Apparatus, systems and methods for steerable toolbars

Alan F. Barry, Nevada, IA (US); Jacob Christensen, Ames, IA (US); Kurt Townsend, Ames, IA (US); Loren Leusink, Ames, IA (US)

USPTO: us-12653085 · published 2026-06-16 · patents · A01B 69/006· A01B 59/004· A01B 69/004· A01B 73/065· A01B 59/042

Apparatus, systems and methods for steerable toolbars

Alan F. Barry, Nevada, IA (US) , Loren Leusink, Ames, IA (US) , Jacob Christensen, Ames, IA (US) , Kurt Townsend, Ames, IA (US) This is my paper

Pith reviewed 2026-06-19 21:00 UTC · model grok-4.3

classification patents A01B 69/006A01B 59/004A01B 69/004A01B 73/065A01B 59/042

keywords agricultural implementsteerable toolbardraft linkactuatorcontrolleralignmenthitchtowing vehicle

0 comments

The pith

An agricultural implement uses a controller to actuate a draft link and adjust toolbar angle to maintain alignment with the towing vehicle.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

This patent presents an agricultural implement that keeps its toolbar aligned with a towing vehicle during operation. The setup connects a toolbar with ground-engaging tools to an elongate attachment via a pin, adds a draft link controlled by an actuator, and uses a controller to change the toolbar's angle as needed. Alignment is maintained automatically through the hitch connection to the towing vehicle. A sympathetic reader would see value in how this mechanism supports consistent tool performance without constant manual corrections. The central claim rests on the controller's ability to drive these adjustments in real time.

Core claim

The patent claims an agricultural implement comprising a toolbar with a pin and at least one ground engaging tool, an elongate attachment with one end attached to the toolbar via the pin, a first draft link extending between the second end of the elongate attachment and the toolbar, a first actuator in operable communication with the first draft link to adjust the angle of the toolbar relative to the elongate attachment, and a controller in electronic communication with the first actuator configured to actuate the first draft link to maintain alignment of the agricultural implement with a towing vehicle connected to the elongate attachment by a hitch.

What carries the argument

The controller-actuator-draft link assembly that changes the toolbar angle relative to the elongate attachment to sustain alignment.

If this is right

The toolbar angle can be corrected automatically to keep ground engaging tools on target.
Misalignment stress on the hitch connection can be reduced during operation.
The implement can respond to changes in towing direction without separate steering mechanisms.
Ground engaging tool performance remains consistent as the toolbar tracks the vehicle's path.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

The system might combine with external positioning data to handle curved paths more precisely.
Similar angle-adjustment logic could apply to other towed farm equipment beyond toolbars.
Actuator response times would need calibration to avoid over-correction in high-speed towing.

Load-bearing premise

The design assumes the pin joint, draft link, actuator, and hitch will allow the needed angular adjustment without mechanical binding or failure and that the controller can achieve and sustain alignment with only the listed components.

What would settle it

A field test showing whether the toolbar stays aligned with the towing vehicle during turns or over uneven ground without the draft link binding or the actuator failing to respond.

read the original abstract

1 . An agricultural implement comprising: (a) a toolbar comprising: (i) a pin and (ii) at least one ground engaging tool; (b) an elongate attachment, a first end of the elongate attachment attached to the toolbar via the pin; (c) a first draft link extending between a second end of the elongate attachment and the toolbar; (d) a first actuator in operable communication with the first draft link, wherein actuation of the first draft link via the first actuator adjusts the angle of the toolbar relative to the elongate attachment; and (e) a controller in electronic communication with the first actuator, wherein the controller is configured to actuate the first draft link to adjust the angle of the toolbar relative to the elongate attachment to maintain alignment of the agricultural implement with a towing vehicle, the towing vehicle connected to the elongate attachment by a hitch.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Desk Editor's Note private letter to a colleague

This is a patent application for a toolbar alignment mechanism using standard ag parts plus a controller, with no data or tests.

read the letter

This patent application describes an agricultural implement with a toolbar pinned to an elongate attachment, a draft link running to the toolbar, an actuator on that link, and a controller that drives the actuator to keep the toolbar aligned with the towing vehicle.

The specific combination in the claims is the new part: the pin joint, the draft link actuator, and the controller configured to adjust the angle for alignment. Draft links and hydraulic actuators are common in farm equipment, but the closed integration for this steering function is what the filing puts forward.

The description does a clean job laying out the mechanical connections and the intended role of each piece. The abstract and claims are direct about how actuating the draft link changes the toolbar angle relative to the attachment.

The clear limitation is the total lack of evidence. There are no sensor details, no control algorithm, no simulation, and no test results showing that alignment is actually maintained or that the mechanism avoids binding under load. The functional claim stands on the design description alone.

This is normal for a patent, which prioritizes the invention disclosure over validation. It is aimed at equipment makers or patent searchers who need to track this configuration for prior art or development work.

I would not bring it to a reading group or cite it in research. It does not warrant scientific peer review because there is no empirical claim or analysis to evaluate.

Referee Report

0 major / 1 minor

Summary. The manuscript is a US patent application describing an agricultural implement for steerable toolbars. Claim 1 specifies a toolbar with a pin and ground-engaging tool, an elongate attachment connected at one end via the pin, a first draft link between the attachment's second end and the toolbar, a first actuator in communication with the draft link to adjust the toolbar angle relative to the attachment, and a controller in electronic communication with the actuator configured to actuate the draft link to maintain alignment of the implement with a towing vehicle connected via a hitch.

Significance. If the described mechanical and control elements function as stated, the apparatus could enable active steering or alignment correction for towed agricultural implements. However, the application consists solely of a component enumeration and functional description with no supporting analysis, simulations, performance metrics, or embodiment details to establish feasibility or advantages.

minor comments (1)

The provided text is limited to a single claim; if the full specification includes additional claims, figures, or detailed embodiments, they should be cross-referenced in the abstract for clarity.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for reviewing our patent application and for the recommendation to accept. The application describes a novel steerable toolbar apparatus as claimed.

read point-by-point responses

Referee: However, the application consists solely of a component enumeration and functional description with no supporting analysis, simulations, performance metrics, or embodiment details to establish feasibility or advantages.

Authors: Patent applications are governed by legal standards requiring a written description sufficient to enable one of ordinary skill in the art to make and use the invention, which the provided claims and description satisfy through detailed structural and functional elements. Empirical data, simulations, or performance metrics are not required for patentability and are outside the typical scope of such filings; the focus is on the inventive concept itself. revision: no

Circularity Check

0 steps flagged

No significant circularity

full rationale

This US patent is a functional description of mechanical components (toolbar, pin joint, draft link, actuator, hitch, controller) and their intended interactions. It contains no equations, derivations, fitted parameters, predictions, or self-citations. No load-bearing step reduces to its own inputs by construction; the text is a direct enumeration of apparatus elements. The Pith patterns (self-definitional, fitted-input-called-prediction, self-citation load-bearing, etc.) do not apply.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No mathematical model, fitted parameters, or theoretical axioms are invoked; the document is a functional description of physical components and their interconnection.

pith-pipeline@v0.9.1-grok · 5736 in / 1160 out tokens · 22858 ms · 2026-06-19T21:00:33.365189+00:00 · methodology

Apparatus, systems and methods for steerable toolbars

Core claim

What carries the argument

If this is right

Where Pith is reading between the lines

Load-bearing premise

What would settle it

discussion (0)