Livestock brush

Hardeep Kaur Riat, San Marcos, CA (US)

USPTO: us-12628796 · published 2026-05-19 · patents · A01K 13/004· A46B 5/0058· A46B 5/007· A46B 7/10· A46B 9/026· A46B 17/02· A46B 2200/1093

Livestock brush

Hardeep Kaur Riat, San Marcos, CA (US) This is my paper

Pith reviewed 2026-05-21 22:32 UTC · model grok-4.3

classification patents A01K 13/004A46B 5/0058A46B 5/007A46B 7/10A46B 9/026A46B 17/02A46B 2200/1093

keywords livestock brushspring mechanismcam deviceanimal groomingmechanical returnforce threshold

0 comments

The pith

A livestock brush uses two cam-spring pairs to resist excessive force and return the head to rest after normal contact.

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

The patent describes a brush mounted on two hinges and driven by a pair of springs, each paired with its own rotating and non-rotating cam. Normal pressure from an animal compresses one cam pair while the second pair restores the brush; force above a threshold reverses the roles so the brush yields rather than pushes back. The design therefore supplies both a defined scratching resistance and an automatic return to the starting position without external power. A sympathetic reader sees this as a way to give animals a reliable grooming station that survives rough or repeated use.

Core claim

The central claim is that the combination of two springs, each actuated by its dedicated cam pair on a shared axle, produces both a controlled resistance during normal brushing and a restoring force after excessive displacement, all without jamming or requiring adjustment.

What carries the argument

Dual cam-spring pairs in which a non-rotating cam and a rotating cam on the same axle compress or release their spring according to whether brush movement stays below or exceeds a force threshold.

If this is right

The brush can be left unattended in a barn or pasture without motors or sensors.
Contact force stays within a narrow band set by the springs, reducing risk of injury to the animal.
Restoring action keeps the bristles oriented for the next animal without manual repositioning.

Where Pith is reading between the lines

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

The same cam-spring geometry might be adapted to other pivoting farm fixtures such as gates or feeders that must yield and reset.
Threshold force could be changed by swapping springs or altering cam lobe shape, offering a simple way to tune the device for different livestock species.

Load-bearing premise

The cam-spring pairs will keep distinguishing normal from excessive force and will not jam, wear, or drift after repeated contact with moving animals.

What would settle it

Mount the brush in a pen and record whether the head returns to center within a fixed angle after each of several hundred animal contacts that vary in force and direction.

read the original abstract

1 . A livestock brush apparatus for tending to livestock comprising: a brush device ( 102 ), mechanically actuated and controlled by a spring mechanism ( 104 ), incorporating a bristle section ( 106 ) intended for applying pressure against an animal's body for a scratch; characterized in that the spring mechanism ( 104 ) includes at least a set of two springs ( 120 , 122 ) exerting a defined resistance on the brush device ( 102 ) for controlling the movement of the brush device ( 102 ) with bristles; wherein each spring is associated with a unique cam device, each cam device configured to actuate its respective spring, wherein each cam device includes at least one non-rotating cam ( 14 ) mounted on an axle ( 16 ) and one rotating cam ( 15 ) rotating on the axle ( 16 ) to compress or decompress its respective spring in the spring mechanism ( 104 ), depending on excessive or normal movement, respectively, of the brush device ( 102 ), wherein excessive movement is defined as an external force exerted on the brush device that exceeds a threshold value and normal movement is defined as an external force exerted on the brush device that does not exceed the threshold value; characterized in that the brush device ( 102 ) is securely attached to the spring mechanism ( 104 ) via two hinge joints ( 110 ) connecting the set of two springs ( 120 , 122 ); wherein, by employing the set of two springs and the respective cam device for each spring, the spring mechanism ( 104 ) exerts a defined resistance on the brush device ( 102 ) for its controlled movement of the brush device ( 102 ) during its operation, while also exerts a controlled restoring force to bring the brush device ( 102 ) back to its resting position; wherein, owing to the combined operation of the cam devices and the tw

