Independent and suspended spreader hood and distribution deflector

Cooper Linde, Lancaster, PA (US); Nathan E. Isaac, Lancaster, PA (US); Ziying Zhao, Harbin (CN)

USPTO: us-12622354 · published 2026-05-12 · patents · A01D 41/1243

Independent and suspended spreader hood and distribution deflector

Nathan E. Isaac, Lancaster, PA (US) , Cooper Linde, Lancaster, PA (US) , Ziying Zhao, Harbin (CN) This is my paper

Pith reviewed 2026-05-16 01:00 UTC · model grok-4.3

classification patents A01D 41/1243

keywords crop residue spreaderdistribution hoodpivot armsdistribution deflectorreplaceable nose capagricultural harvestercounter-rotating impellersresidue discharge gap

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The pith

A crop residue spreader uses independent pivot arms to suspend both frame and hood, preserving a fixed exit gap for discharged material.

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

The patent presents a spreader assembly in which counter-rotating impellers throw crop residue against a distribution hood that carries both a divider and a deflector. One or more pivot arms hold the spreader frame and the hood separately, so that a gap between them remains open for residue to leave the machine. The deflector includes a replaceable nose cap at its leading edge. Because the arms move independently, the geometry of the gap and the angle of deflection stay aligned even when the harvester changes attitude or the residue load varies. The arrangement therefore removes the need for constant manual repositioning of the hood during field operation.

Core claim

The spreader frame and the distribution hood comprising the divider form a gap enabling the discharging crop residue to exit the spreader, with the distribution deflector comprising a replaceable nose cap; both frame and hood are carried on the same set of independently pivoting support arms.

What carries the argument

Independently pivoting spreader arms that suspend the frame and the hood as separate rigid bodies, thereby fixing the width and alignment of the residue exit gap.

If this is right

Residue distribution remains uniform without operator intervention when the header rises or falls.
Wear on the deflector nose can be corrected by swapping only the cap rather than the entire hood assembly.
The same arm geometry can be used on both sides of the machine, simplifying parts inventory.
Clearance between hood and impellers stays fixed, reducing the chance of plugging at the discharge.

Where Pith is reading between the lines

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

The same independent-arm principle could be applied to other discharge components such as choppers or chaff spreaders that also require stable clearance under changing loads.
If the pivot arms incorporate simple stops or springs, the design may tolerate moderate frame flex without active sensors or actuators.
Field trials on side-hill operation would quickly show whether the passive gap maintenance is sufficient or whether a single adjustment link is still needed.

Load-bearing premise

Independent suspension via pivot arms will keep the gap width and deflector angle constant across changes in crop load, machine pitch, and part wear without any further adjustment.

What would settle it

Measure the physical gap width and the resulting residue spread pattern while the harvester operates on a slope with varying residue density; any systematic narrowing of the gap or drift in throw distance would contradict the claim.

read the original abstract

1 . A crop residue spreader of an agricultural harvester, comprising: a spreader frame; counter-rotating impellers mounted on the spreader frame that receives a crop residue from a crop threshing and/or cleaning system of the agricultural harvester and discharges the crop residue from the agricultural harvester; a distribution hood comprising a distribution deflector and a divider, the distribution hood being mounted in close proximity to the counter-rotating impellers in distributing a crop residue discharged by the counter-rotating impellers; and one or more spreader pivot arms independently supporting both the spreader frame and the distribution hood; wherein the spreader frame and the distribution hood comprising the divider, the divider facing the discharging crop residue, form a gap enabling the discharging crop residue to exit the spreader; and wherein the distribution deflector deflects the discharging crop residue and comprises a replaceable nose cap.

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

A utility patent on a combine spreader with independent pivot-arm suspension for frame and hood plus a replaceable nose cap; the geometry is described clearly but no performance data or field validation is given.

read the letter

The main thing here is a mechanical layout for a crop-residue spreader on a combine. The claims center on one or more pivot arms that carry both the spreader frame and the distribution hood independently, keeping a fixed gap between the hood divider and the counter-rotating impellers while the hood deflector carries a replaceable nose cap. That combination is presented as the novel feature over earlier fixed or singly suspended spreaders. The description is straightforward: the arms let the hood follow the frame motion without binding, the gap lets residue exit, and the nose cap can be swapped when it wears. Nothing in the text contradicts itself or relies on hidden parameters. The limitation is obvious and expected for this document type: there are no load cases, no wear measurements, no residue-distribution maps, and no comparison against a baseline spreader under the same crop conditions. Whether the independent suspension actually keeps the gap geometry stable across slope, load, and vibration is left as an engineering assumption. The patent is therefore useful as prior art for anyone designing or clearing new spreader hardware, but it does not supply evidence that would let a researcher cite it for performance gains. I would not bring it to a reading group, would not cite it in a methods or results section, and would not send it to peer review; it is a standard utility-patent filing that belongs in a patent search, not a journal queue.

Referee Report

0 major / 2 minor

Summary. The manuscript is a utility patent disclosing a crop residue spreader for agricultural harvesters. It claims a spreader frame supporting counter-rotating impellers, a distribution hood (with deflector and divider) mounted via one or more independent spreader pivot arms, a fixed gap formed between the frame and hood/divider for residue exit, and a replaceable nose cap on the distribution deflector.

Significance. If the described geometry and suspension are novel, the disclosure provides a concrete mechanical arrangement that separates frame and hood support, potentially simplifying residue flow control and component replacement in harvester spreaders. The patent contains no performance data, load analysis, or comparative results, so significance rests solely on the configuration itself.

minor comments (2)

Abstract line 1: the phrasing 'mounted in close proximity to the counter-rotating impellers in distributing a crop residue' is grammatically awkward and should be revised for clarity.
The description enumerates geometric relationships but does not specify pivot-arm kinematics or tolerance stack-up that would maintain the stated gap under dynamic conditions; a single clarifying sentence or figure annotation would remove ambiguity.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for the careful review and for recommending acceptance of the manuscript.

Circularity Check

0 steps flagged

No circularity: direct mechanical description only

full rationale

The patent discloses a crop residue spreader via enumerated physical parts (frame, impellers, hood, pivot arms, replaceable nose cap) and a fixed gap geometry. No equations, predictions, fitted parameters, derivations, or self-citations of theorems exist. All load-bearing statements are direct geometric or structural assertions, not reductions of outputs to inputs by construction. Score remains 0 per the rule that self-contained non-derivational disclosures receive the lowest circularity rating.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The design rests on standard mechanical engineering assumptions about rigid-body kinematics and material durability; no new physical constants, particles, or forces are postulated.

axioms (1)

domain assumption Rigid pivot arms maintain fixed relative geometry between frame and hood under normal operating loads
Implicit in the claim that the gap remains functional without active control.

pith-pipeline@v0.9.0 · 5474 in / 1103 out tokens · 28136 ms · 2026-05-16T01:00:30.096305+00:00 · methodology

Independent and suspended spreader hood and distribution deflector

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)