the second pivot means; elongated structure having opposite ends and an axis of elongation; means rigidly connecting one end of the structure to said one frame; and means connecting the other end of the structure to the other frame for pivotal movement about the axis of the third pivot means and for sliding movement along a path coincident with said axis of elongation, said path intersecting said axis of the third pivot means, the distance between the axes of said first and second pivot means being greater than that between the axes of said second and third pivot means.

Claim 6

The invention defined in claim 3 wherein said elongated structure comprises a channel member having spaced leg portions, and wherein said means connecting the other end of the structure to the other frame comprises a roller supported on the other frame for rotation about the axis of the third pivot means and received between and engageable with the leg portions of said channel member.

Claim 7

The invention defined in claim 3 wherein one of said first and second pivot means comprises a longitudinally extending, rotatably supported tube, and including at least two parallel rigid link members fixed to said tube at longitudinally spaced points thereon, said link members being pivotally connected to the other of said first and second pivot means.

Claim 8

The invention defined in claim 5 including an extensible and retractable hydraulic ram interconnecting at least one of said Link members with one of said frames and operative to move said frames between their operating and transport positions.

Claim 9

An implement including a pair of frames normally disposed in a side-by-side operating position, and means connecting said frames for relative pivotal movement when in their operating position and for relative pivotal movement between their operating position and a transport position wherein one of the frames is inverted relative to its operating position and disposed above the other frame, said means comprising: first longitudinal pivot means on one of the frames; second longitudinal pivot means on the other frame above said first pivot means; first rigid link means interconnecting the first and second pivot means; third longitudinal pivot means on said other frame below the second pivot means; fourth longitudinal pivot means on said one frame above the first and third pivot means; and second rigid link means interconnecting the third and fourth pivot means, the distance between the axes of the second and fourth pivot means being greater than that between the axes of the first and third pivot means when the frames are disposed in their side-by-side operating position; a lift arm swingable about the first pivot means and engageable with the first link to swing said link about the first pivot means and thereby move said other frame from its operating position toward its transport position, said lift arm being freely movable toward and away from the first link when the frames are in their operating position; abutment means on the lift arm; and stop means on said other frame movable therewith relative to the lift arm as the other frame is moved toward its transport position, said stop means being movable with said other frame to a position relative to the abutment means wherein it is engageable with the abutment means to limit movement of the lift arm away from the first link.

Claim 10

An implement including a pair of frames normally disposed in a side-by-side operating position, and means connecting said frames for relative pivotal movement when in their operating position and for relative pivotal movement between their operating position and a transport position wherein one of the frames is inverted relative to its operating position and disposed above the other frame, said means comprising: first longitudinal pivot means on one of the frames; second longitudinal pivot means on the other frame above said first pivot means; first rigid link means interconnecting the first and second pivot means; third longitudinal pivot means on said other frame below the second pivot means; fourth longitudinal pivot means on said one frame above the first and third pivot means; and second rigid link means interconnecting the third and fourth pivot means, the distance between the axes of the second and fourth pivot means being greater than that between the axes of the first and third pivot means when the frames are disposed in their side-by-side operating position; a lift arm swingable about the first pivot means and engageable with the first link to swing said link about the first pivot means and thereby move said other frame from its operating position toward its transport position, said lift arm being freely movable toward and away from the first link when the frames are in their operating position; abutment means on the lift arm; and stop means on said other frame movable therewith relative to the lift arm as the other frame is moved toward its transport position, said stop means being movable with said other frame to a position relative to the abutment means wherein it is engageable with the abutment means to limit movement of the lift arm away from the first link.

Claim 11

The invention defined in claim 7 wherein at least one of said longitudinal pivot means comprises a longitudinally extending, rotatably supported tube, and wherein one of said link means comprises at least two parallel link members fixed to said tube at longitudinally spaced points thereon.

Claim 12

The invention defined in claim 8 including an extensible and retractable hydraulic ram operable between at least one of said link members and one of said frames to move said frames between their operating and transport positions.

Claim 13

The invention defined in claim 7 wherein the stop means has an arcuate surface engageable with the abutment means, said arcuate surface being formed about the axis of the second pivot means.

Claim 14

The invention defined in claim 7 including an extensible and retractable hydraulic ram interconnecting said one frame and said lift arm for swinging the arm about the first pivot means.