Hitching assembly

Jacob D. Kappelman, Bloomfield, IA (US)

USPTO: us-12667034 · published 2026-06-30 · patents · A01B 59/043

Hitching assembly

Jacob D. Kappelman, Bloomfield, IA (US) This is my paper

Pith reviewed 2026-06-30 18:00 UTC · model grok-4.3

classification patents A01B 59/043

keywords hitching assemblysingle point assemblytwo-point assemblysupport passagedegrees of freedomrigid assemblyhitch adjustmentvehicle hitch

0 comments

The pith

A hitching assembly combines single-point and two-point attachments that can lock rigid or allow multi-degree movement within a support passage.

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

The paper presents a hitching assembly designed to couple to a vehicle's hitch. It includes a single point assembly with an attachment area and a support passage, plus a two-point assembly whose support member passes through that passage. When raised, the two assemblies form a rigid unit; when lowered, the two-point part can shift vertically and rotate within the passage while staying constrained laterally. This setup lets users adjust the hitch position for different needs without losing guidance from the passage. Such a design would interest anyone towing trailers or equipment who needs both secure and adjustable connections.

Core claim

The hitching assembly comprises a single point assembly including a first attachment area and a support portion having a support passage, and a two-point assembly including a support member extending through the support passage. The two-point assembly is movable from a raised position where it forms a rigid assembly with the single point assembly to a lowered position where the support member moves vertically within the support passage and among a plurality of degrees of freedom while being constrained by the support passage for adjusting the position of the two-point assembly relative to the hitch assembly.

What carries the argument

The support passage through which the support member of the two-point assembly extends, enabling the transition from rigid coupling to constrained multi-degree-of-freedom movement.

Load-bearing premise

The support passage will constrain lateral movement while permitting vertical and angular motion without the components binding or wearing excessively under normal loads.

What would settle it

Load-testing the lowered assembly to determine if the support member can achieve the claimed degrees of freedom without jamming or allowing excessive side-to-side play.

read the original abstract

1 . A hitching assembly for coupling to a hitch assembly on a vehicle, the hitching assembly comprising: a single point assembly including a first attachment area for attaching to the hitch assembly and a support portion having a support passage extending therethrough; and a two-point assembly including a support member extending through the support passage, the two-point assembly having second and third attachment areas for attaching to the hitch assembly, wherein the two-point assembly is movable from a raised position where the two-point assembly is coupled to the single point assembly to form a rigid assembly, to a lowered position where the two-point assembly is decoupled from the single point assembly to move the support member vertically within the support passage of the support portion from the raised position to the lowered position and among a plurality of degrees of freedom within the support passage while being constrained by the support passage for adjusting a position of the two-point assembly relative to the hitch assembly.

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 describing a hitch with a movable two-point assembly in a support passage, but it provides only a structural claim with no data or comparisons.

read the letter

This patent claims a hitching assembly that uses a single-point support with a passage and a two-point assembly that shifts from rigid raised position to a lowered state with vertical and angular movement still constrained by the passage. The arrangement aims to give more adjustability when coupling to a vehicle hitch.

The description is straightforward on the geometry and motion. It spells out how the support member moves within the passage while staying limited in other directions. That specific combination of single-point and constrained two-point motion is the core idea presented.

The text stops at the claim. There are no dimensions, materials, load tests, or drawings to show whether the passage actually prevents binding or excessive play under typical towing forces. No prior hitch designs are referenced, so it is impossible to judge how much this improves on existing adjustable hitches. The central assumption that the geometry will hold up in practice is left unexamined.

This document is written for patent examiners and equipment designers in agriculture or towing. It does not contain results, derivations, or comparisons that would interest a research group or appear in a technical paper. I would not bring it to a reading group or cite it.

It does not belong in peer review for a journal. The patent system is the right place for this kind of mechanical claim.

Referee Report

1 major / 1 minor

Summary. The manuscript describes a hitching assembly for coupling to a vehicle hitch assembly, consisting of a single-point assembly with a first attachment area and a support portion containing a support passage, together with a two-point assembly whose support member passes through that passage; the two-point assembly can move from a raised position forming a rigid assembly to a lowered position permitting vertical motion and multiple degrees of freedom while remaining constrained by the passage.

