Soil cultivating implement combinations

• US 3,983,943 A
• Filed: 10/29/1974
• Issued: 10/05/1976
• Est. Priority Date: 10/29/1973
• Status: Expired due to Term

• Current Assignee: Cornelis Van Der Lely
• Original Assignee: Cornelis Van Der Lely
• Inventors: van der Lely, Cornelis
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US05/518,742
• Time in Patent Office: 707 Days
• Field of Search: 172/59, 172/63, 172/71, 172/169, 172/70, 172/78
• US Class Current: 172/47
• CPC Class Codes: A01B 49/025 about a substantially vertical axis

Abstract

A combination implement has a leading cultivator with fixed tines and a rear rotary harrow with driven soil working tined members. The cultivator has side ground wheels with vertical adjusting means that controls the working depths of the fixed tines. The harrow has a trailing roller that is interconnected to the harrow frame with arms that also have an adjustment feature so that the working depths of the harrow'"'"'s tined members can be regulated. The cultivator and harrow are linked to one another by a parallelogram linkage so that they can be disconnected from one another and individually connected to the three point lift of a prime mover. When the combination is assembled, a suspended drive shaft of the harrow'"'"'s driving system is passed through the cultivator and connected to the p.t.o. of the prime mover.

Claims

1. A soil cultivating implement combination comprising a forward cultivator having a main frame beam with downwardly extending tines secured to said beam, said beam extending transverse to the normal direction of travel of said combination, rotary ground support means connected to the lateral ends of said beam, said support means including an adjustment device to vertically regulate the working depths of said tines, a harrow linked to said cultivator at the rear thereof, said harrow comprising a frame and a plurality of soil working members rotatably mounted on said frame, driving means connected to said soil working members and a rear ground supporting roller connected to said frame by adjustable arm means, whereby the working depths of said soil working members can be controlled, said frame beam and frame being linked to one another by a linkage for relative independent vertical movements, said driving means including a driving shaft that extends forwardly through said cultivator for connection to a p.t.o. of a prime mover and said cultivator having coupling means for connection to a lifting hitch of the prime mover.

2. A soil cultivating implement combination comprising a cultivator with frame beam means and downwardly extending tines fixed to said beam means, said combination comprising a rotary harrow having a plurality of tined soil working members rotatably supported on a frame of said harrow, said soil working members being rotatable about corresponding upwardly extending shafts and driving means drivenly connected to said shafts, said beam means having at least one ground supporting member that regulates the working depths of the tines and the frame of said harrow being connected to a further ground supporting member that controls the working depths of said tined members and both said cultivator and said rotary harrow having corresponding coupling means that can be individually coupled to the three-point lifting device of a tractor.

3. A combination as claimed in claim 2, wherein said cultivator has a main beam to which said tines are fixed, and said beam extends transverse to the normal direction of travel, two ground supporting members being connected adjacent the lateral ends of said beam.

4. A combination as claimed in claim 3, wherein each supporting member is a ground wheel which is rotatable about an axis located to the rear with respect to the normal direction of travel and each ground wheel is connected to an adjusting device and is vertically adjustable in position with respect to said main beam.

5. A combination as claimed in claim 2, wherein said cultivator and harrow are pivotally interconnected to one another by linking elements.

6. A combination as claimed in claim 5, wherein the pivotal connections between said cultivator and harrow comprises arms that pivotally interconnect corresponding locations of said coupling means of the cultivator and harrow that are intended for connection to a three-point lifting device.

7. A combination as claimed in claim 6, wherein one of said arms extends to pivotally link the upper coupling points of said corresponding coupling means and that arm is adjustable in length.

8. A combination as claimed in claim 2, wherein said driving means includes a driving shaft and said shaft is held by a suspension bearing, said bearing being pivotally connected to said frame beam means of the cultivator.

9. A combination as claimed in claim 8, wherein said bearing is located behind said beam means with respect to the normal direction of travel and is turnable relative to said beam means about at least two non-parallel axes.

10. A combination as claimed in claim 9, wherein said bearing is turnable about three axes relative to a main beam of said beam means, two of said axes being extendable parallel to one another when the third axis is perpendicular to said two axes.

11. A combination as claimed in claim 10, wherein said third axis is located between the said two axes.

12. A combination as claimed in claim 2, wherein flexible means interconnect said frame beam means to said frame to prevent lateral swing of said harrow relative to said cultivator.

13. A combination as claimed in claim 12, wherein said flexible means comprises at least one pair of chains.

14. A combination as claimed in claim 13, wherein there are two pairs of chains, the chains of one of said pairs extending forwardly from the harrow to the cultivator in upwardly inclined convergent relationship while the two chains of the other of said pair extend forwardly from said harrow to said cultivator in divergent relationship.

15. A combination as claimed in claim 2, wherein said further supporting member is rotatable and positioned behind said soil working members with respect to the normal direction of travel and is connected to said frame by adjusting means and vertically adjustable in position relative to said soil working members.