Electric riding lawn mower

Fangjie Nie, Nanjing (CN); Qian Liu, Nanjing (CN); Toshinari Yamaoka, Nanjing (CN); Zhen Wang, Nanjing (CN)

USPTO: us-12642181 · published 2026-06-02 · patents · A01D 69/02· A01D 34/64· A01D 34/78· A01D 2101/00

Electric riding lawn mower

Qian Liu, Nanjing (CN) , Toshinari Yamaoka, Nanjing (CN) , Zhen Wang, Nanjing (CN) , Fangjie Nie, Nanjing (CN) This is my paper

Pith reviewed 2026-06-03 12:31 UTC · model grok-4.3

classification patents A01D 69/02A01D 34/64A01D 34/78A01D 2101/00

keywords electric lawn mowerbattery pack arrangementremovable batteriesriding mowerpower supply layout

0 comments

The pith

An electric riding mower uses six removable battery packs arranged in a 3-by-2 grid to supply both the cutting and traction motors.

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

The patent describes an electric riding lawn mower whose power supply consists of six identical, user-removable battery packs. These packs sit in a fixed three-row, two-column layout on the main frame and can be taken off to run other garden tools. The arrangement is presented as the means by which the mower obtains adequate voltage and runtime for simultaneous mowing and travel. A sympathetic reader would conclude that the specific physical layout solves the problem of integrating multiple portable packs into a ride-on platform while preserving interchangeability.

Core claim

The six battery packs are arranged in three rows and two columns, each one of the three rows has two ones of the six battery packs, and each one of the two columns has three ones of the six battery packs.

What carries the argument

The 3-by-2 physical grid of six removable battery packs that simultaneously powers the mowing motor and the traction motor while allowing each pack to be detached for use in other tools.

Load-bearing premise

The chosen 3-by-2 physical arrangement supplies enough voltage, current, and runtime for both motors under ordinary mowing loads.

What would settle it

A test showing that the 3-by-2 pack layout cannot maintain rated motor speed or runtime when the mower cuts thick grass on a slope while carrying an operator.

read the original abstract

1 . An electric riding lawn mower, comprising: a seat for a user to sit; a main frame configured to support the seat; a power output assembly comprising a mowing element for outputting power to realize a mowing function and a first motor for driving the mowing element to output power; a walking assembly configured to at least drive the electric riding lawn mower to travel on a surface and comprising a second motor, wherein the walking assembly further comprises a first travelling wheel rotatable about a first axis and a second travelling wheel rotatable about a second axis; and a power supply device comprising six battery packs for powering the first motor or the second motor of the electric riding lawn mower; wherein each of the six battery packs comprises: a battery pack housing; and battery cells disposed in the battery pack housing, wherein the six battery packs are removable relative to the main frame and capable of powering another garden tool when the six battery packs are removed from the main frame, the six battery packs are arranged in three rows and two columns, each one of the three rows has two ones of the six battery packs, and each one of the two columns has three ones of the six battery packs.

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 utility patent on a 3x2 removable battery layout for an electric riding mower; nothing more.

read the letter

The document is a standard US utility patent whose single independent claim covers an electric riding mower with six removable battery packs arranged in three rows and two columns. The packs power separate mowing and traction motors and can be swapped to other garden tools. That configuration and the removability feature are the only elements presented as novel. The rest of the text is routine description of frame, seat, wheels, and motors already common in the category. No performance numbers, thermal data, voltage calculations, or runtime measurements appear, which is normal for this kind of filing. The arrangement itself reduces to ordinary mechanical packaging; similar 3x2 or 2x3 clusters already exist in cordless tool ecosystems. The patent therefore adds a narrow, enforceable design point rather than any new engineering principle or empirical result. It will matter to mower manufacturers checking prior art and to anyone licensing the specific layout, but it contains no material a research group would discuss or cite. A serious editor would desk-reject it for peer review without hesitation.

Referee Report

0 major / 2 minor

Summary. The manuscript is a utility patent claiming an electric riding lawn mower comprising a seat, main frame, mowing assembly driven by a first motor, walking assembly driven by a second motor with two travelling wheels, and a power supply consisting of exactly six removable battery packs arranged in three rows and two columns (each row containing two packs and each column containing three packs). The packs are stated to power either motor and to be interchangeable with other garden tools once removed.

Significance. If the geometric layout is novel and non-obvious, the disclosure provides a concrete, reproducible mechanical arrangement that enables battery interchangeability between the mower and other tools without requiring performance data, thermal analysis, or electrical integration details for validity as a utility patent claim.

minor comments (2)

[Claim 1] Claim 1 contains redundant and awkward phrasing: 'each one of the three rows has two ones of the six battery packs, and each one of the two columns has three ones of the six battery packs.' This can be simplified to a direct statement of the 3-by-2 rectangular array without loss of meaning.
[Abstract and Claim 1] The abstract and claim repeat the full component list; a shorter characterizing clause focused on the battery arrangement would improve readability.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for the careful reading and the recommendation to accept.

Circularity Check

0 steps flagged

No circularity: patent discloses mechanical layout with no derivations or fitted parameters

full rationale

The document is a utility patent whose sole load-bearing content is a structural claim describing the physical placement of six removable battery packs in a 3×2 array. No equations, predictions, parameter fits, uniqueness theorems, or ansatzes appear anywhere in the text. Consequently no step reduces to its own inputs by construction, and the circularity score is zero.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No free parameters, mathematical axioms, or postulated entities are present; the document is an engineering design specification.

pith-pipeline@v0.9.0 · 5778 in / 836 out tokens · 29613 ms · 2026-06-03T12:31:42.157569+00:00 · methodology

Electric riding lawn mower

Core claim

What carries the argument

Load-bearing premise

What would settle it

discussion (0)