Removable rodent cage divider

Dee L Conger, Alpine, CA (US); Francesca McGuffie Pierce, San Diego, CA (US); Jose Javier Fuentes, Oceanside, CA (US)

USPTO: us-12622410 · published 2026-05-12 · patents · A01K 1/031· A01K 1/0005· A01K 1/035· A01K 1/10

Removable rodent cage divider

Francesca McGuffie Pierce, San Diego, CA (US) , Dee L Conger, Alpine, CA (US) , Jose Javier Fuentes, Oceanside, CA (US) This is my paper

Pith reviewed 2026-05-17 06:31 UTC · model grok-4.3

classification patents A01K 1/031A01K 1/0005A01K 1/035A01K 1/10

keywords rodent cageremovable dividersnap-fit connectionanimal housingcage accessorysupport structure

0 comments

The pith

A rodent cage divider snaps onto an overhead support bar using a spine that locks into a notch on the panel.

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

The patent describes an animal cage accessory that lets caretakers divide a single enclosure into separate compartments without permanent fixtures. A rigid support beam runs across the top of the cage and carries one or more slots plus a downward-facing spine. A vertical divider panel drops into the slot and then snaps upward so the spine seats inside a matching notch, holding the panel in place until the user pulls it free again. The arrangement aims to keep the divider steady under normal rodent movement while allowing repeated removal for cleaning or regrouping animals.

Core claim

The improvement consists of a support structure fixed to the top rims of two opposite cage walls, the structure containing a slot and a spine, together with a removable divider that carries a notch; when the divider is inserted through the slot the spine enters the notch to form a detachable snap-fit that secures the divider to the underside of the support.

What carries the argument

Spine-and-notch snap-fit connection that detachably locks the removable divider to the bottom of the overhead support structure.

If this is right

Cage floors and bedding can be changed without removing the entire divider assembly.
The same cage can be reconfigured into different numbers of compartments by adding or removing panels.
No tools or extra fasteners are required to install or uninstall the divider.

Where Pith is reading between the lines

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

The same spine-notch geometry could be adapted to other small-animal enclosures such as aquaria or reptile tanks.
Multiple parallel spines and notches would allow one support beam to hold several dividers at different spacings.

Load-bearing premise

The spine-and-notch geometry stays securely engaged under the forces and chewing typical of rodent cage use.

What would settle it

Repeated insertion and removal of the divider in a populated cage, followed by observation that the panel detaches or wobbles during normal animal activity.

read the original abstract

1 . An improvement for an animal cage comprising: a support structure spanning over a floor of the animal cage and connected to a top rim of each of first and second vertical walls of the animal cage, the support structure comprising at least one slot and a spine; a removable divider configured to be inserted into the at least one slot and comprising a notch, the removable divider extending vertically away from the floor; and a snap-fit connection disposed on the removable divider and detachably connecting the removable divider to a bottom of the support structure, wherein the snap-fit connection comprises having the spine inserted into the notch.

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 narrow utility patent on a snap-fit spine-and-notch cage divider that solves a small lab-housing nuisance without new science or data.

read the letter

This filing describes a removable divider for rodent cages that hangs from an overhead support bar. The bar has a slot and a downward spine; the divider has a matching notch so it snaps into place and stays put until you pull it out. That geometry is the entire claimed improvement. It is a concrete mechanical arrangement, internally consistent, and easy to visualize from the abstract alone. If the snap holds under normal cage-washing and animal activity, it could save a few seconds per cage change and reduce the chance of a divider tipping. That is the useful part. No performance numbers, no material specs, no side-by-side tests against existing commercial dividers appear in the text. The prior-art discussion is absent, so it is impossible to judge whether the spine-into-notch detail is actually new or just a minor variant of slotted partitions already sold by several lab-supply companies. Because the document is only a claim plus abstract, there is also no evidence on long-term durability, chew resistance, or ease of one-handed operation. The work is therefore a design specification rather than a tested result. It will interest cage manufacturers and animal-facility managers who need to partition litters or separate animals temporarily. It will not interest researchers looking for behavioral or physiological data, nor will it change how anyone designs an experiment. For journal peer review the answer is no; the piece lacks the empirical or theoretical substance that referees expect. For patent examination the usual prior-art search will decide its fate. I would not bring it to a reading group or cite it in a methods paper.

Referee Report

1 major / 0 minor

Summary. The manuscript is a concise utility-patent claim describing an improvement to an animal cage. It comprises a support structure that spans the cage floor, attaches to the top rims of two vertical walls, and includes at least one slot plus a downward-projecting spine; a removable vertical divider that inserts into the slot and carries a notch; and a snap-fit connection formed by inserting the spine into the notch, thereby detachably securing the divider to the underside of the support structure.

Significance. If the notch-and-spine geometry indeed produces a stable, tool-free, repeatable attachment under typical rodent-cage handling and animal activity, the design could simplify reconfiguration of cage compartments in laboratory or vivarium settings without requiring separate fasteners or permanent modifications.

major comments (1)

Claim 1: the description of the snap-fit connection is limited to the geometric statement 'spine inserted into the notch.' No dimensions, material properties, or tolerances are supplied; this leaves open whether the connection remains secure under the loads and repeated insertions expected in normal use, which is central to the utility asserted by the claim.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the careful reading and for highlighting the functional requirements of the snap-fit connection. Our response addresses the single major comment directly.

read point-by-point responses

Referee: Claim 1: the description of the snap-fit connection is limited to the geometric statement 'spine inserted into the notch.' No dimensions, material properties, or tolerances are supplied; this leaves open whether the connection remains secure under the loads and repeated insertions expected in normal use, which is central to the utility asserted by the claim.

Authors: We respectfully note that Claim 1 is an independent claim whose purpose is to define the minimal structural combination that enables tool-free, repeatable attachment. The phrase 'snap-fit connection' is a term of art in mechanical design that inherently connotes an interference or resilient engagement between the spine and notch sufficient to resist typical handling and animal loads. Specific dimensions, material properties, and tolerances are implementation details that support enablement but properly reside in the accompanying drawings, the detailed description, or dependent claims rather than in the broadest independent claim. The geometry recited (spine projecting downward from the support into a notch on the divider) is sufficient to distinguish the invention from prior art while preserving claim breadth. revision: no

Circularity Check

0 steps flagged

No significant circularity

full rationale

The document is a concise utility-patent claim for a mechanical snap-fit cage divider. It advances no equations, fitted parameters, quantitative predictions, or self-citations. The single claim simply enumerates geometric features (spine-into-notch) whose description is self-contained and does not reduce to any prior input by construction.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The design rests on standard mechanical assumptions (rigid plastics, snap-fit tolerances) already known in injection-molding practice; no new entities or free parameters are introduced.

axioms (1)

domain assumption Snap-fit features molded from common cage plastics will retain sufficient elasticity and durability under repeated insertion cycles.
Implicit in any plastic snap-fit claim; not proven in the abstract.

pith-pipeline@v0.9.0 · 5442 in / 1016 out tokens · 29069 ms · 2026-05-17T06:31:51.641038+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/AbsoluteFloorClosure.lean reality_from_one_distinction unclear

?

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

a snap-fit connection ... wherein the snap-fit connection comprises having the spine inserted into the notch

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.