Advanced Mower Deck Lifting Device: Safety & Ergonomics

Publication ID: 24-11856886_0001_PTD

Published: October 26, 2025

Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Advanced Mower Deck Lifting Device: Safety & Ergonomics,” Published Technical Disclosure No. 24-11856886_0001_PTD, Published October 26, 2025, available at https://archive.pr1or.art/24-11856886_0001_PTD

This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,856,886.

Background and Problem Solved

The original patent (Cutting deck lifting device and mower having cutting deck lifting device) provided a basic lifting device for adjusting the height of a cutting deck. However, it lacked stability, safety features, and ergonomic considerations, leading to limitations in its practical application. The new invention addresses these limitations by introducing improved stability, safety features, and ergonomics to the cutting deck lifting device.

Novelty and Inventive Step

The new claims introduce several novel and non-obvious features, including the pedal body's lower center of gravity for enhanced stability, the self-locking mechanism for safety, and the motorized actuator for automated height adjustment. These features, combined with the ergonomic grip and adjustable bracket, provide a significant improvement over the original patent.

Alternative Embodiments and Variations

Alternative embodiments may include different pedal assembly designs, such as a telescoping pedal body or a pedal body with adjustable height settings. Variations may also include different types of motorized actuators, such as hydraulic or pneumatic systems, and different ergonomic grip designs to accommodate various operator preferences.

Potential Commercial Applications and Market

The enhanced cutting deck lifting device has significant commercial potential in the lawn care and landscaping industries, offering improved safety, efficiency, and ergonomics for mower operators. The invention can be integrated into various mower designs, providing a competitive advantage for manufacturers and enhancing the overall user experience.

CPC Classifications

Section	Class	Group
A	A01	A01D34/74
A	A01	A01D2101/00

Section 103 Obviousness Analysis (PHOSITA)

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Field of Art

Agricultural machinery design, specifically lawn mower cutting deck height adjustment mechanisms, requiring mechanical engineering expertise in mechanical linkages, ergonomic design, and safety mechanism implementation

Person of Ordinary Skill (PHOSITA) Profile

A mechanical engineer with expertise in agricultural equipment design, familiar with mechanical linkage systems, safety mechanisms, and human-machine interface design, typically holding a bachelor's degree in mechanical engineering with 3-5 years of experience in equipment design

Obviousness Rationale

A person having ordinary skill in the art would recognize that the PTD's variations represent predictable design modifications to the source patent's cutting deck lifting mechanism. The proposed changes involve standard engineering techniques for improving mechanical interfaces, safety features, and user interaction that would be apparent to a skilled practitioner seeking incremental improvements in mower deck adjustment systems.

Obvious Combinations & Variations

Source Patent Element

Pedal assembly with locking and unlocking states for cutting deck height adjustment

PTD Variation

Adding a lower center of gravity for pedal body and rotating shaft to enhance stability

Obviousness Reasoning

Optimizing mechanical component placement for improved stability is a routine design choice for a PHOSITA seeking to enhance user interaction and prevent unintended movement

Source Patent Element

Connecting assembly for adjusting cutting deck height

PTD Variation

Incorporating a self-locking mechanism with visual indicator to prevent accidental height changes

Obviousness Reasoning

Implementing additional safety features through mechanical interlocks and visual indicators is a predictable solution for improving user safety in mechanical systems

Source Patent Element

Manual pedal-based height adjustment mechanism

PTD Variation

Integrating a motorized actuator for automated height adjustment

Obviousness Reasoning

Replacing manual mechanical systems with powered actuation is a known engineering technique for improving user convenience and system precision

Source Patent Element

Basic pedal assembly design

PTD Variation

Ergonomic grip design and adjustable bracket to accommodate different operator preferences

Obviousness Reasoning

Customizing user interface components for improved comfort and adaptability is a standard approach in mechanical design to enhance user experience

Source Patent Element

Cutting deck lifting mechanism with mechanical linkages

PTD Variation

Alternative embodiments using telescoping pedal body and different actuator technologies

Obviousness Reasoning

Exploring alternative mechanical configurations using known engineering principles represents a predictable design evolution for a skilled practitioner

35 U.S.C. § 103 Summary: Pursuant to 35 U.S.C. § 103, the variations disclosed in this publication would have been obvious to a person having ordinary skill in the art at the time of invention, based on the teachings of US Patent 11856886. The proposed modifications represent routine engineering design choices that would be apparent to a skilled practitioner seeking incremental improvements in cutting deck lifting mechanisms, thereby rendering potential patent claims obvious and unpatentable.

Original Patent Information

Patent Number	US 11,856,886
Title	Cutting deck lifting device and mower having cutting deck lifting device
Assignee(s)	Globe (Jiangsu) Co., Ltd.