Significance. If the described geometry can be realized without binding or structural failure, the assembly would supply a mechanically simple means of switching between rigid and articulated hitch modes, potentially useful for applications requiring positional adjustment. The absence of any performance data, load analysis, material specifications, or prototype results prevents any quantitative assessment of practical significance or advantage over existing designs.

major comments (1)

[Claim 1] Claim 1 (the sole technical section): the central assertion that the support passage reliably constrains lateral motion while permitting the stated vertical and angular degrees of freedom rests on an unexamined geometric assumption; no dimensions, clearances, or force analysis are supplied to substantiate that the mechanism will operate without binding or excessive wear under typical loads.

minor comments (1)

The text is drafted in legal claim language; for journal publication it would require conversion to standard technical prose with explicit definitions of all components and motion constraints.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for their review of our patent application describing the hitching assembly. We respond point-by-point to the major comment on Claim 1.

read point-by-point responses

Referee: Claim 1 (the sole technical section): the central assertion that the support passage reliably constrains lateral motion while permitting the stated vertical and angular degrees of freedom rests on an unexamined geometric assumption; no dimensions, clearances, or force analysis are supplied to substantiate that the mechanism will operate without binding or excessive wear under typical loads.

Authors: We agree that Claim 1 contains no specific dimensions, clearances, or force analysis. As a patent claim, its purpose is to define the novel structural combination and functional relationship in broad terms that cover the inventive concept. The claim explicitly states that the support member moves vertically within the support passage while remaining constrained by it, thereby permitting the described degrees of freedom. The geometry is defined such that the passage provides lateral constraint consistent with the permitted motions; whether a particular realization binds or wears is an implementation detail outside the scope of the claim language itself. revision: no

Circularity Check

0 steps flagged

No circularity; patent is structural claim without derivations

full rationale

The document is a US patent claim describing a mechanical hitching assembly. It contains no equations, derivations, fitted parameters, predictions, or self-citations. The central text is a direct structural description of components and their degrees of freedom, with no load-bearing technical premise or derivation chain that could reduce to its own inputs by construction. The result is self-contained as an existence assertion about a device design.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No mathematical axioms, free parameters, or invented physical entities are present; the claim rests on standard mechanical engineering assumptions about rigid bodies, sliding contacts, and load-bearing passages.

pith-pipeline@v0.9.1-grok · 5680 in / 1139 out tokens · 38242 ms · 2026-06-30T18:00:50.385164+00:00 · methodology

discussion (0)

Lean theorems connected to this paper

Citations machine-checked in the Pith Canon. Every link opens the source theorem in the public Lean library.

IndisputableMonolith/Foundation/RealityFromDistinction.lean reality_from_one_distinction unclear

?

unclear
Relation between the paper passage and the cited Recognition theorem.

A hitching assembly... support member extending through the support passage, the two-point assembly having second and third attachment areas... movable from a raised position... to a lowered position... among a plurality of degrees of freedom within the support passage while being constrained by the support passage
IndisputableMonolith/Foundation/Cost/FunctionalEquation.lean washburn_uniqueness_aczel unclear

?

unclear
Relation between the paper passage and the cited Recognition theorem.

the two-point assembly is movable from a raised position where the two-point assembly is coupled to the single point assembly to form a rigid assembly, to a lowered position where the two-point assembly is decoupled from the single point assembly

What do these tags mean?

matches: The paper's claim is directly supported by a theorem in the formal canon.
supports: The theorem supports part of the paper's argument, but the paper may add assumptions or extra steps.
extends: The paper goes beyond the formal theorem; the theorem is a base layer rather than the whole result.
uses: The paper appears to rely on the theorem as machinery.
contradicts: The paper's claim conflicts with a theorem or certificate in the canon.
unclear: Pith found a possible connection, but the passage is too broad, indirect, or ambiguous to say the theorem truly supports the claim.