Retractable, detachable and portable pet stroller

Xingguo Cheng, Hanchuan City (CN)

USPTO: us-12622408 · published 2026-05-12 · patents · A01K 1/0245

Retractable, detachable and portable pet stroller

Xingguo Cheng, Hanchuan City (CN) This is my paper

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

classification patents A01K 1/0245

keywords pet strollerretractable strollerdetachable basketlocking mechanismfolding roofportable pet carrier

0 comments

The pith

A pet stroller detaches its basket from the frame and collapses flat through three spring-loaded locking systems.

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

The patent describes a pet stroller whose basket separates from the wheeled body via a first locking mechanism built from a housing, two hooks, a push plate, and a return spring. A folding roof attaches to the basket with a second lock and is secured at its movable end by a third lock. The basket itself uses rotating connecting rods between top and bottom frames so the whole assembly can retract when the locks are released. If the mechanisms work as stated, owners could carry or store the stroller more easily than with fixed-frame designs. The central engineering effort lies in making detachment and folding reversible and repeatable without tools.

Core claim

The stroller body is detachably connected to the stroller basket by a first locking mechanism comprising a housing, first hook, second hook, push plate and first return spring; the folding roof is detachably connected to the basket by a second locking mechanism and held in place at its movable end by a third locking mechanism; the basket consists of a bottom frame, top frame and plural folding connecting rods that rotate to allow retraction.

What carries the argument

Three locking mechanisms (first: housing with push plate and dual hooks plus return spring; second and third: roof attachment locks) that enable detachment of the basket and collapse of the folding roof and rods.

If this is right

The basket can be removed from the wheeled frame for separate cleaning or transport.
The roof and frame rods can be folded flat once the second and third locks are opened.
No separate tools are required to convert the stroller between assembled and portable states.
The design separates the load-bearing basket structure from the mobility components.

Where Pith is reading between the lines

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

Owners who travel with pets might keep only the basket in a car and attach it to different wheeled bases at destination.
Similar rod-and-lock arrangements could be adapted to infant strollers or collapsible shopping carts where quick separation of the container is desired.
Testing would need to confirm that the spring forces remain consistent after exposure to outdoor dust and moisture.

Load-bearing premise

The locking mechanisms will engage and disengage reliably under repeated use and the weight of a pet without accidental release or mechanical failure.

What would settle it

Build the described stroller and perform 500 cycles of attachment, loading with typical pet weight, detachment, and folding; record any instance in which a lock fails to hold or releases unintentionally.

read the original abstract

1 . A retractable, detachable and portable pet stroller, comprising a stroller body, a stroller basket and a folding roof, wherein the stroller body is detachably connected with the stroller basket, a first locking mechanism for fixation is provided at a bottom of the stroller basket, the folding roof is detachably connected with the stroller basket, a second locking mechanism for fixation is provided on the folding roof, and a third locking mechanism for fixing a movable end of the folding roof is further provided at a top of the stroller basket; wherein the stroller basket comprises a bottom frame, a top frame and a plurality of folding connecting rods, one end of each of the plural folding connecting rods is rotatably connected with the bottom frame, the other end of each of the plural folding connecting rods is rotatably connected with the top frame; wherein the first locking mechanism comprises a housing, a first hook, a second hook, a push plate and a first return spring, the housing is provided on one side of a bottom of the bottom frame, a first accommodating cavity and a first through hole are provided in the housing, the push plate and the first return spring are located in the first accommodating cavity, the push plate is slidably connected with an inner wall of the housing, one end of the first return spring is fixedly connected with the inner wall of the housing, the other end of the first return spring is fixedly connected with the push plate, the first hook penetrates through the first through hole to be connected with the push plate, and the second hook is provided at the bottom of the bottom frame.

