Extra heavy duty multi-disc harrow with automatic level control

Claim 2

An implement frame construction for carrying disc harrow elements adapted to be pulled with a drawbar connected to a tractor for working uneven as well as even surfaces of the earth, comprising: a unitary front frame section adapted to be connected to the drawbar, said front frame section being generally rectangular and having front and rear transverse members, and side members of equal length, connection means for said drawbar on said front transverse member, a generally rectangular unitary rear frame section having front and rear transverse members, and side members equal in length, an elongated unitary frame forming a left frame section and an elongated unitary frame forming a right frame section for said implement frame, said left and right frame sections being substantially longer in length than the combined length of said front and rear frame sections, said front and rear frame sections being assembled with said right and left frame sections at the opposite ends thereof so that said front and rear frame sections are spaced apart longitudinally, whereby to provide a complete implement frame, and securing means holding all of said frame sections in assembled relation in a manner to permit transverse and diagonal flexing of said implement frame, said implement frame providing a mounting for said disc harrow elements which permits said disc harrow elements to follow the contour of the earth as the tractor pulls the implement frame.

Claim 3

An implement frame construction for carrying disc harrow elements adapted to be pulled with a drawbar connected to a tractor for working uneven as well as even surfaces of the earth, comprising: a unitary front frame section adapted to be connected to the drawbar, said front frame section being generally rectangular and having front and rear transverse members, and side members of equal length, connection means for said drawbar on said front transverse member, a generally rectangular unitary rear frame section having front and rear transverse members, and side members equal in length, an elongated unitary frame forming a left frame section and an elongated unitary frame forming a right frame section for said implement frame, said left and right frame sections being substantially longer in length than the combined length of said front and rear frame sections, said front and rear frame sections being assembled with said right and left frame sections at the opposite ends thereof so that said front and rear frame sections are spaced apart longitudinally, whereby to provide a complete implement frame, and securing means holding all of said frame sections in assembled relation in a manner to permit transverse and diagonal flexing of said implement frame, said implement frame providing a mounting for said disc harrow elements which permits said disc harrow elements to follow the contour of the earth as the tractor pulls the implement frame.

Claim 4

An implement frame construction for carrying disc harrow elements adapted to be pulled with a drawbar connected to a tractor for working uneven as well as even surfaces of the earth, comprising: a unitary front frame section adapted to be connected to the drawbar, said front frame section being generally rectangular and having front and rear transverse members, and side members of equal length, connection means for said drawbar on said front transverse member, a generally rectangular unitary rear frame section having front and rear transverse members, and side members equal in length, an elongated unitary frame forming a left frame section and an elongated unitary frame forming a right frame section for said implement frame, said left and right frame sections being substantially longer in length than the combined length of said front and rear frame sections, said front and rear frame sections being assembled with said right and left frame sections at the opposite ends thereof so that said front and rear frame sections are spaced apart longitudinally, whereby to provide a complete implement frame, and securing means holding all of said frame sections in assembled relation in a manner to permit transverse and diagonal flexing of said implement frame, said implement frame providing a mounting for said disc harrow elements which permits said disc harrow elements to follow the contour of the earth as the tractor pulls the implement frame.

Claim 5

A frame construction as defined in claim 1, wherein the securing means comprises nuts and bolts.

Claim 6

A frame construction as defined in claim 1, wherein the left and right frame sections each have front and rear transverse components that overlie portions of the front and rear frame sections, respectively, and are bolted thereto.

Claim 7

A frame construction as defined in claim 3 wherein the rear transverse components of the left and right frame sections are arranged on an angle with respect to each other and converge in a direction toward the front frame section, whereby to stiffen the frame in a longitudinal direction.

Claim 8

A frame construction as defined in claim 4, wherein the rear frame section has a pair of converging transverse rear components disposed on the same angle as the transverse rear components of the left and right frame sections and being secured thereto.

Claim 9

A frame construction as defined in claim 1, wherein the left and right frame sections each include parallel, longitudinal inner and outer angle iron components spaced apart and interconnected by front and rear transverse components; and wherein the front and rear frame sections each include longitudinal side components underlying and bolted to said angle iron components, and further include front and rear transverse components, each having a bracket mounted thereon adjacent its opposite ends; and wherein said brackets are bolted to said inner angle iron components.

Claim 10

A frame construction as defined in claim 1 wherein the left and right frame sections are identical and each includes an inner and an outer longitudinal angle iron component and front, rear and a plurality of intermediate transverse components welded to the inner and outer angle iron components, the front and rear transverse components having portions extending inwardly beyond the inner longitudinal angle iron components, said securing means connecting said front and rear frame sections to said inwardly extending portions and to said inner longitudinal angle iron components.

Claim 11

A frame construction as defined in claim 1, in which the side members of the front frame section each have an inner edge, and wherein the front and rear members are transverse angle irons welded to said side members, and wherein each of said front and rear angle irons has brackets welded thereto, each bracket having an outer face aligned with an inner edge of one of the side members, said securing means connecting the inner angle iron components of said side frame sections to said brackets and said side members.

Claim 12

A frame construction as defined in claim 5, in which the rear frame section further comprises a centrally disposed member parallel with said side members and being welded to said front transverse member and to said pair of converging rear members.

Claim 13

A frame construction as defined in claim 9, wherein the side members of the rear frame sectioN have an inner edge, and wherein the front transverse member of the rear frame section is an angle iron and has brackets welded thereto, each bracket having an outer face aligned with the inner edge of one of the side members, respectively, said securing means connecting the inner angle iron components of the side frame to the brackets and side members.

Claim 14

A frame construction as defined in claim 10, wherein the rear converging members of the rear frame are angle irons each having a plate welded thereto, each plate having an outer face aligned with the inner edge of one of the side members.

Claim 15

A frame construction as defined in claim 1, including a wheel carriage assembly comprising: a shaft pivotally connected with the main frame and a lever secured to said shaft; and including additionally means for maintaining said main frame level including: a channel member mounted upon said front frame section; a pivot plate fixed to said channel member; a hydraulic cylinder having one end thereof pivotally connected to said pivot plate and having a piston rod extending from the other end thereof and connected with the lever on the shaft of the wheel carriage assembly; links having one end thereof pivotally connected with said channel member and having its opposite end connected with the other end of said links; a second pair of links having one end thereof pivotally connected with said fulcrum lever at substantially the midpoint thereof; a pair of uprights secured to said channel member; a bell crank pivotally mounted upon said uprights and having a rearwardly extending arm connected with the other end of said second pair of links, said bell crank having forwardly extending arms; a bar pivotally connected with the forwardly extending arms of said bell crank; a pair of threaded members extending through said bar; springs on said threaded members on opposite sides of said bar; adjusting nuts on said threaded member for adjusting said springs so that the compression therein is equal, to thereby maintain the sliding bar in a position of equilibrium relative to said threaded members; a draw bar pivotally connected to said main frame; and means connecting said draw bar with the lower end of said threaded members.

Claim 16

A frame construction as defined in claim 6, wherein the longitudinal components of the left and right frame sections have spaced holes; and wherein gang disc frames are adjustably mounted upon said left and right frame sections by bolts passing through selected ones of said holes.