Rotary tedder having a lifting unit

Klaus Springer, Tyskland (DE)

USPTO: us-12653106 · published 2026-06-16 · patents · A01D 78/1014· A01B 73/044

Rotary tedder having a lifting unit

Klaus Springer, Tyskland (DE) This is my paper

Pith reviewed 2026-06-20 07:30 UTC · model grok-4.3

classification patents A01D 78/1014A01B 73/044

keywords rotary tedderlifting unitagricultural implementcommon axleadjustment assemblyheadland positionwheel supporttedder frame

0 comments

The pith

A lifting unit pivots a rotary tedder's wheel support and tedder frame around a common axle using a triangular adjustment assembly to reach working, headland, and transport positions.

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

The patent presents an agricultural implement consisting of a main frame, wheel support with main wheels, tedder frame with tines, and a lifting unit. The wheel support and tedder frame are distinct elements that each pivot on the same axle attached to the main frame. An adjustment assembly connects directly to the wheel support at one point and the tedder frame at another, with those points spanning the axle to create a triangle. A guide is also present on the tedder frame. This arrangement lets the lifting unit rotate both components around the axle to place the implement in any of three positions, including a specific intermediate spot between working and headland.

Core claim

The wheel support and the tedder frame are separate elements, each pivotable around a common axle on the main frame; the lifting unit comprises an adjustment assembly attached directly to the wheel support at a first attachment point and directly to the tedder frame at a second attachment point, the first and second attachment points spanning the common axle and forming a triangle therewith, plus a guide on the tedder frame, so that the lifting unit can pivot both elements around the axle to bring the implement into a predetermined position between the working position and the headland position, as well as into transport, working, and headland positions overall.

What carries the argument

The adjustment assembly attached directly to the wheel support and tedder frame at points spanning the common axle and forming a triangle with it, together with the guide on the tedder frame, which together drive the pivoting of the two separate elements.

If this is right

The implement reaches a transport position, a working position, and a headland position through the action of the single lifting unit.
The tedder frame and wheel support can be moved to a predetermined intermediate position between working and headland by pivoting around the common axle.
The triangular span of the adjustment assembly coordinates the motion of the two separate pivotable elements.
The guide on the tedder frame constrains and directs the path of the tedder frame during lifting.

Where Pith is reading between the lines

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

The shared-axle design may reduce the number of separate hydraulic or mechanical actuators needed compared with independent lift systems for wheels and frame.
The geometry could be examined for scaling to other towed implements that require synchronized height changes between support wheels and working tools.
Field trials measuring tine clearance during repeated headland transitions would test whether the intermediate position improves operational efficiency.

Load-bearing premise

The wheel support and tedder frame remain free to rotate independently around the shared axle when the adjustment assembly is actuated, without the triangular connection causing binding or structural failure.

What would settle it

A physical test in which the adjustment assembly is extended or retracted but the tedder frame and wheel support bind, collide, or stop short of the intended intermediate position between working and headland.

read the original abstract

1 . An agricultural implement, comprising: a main frame attachable to a towing vehicle, a wheel support supporting the main frame and having a plurality of main wheels; a tedder unit supported on a tedder frame, the tedder unit having a plurality of tines; and a lifting unit configured to bring the agricultural implement into each of a transport position, a working position, and a headland position; wherein the wheel support and the tedder frame are separate elements, each pivotable around a common axle on the main frame; wherein the lifting unit comprises an adjustment assembly, the adjustment assembly being attached directly to the wheel support at a first attachment point and directly to the tedder frame at a second attachment point, the first attachment point and the second attachment point span the common axle and form a triangle therewith; wherein the lifting unit further comprises a guide on the tedder frame; and wherein the lifting unit is configured to pivot the tedder frame and the wheel support around the common axle to bring the agricultural implement into a predetermined position between the working position and the headland position.

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 US patent on a mechanical lifting configuration for a rotary tedder, not a research paper, so standard scientific criteria for data or validation do not apply.

read the letter

This patent lays out a lifting unit for a rotary tedder where the wheel support and tedder frame are separate pieces that both pivot on one common axle on the main frame. An adjustment assembly connects directly to each, spans the axle to form a triangle, and works with a guide on the tedder frame to move the whole implement into transport, working, or headland positions, including a specific pivot between working and headland.

The arrangement itself is the claimed contribution. The geometry with the triangle and the shared axle is spelled out clearly enough in the abstract to show how the parts are supposed to interact and produce the desired positions.

The description gives a straightforward enabling account of the components and their connections. That is what a patent needs to do.

The lack of test data or load analysis is not a real flaw here. Patents stand on the written description, not on empirical results or error bars. The reader's low soundness score comes from applying research-paper standards that do not fit this document.

Without a prior-art search it is impossible to judge how distinct the triangle-and-guide setup actually is from earlier tedders, but the text does not claim broad novelty beyond the specific configuration.

This is for mechanical engineers or patent attorneys who work on agricultural implements. A reader looking for a concrete example of a pivoting lift mechanism in farm equipment could extract the geometry and think about how it might be built or modified.

It does not belong in academic peer review. Patents are examined by the patent office on their own terms.

Referee Report

0 major / 1 minor

Summary. The manuscript is a US patent describing an agricultural implement (rotary tedder) with a main frame, wheel support with main wheels, tedder frame supporting a tedder unit with tines, and a lifting unit. The lifting unit enables the implement to reach transport, working, and headland positions. The wheel support and tedder frame are separate elements each pivotable around a common axle on the main frame; the lifting unit includes an adjustment assembly attached directly to the wheel support and tedder frame at points spanning the axle to form a triangle, plus a guide on the tedder frame, configured to pivot both elements around the common axle to a predetermined position between working and headland.

Significance. If the described mechanical configuration operates without interference, it provides a compact lifting mechanism that coordinates pivoting of the wheel support and tedder frame via a single adjustment assembly forming a triangle with the common axle. This arrangement could simplify positioning of rotary tedders between operational states, potentially reducing the number of actuators or linkages needed compared to conventional designs. As a patent, its value rests on the enabling disclosure of the geometry rather than empirical validation or quantitative performance metrics.

minor comments (1)

The provided abstract begins with '1 .' which appears to be the numbering of claim 1; if this is the full abstract section, consider separating the claim language from any summary text for clarity in a journal context.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for their positive review of the patent and recommendation to accept.

Circularity Check

0 steps flagged

No circularity in mechanical patent description

full rationale

This is a US patent describing a mechanical agricultural implement with no equations, derivations, fitted parameters, predictions, or self-citations. The abstract and claims consist of direct structural descriptions of components (wheel support, tedder frame, common axle, adjustment assembly) and their functional relationships. No load-bearing step reduces to its own inputs by construction, and the disclosure is self-contained as an enabling mechanical specification without any theoretical or empirical chain that could exhibit circularity.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No free parameters, axioms, or invented entities apply, as this is a patent for a physical device rather than a scientific model or derivation.

pith-pipeline@v0.9.1-grok · 5724 in / 975 out tokens · 20614 ms · 2026-06-20T07:30:29.304273+00:00 · methodology

Rotary tedder having a lifting unit

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)