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 mechanical patent that spells out one workable way to make a pet stroller basket detach and the roof fold, using three spring-loaded hook assemblies; nothing more.

read the letter

The core of this filing is a parts-level description of a stroller whose basket locks to the frame with a pair of hooks driven by a push plate and return spring, while the folding roof uses two more similar latches. The text gives clear geometry for the housing, through-holes, and rod connections, so a fabricator could build the mechanism from the drawings alone. That level of specificity is the only real addition over earlier pet-stroller patents; the rest is routine folding-frame language. No load ratings, spring constants, tolerance stack, or cycle counts appear anywhere, which is normal for a patent but leaves the reliability claim untested. The weakest point is therefore the implicit assertion that the hooks will stay engaged under a shifting dog and road bumps; the document supplies kinematics, not evidence. Readers who need prior-art examples for pet-product design or who are drafting their own claims will find the figures and claim language directly usable. Everyone else can skip it. I would not send this to a technical referee; it is already in the form a patent examiner expects.

Referee Report

1 major / 1 minor

Summary. The manuscript describes a retractable, detachable and portable pet stroller comprising a stroller body detachably connected to a stroller basket via a first locking mechanism (housing, first hook, second hook, push plate, first return spring) and a folding roof secured to the basket by second and third locking mechanisms. The basket includes a bottom frame, top frame, and folding connecting rods; the abstract and mechanism descriptions supply a parts list and kinematic interactions intended to enable repeated attachment, detachment, and folding.

Significance. If the described mechanisms operate as specified, the design supplies a concrete, mechanically detailed solution for portable pet transport that combines detachability with a retractable roof. The explicit enumeration of components and their interconnections (e.g., through-hole geometry, return-spring placement) constitutes an enabling disclosure that could support patent claims.

major comments (1)

[Abstract; first locking mechanism paragraph] Abstract and first-locking-mechanism description: the central functionality claim—that the first, second, and third locking mechanisms will reliably engage, disengage, and hold under pet weight and repeated cycles without accidental release—rests solely on a kinematic parts list. No force balance, spring-constant specification, hook-engagement angle, tolerance analysis, or material properties are provided to confirm that the return spring and hook geometry maintain latch integrity under typical dynamic loads.

minor comments (1)

Figure references and part-number consistency should be checked against the textual description of the housing, push plate, and through holes.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the detailed reading and for identifying the distinction between kinematic description and quantitative load analysis. Our response addresses the single major comment directly.

read point-by-point responses

Referee: [Abstract; first locking mechanism paragraph] Abstract and first-locking-mechanism description: the central functionality claim—that the first, second, and third locking mechanisms will reliably engage, disengage, and hold under pet weight and repeated cycles without accidental release—rests solely on a kinematic parts list. No force balance, spring-constant specification, hook-engagement angle, tolerance analysis, or material properties are provided to confirm that the return spring and hook geometry maintain latch integrity under typical dynamic loads.

Authors: The document is a patent specification whose claims are directed to a novel structural arrangement of frames, rods, and three distinct locking assemblies. The enabling disclosure is the explicit geometry and interconnection of the housing, hooks, push plate, through-holes, and return spring, which together define a repeatable kinematic sequence for engagement and release. Patent practice does not require spring-rate values, force balances, or tolerance stacks unless those parameters themselves constitute the claimed invention. A person skilled in the art can select appropriate springs, materials, and engagement angles for a given pet-weight range using standard engineering methods; such choices constitute routine optimization rather than additional inventive subject matter. revision: no

Circularity Check

0 steps flagged

No derivation chain or predictions; pure mechanical specification

full rationale

The document is a patent that directly specifies components, geometry, and kinematic connections of a pet stroller (housing, hooks, springs, frames, rods). It contains no equations, fitted parameters, model predictions, self-citations, or ansatzes that could reduce to their own inputs. The central claim is a parts-list description of locking mechanisms; no step asserts that a derived quantity equals an input quantity by construction. Hence the circularity score is zero.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No free parameters, axioms, or invented physical entities; the document specifies concrete mechanical components and their interconnections.

pith-pipeline@v0.9.0 · 5607 in / 949 out tokens · 19491 ms · 2026-05-17T05:31:34.503728+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.

first locking mechanism comprises a housing, a first hook, a second hook, a push plate and a first return spring

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.