US 4,542,793 A · One-pass complete tillage system

Abstract

The system includes a pull-type frame with a forward line of disc blades widely spaced to part the trash, mix it with soil and displace most of the mixture laterally on top of previously undisturbed soil, thereby creating strips of ground which are alternately cleared and windrowed. At least a second line of disc blades, also widely spaced, is placed to the rear of the first line; and these blades are offset laterally from, and located in the windrows formed by, the discs of the first row, to part and return at least some of the previously cleared trash and previously undisturbed soil back onto the cleared strips while still leaving strips of undisturbed soil with an accumulation of cleared trash on top. Cooperating with the discs are novel plow points located in the undisturbed strips having accumulated layers of cleared trash. In one embodiment, strips of untilled soil are left only between the non-working surfaces of a pair of associated blades (one of the forward line and one of the rear), and in another case, strips are left between the working and the non-working surfaces of associated blades. Plow points are located to till all such strips.

Claims10

Dependent claims

An agricultrual implement comprising:

A main frame adapted for attachment to a traction vehicle and including ground support wheels;
a first set of tools carried by said main frame;
first hydraulic power means for adjusting the elevation of said main frame relative to said ground support wheel;
a sub-frame;
a second set of tools carried by said sub-frame;
adjustable linkage means including a four-bar linkage for connecting said sub-frame to said main frame to maintain said sub-frame generally parallel to said main frame;
rock shaft means mounted for rotation on said main frame;
second hydraulic power means operated independently of said first hydraulic power means for rotating said rock shaft and said four-bar linkage in adjusting the elevation of said sub-frame relative to said main frame;
said adjustable linkage means including rigid link means interconnecting said sub-frame and said rock shaft whereby an upward force on said sub-frame will be transmitted to said rock shaft and tend to rotate the same.

6 more elements

In an agricultural tillage apparatus adapted to be pulled by a vehicle, including a main frame adapted to carry a first set of ground working tools;

wheel means coupled to said main frame for supporting and carrying said main frame;
and first lift means coupled to said wheel means and main frame for raising and lowering said main frame, the improvement comprising:
a sub-frame carried by said main frame at a location forward of said first set of tools;
a second set of ground working tools mounted to said sub-frame, at least some tools of said second set being located forward of other tools of said second set;
second lift means coupled between said main frame and said sub-frame for adjusting the height of said sub-frame relative to said main frame and including forward and rear rock shafts rotatably mounted to said main frame;
power means coupled to one of said rock shafts for rotating it;
first link means for connecting said rock shafts together such that they rotate together about their respective horizontal axes;
forward and rear rigid link means for connecting said forward and rear rock shafts respectively to a forward and a rear part of said sub-frame, and arranged to maintain said sub-frame substantially horizontal for all settings of working depth of said second set of tools.

5 more elements

Dependencies are inferred from the claim text.

One-pass complete tillage system

Life of this patent

One-pass complete tillage system

Life of this patent

Abstract

Claims10