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 standard utility patent on a dual-cam, dual-spring hinge for a livestock brush; the mechanism is described functionally but adds no new measurements or tested performance data.

read the letter

The filing describes a brush mounted on two hinges, each paired with its own cam and spring. Normal pressure lets the rotating cam compress the spring in a controlled way; force above some threshold makes the non-rotating cam take over and increase resistance, then the springs return the brush to rest. That arrangement is the claimed novelty. It is a concrete mechanical layout that could be drawn and built from the text alone. The description is self-contained and avoids any equations or fitted constants, which keeps the disclosure simple. No prototype results, force curves, or wear data appear, so the practical advantage over existing spring-loaded brushes remains an assertion rather than a demonstrated improvement. The cam profiles and threshold values are left unspecified, which is normal for a patent but limits any engineering reader who wants to judge durability under farm conditions. The work sits squarely in the domain of agricultural equipment design. A mechanical engineer or product developer working on animal-handling tools might find the hinge-and-cam detail useful as one more prior-art reference. It does not contain a scientific result or a reproducible measurement, so it would not normally be sent for peer review in a research journal. If the question is whether to examine the claims for infringement or licensing purposes, the document is worth reading once; otherwise it can be filed with other routine patents.

Referee Report

0 major / 2 minor

Summary. The manuscript discloses a livestock brush apparatus comprising a brush device actuated via a spring mechanism that incorporates two springs, each paired with a dedicated cam device (one non-rotating cam and one rotating cam mounted on a shared axle). The cams compress or decompress their respective springs according to whether an external force on the brush exceeds a defined threshold, thereby supplying controlled resistance during normal use and a restoring force that returns the brush to its resting position; attachment occurs through two hinge joints.

Significance. If the cam-spring pairs function as described, the design offers a mechanically simple, threshold-responsive grooming device that could reduce equipment damage and improve animal welfare in commercial livestock settings without requiring electronic controls or sensors.

minor comments (2)

The abstract sentence beginning 'owing to the combined operation of the cam devices and the tw' is truncated and should be completed.
Claim 1 and the abstract repeat the functional description of resistance and restoring force; a single concise statement would improve readability.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for the positive evaluation and recommendation to accept the manuscript on the livestock brush apparatus.

Circularity Check

0 steps flagged

No significant circularity

full rationale

The patent is a mechanical invention disclosure describing a cam-spring arrangement for a livestock brush. No equations, fitted parameters, predictions, or derivation chain exist in the text; the central claim is the existence and operability of the described hardware itself. The disclosure is therefore self-contained by construction and contains no load-bearing step that reduces to its own inputs or to a self-citation.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The invention rests on standard mechanical assumptions (springs obey Hooke's law, cams transmit force without binding) plus the untested premise that the defined threshold will be useful for livestock.

axioms (1)

domain assumption Cam pairs can be shaped to produce a sharp resistance transition at a chosen force threshold.
Implicit in claim language describing normal vs. excessive movement.

pith-pipeline@v0.9.0 · 5927 in / 1086 out tokens · 24853 ms · 2026-05-21T22:32:26.858069+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/Cost/FunctionalEquation.lean washburn_uniqueness_aczel unclear

?

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

each cam device includes at least one non-rotating cam (14) mounted on an axle (16) and one rotating cam (15) rotating on the axle (16) to compress or decompress its respective spring... depending on excessive or normal movement
IndisputableMonolith/Foundation/HierarchyEmergence.lean hierarchy_emergence_forces_phi unclear

?

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

the spring mechanism (104) exerts a defined resistance on the brush device (102) for its controlled movement... while also exerts a controlled restoring force
IndisputableMonolith/Foundation/RealityFromDistinction.lean reality_from_one_distinction unclear

?

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

A livestock brush apparatus for tending to livestock comprising: a brush device (102), mechanically actuated and controlled by a spring mechanism (104)

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.