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US 4,907,652 AGranted
Packer harrow implement
AssigneeRenn-Vertec Inc.
InventorsJames W. Henry, Paul G. Nadeau
Life of this patent
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AssigneeRenn-Vertec Inc.
InventorsJames W. Henry, Paul G. Nadeau
Estimating the term…
An agricultural implement is disclosed wherein soil packer coils are mounted directly to and between rearwardly extending harrow bars which, in turn, are connected to transversely extending frame members. The harrow tines are located behind the soil packer coils. Each coil is pivotally mounted between a respective pair of harrow arms by means of a pair of link arms which are also free to pivot about the axis of rotation of the coils so that the coils maintain uniform ground engaging contact independent of any up and down movement of the harrow arms. In one exemplary embodiment, the link arms are provided with axially shortened stub shafts which extend toward each other, generally coincident with the longitudinal axis of the coil, and generally perpendicular to the respective link arms. The stub shafts are receivable within apertures provided in support plates fixed at either end of the coil. In addition, the support plates have affixed thereto, on either side of the apertures, roller bearing assemblies which enable the coil to rotate freely about the otherwise non-rotatable stub shafts. In another exemplary embodiment, the stub shafts are replaced by half-shafts which extend along the longitudinal axis of the coil, and are separably joined approximately mid-way along the axis of the coil by a sleeve bushing.
An agricultural implement adapted for towing behind a driven vehicle in a first forward direction and comprising:
An agricultural implement adapted for towing behind a driven vehicle in a first forward direction and comprising:
A soil packer and harrow implement comprising frame means extending generally transverse to a normal forward direction of movement of the implement;
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Rollers: with special additional arrangements
With non-smooth surface formed of rotatably-mounted rings or discs or with projections or ribs on the roller body; Land packers: the soil-pressing…
With two or more soil-working tools of different kind: with a rotating, soil working support element, e.g. a roller
Soil working in agriculture or forestry
Term ended 27 Jan 2009 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention relates generally to an agricultural implement having a plurality of soil packer units in the form of helical coils which are positioned forward of a harrow assembly, the implement adapted for towing behind a vehicle.
Compaction of soil in the vicinity of newly planted seed has long been known to substantially increase crop yield. It is known to provide soil compaction by a number of relatively heavy packing wheels mounted on a cultivator, but this arrangement has not been completely satisfactory.
More recently, increased interest has been directed toward the concept of soil compaction by means of a series of helical coil packers extending rearwardly of associated harrow assemblies. Examples of such arrangements are shown in U.S. Pat. No. 4,418,762 and Canadian patent Nos. 838,417, 871,991, 1,081,021, 1,099,566, and 1,212,569. However, this arrangement has disadvantages in that clumps or clods of soil, weeds and other debris loosened and raised by the harrow assemblies, are pressed back into the soil by the soil packers.
FIG. 1 is a partial plan view, in schematic form, of a packer/harrow implement in accordance with the invention;
FIG. 2 is a side schematic view taken along the line 2--2 of FIG. 1;
FIG. 3 is a partial plan view of a soil packer coil mounting arrangement in accordance with a first exemplary embodiment of the invention;
An agricultural implement in accordance with the invention, and broadly designated by the numeral 10 in FIG. 1, includes a conventional hitch structure 12 having a forward end portion 14. The hitch structure 12 is supported by two pair of wheels 16, and the forward end portion 14 of the hitch structure 12 is adapted for connection to a towing vehicle (not shown) that is movable in an advancement direction over the ground and along a path of travel, in a direction indicated by the arrow 18.
As best illustrated in FIG. 1, the implement 10 has a main frame 20 supported by wheels (not shown) at opposite ends thereof, and which comprises a center section or member 22 and side sections or members 30 and 32. Auxiliary frame member 28 is attached to the center section 22 in a conventional manner. The overall configuration of the implement frame, hitch and associated means by which the frame sections may be pivoted to an inoperative or transport position may be generally similar to the above-identified Morris implement and form no part of this invention. Accordingly, no detailed description of these aspects of the implement are required here.
The implement 10 further includes a number of soil packer coils 34 which are disposed directly behind the respective frame members 28, 30 and 32. Each of the packer coils 34 comprises a generally cylindrically shaped helical coil as best seen in FIGS. 1, 3 and 4.