Adaptable Four-Wheel Steering Technology for Diverse Industries

Publication ID: 24-11857485_0007_PTD
Published: October 28, 2025
Category:New Applications & Use Cases

Legal Citation

pr1or.art Inc., “Adaptable Four-Wheel Steering Technology for Diverse Industries,” Published Technical Disclosure No. 24-11857485_0007_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857485_0007_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. 11,857,485.

Summary of the Inventive Concept

The present inventive concept discloses the application of four-wheel steering technology, originally developed for knee walkers, to various industries and use cases, including agriculture, search and rescue, golf, amphibious vessels, and commercial landscaping.

Background and Problem Solved

The original knee walker patent, while providing improved maneuverability and stability, was limited to its specific application. However, the core technology of four-wheel steering has the potential to revolutionize other fields where precision, control, and adaptability are crucial. The present inventive concept addresses the need for adaptable, high-performance steering systems in diverse industries.

Detailed Description of the Inventive Concept

The adaptable four-wheel steering technology comprises a modular system, allowing for easy integration into various platforms and devices. The system features a central steering column, connected to a first end of a center crossbar, and a rear crossbar connected to a second end of the center crossbar. The first and second linkage mechanisms, such as tie-rods or cables, facilitate smooth and precise steering. The inventive concept's adaptability is demonstrated through its application in five distinct use cases: (1) modular, all-terrain agricultural platforms; (2) rescue vehicles for search and rescue operations; (3) wheelchair-accessible golf carts; (4) modular, amphibious search and rescue vessels; and (5) robotic lawn mowers for commercial landscaping.

Novelty and Inventive Step

The present inventive concept's novelty lies in its adaptation of four-wheel steering technology to entirely new industries and use cases, not considered in the original patent. The inventive step is in the recognition of the core technology's potential for broader applications and the development of modular systems that enable seamless integration into diverse platforms.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept may include variations in the linkage mechanisms, such as using hydraulic or pneumatic systems, or incorporating advanced sensors and AI algorithms to enhance steering performance. Additionally, the modular system could be adapted for use in other industries, such as construction, mining, or environmental monitoring.

Potential Commercial Applications and Market

The adaptable four-wheel steering technology has significant commercial potential across various industries, including agriculture, search and rescue, golf, amphibious vessels, and commercial landscaping. The target market includes manufacturers of specialized vehicles and equipment, as well as companies seeking to integrate advanced steering systems into their products.

CPC Classifications

SectionClassGroup
A A61 A61H3/04
B B62 B62K5/003
B B62 B62K25/02
A A61 A61H2003/005
A A61 A61H2003/046
B B62 B62K2025/025

Field of Art

Mobility Assistance Devices and Vehicle Steering Systems, encompassing medical mobility aids, agricultural platforms, and specialized vehicle design with expertise in mechanical engineering, biomechanics, and adaptive vehicle control systems

Person of Ordinary Skill (PHOSITA) Profile

A mechanical engineer with 5-7 years experience in vehicle design, familiar with adaptive mobility technologies, capable of translating core mechanical principles across different technical domains and understanding modular design strategies

Obviousness Rationale

A PHOSITA would recognize the fundamental four-wheel steering mechanism disclosed in the source patent as a transferable technological concept that can be readily adapted to multiple platforms. The core mechanical principles of linkage-based steering are universally applicable across diverse mobility and transportation contexts. The modular design approach demonstrated in the PTD represents a predictable engineering extension of the original knee walker technology.

Obvious Combinations & Variations

Source Patent Element
Four-wheel steering system with central steering column and crossbar configuration
PTD Variation
Agricultural platform with identical steering mechanism principles
Obviousness Reasoning
Transferring steering geometry to agricultural platforms represents a known technique for improving vehicle maneuverability, with predictable performance outcomes
Source Patent Element
Tie-rod and cable linkage mechanisms for steering control
PTD Variation
Amphibious rescue vessel incorporating identical steering linkage principles
Obviousness Reasoning
Adapting proven steering linkage technologies to water-based platforms is a standard engineering design choice with foreseeable mechanical results
Source Patent Element
Crossbar-based frame structure supporting steering column
PTD Variation
Robotic lawn mower with modular four-wheel steering system
Obviousness Reasoning
Applying frame design principles to compact mobile platforms represents a straightforward engineering adaptation with predictable mechanical functionality
Source Patent Element
Mobility device with precision steering mechanisms
PTD Variation
Wheelchair-accessible golf cart utilizing identical steering principles
Obviousness Reasoning
Extending mobility assistance technologies across recreational and accessibility domains represents a logical and foreseeable technological progression
Source Patent Element
Four-wheel steering configuration with centralized control
PTD Variation
Search and rescue terrain navigation platform
Obviousness Reasoning
Translating mobility device steering principles to specialized terrain vehicles constitutes a known technique for improving directional control in challenging environments
35 U.S.C. § 103 Summary: Based on US Patent 11857485's disclosure of four-wheel steering technology, the present publication demonstrates that the claimed variations represent obvious extensions of prior art, wherein a person having ordinary skill in the art would readily recognize the transferability of core mechanical steering principles across diverse mobility and transportation platforms, thus rendering subsequent claims of novelty non-patentable under standard obviousness analysis.

Original Patent Information

Patent NumberUS 11,857,485
TitleKnee walker with four-wheel steering
Assignee(s)ROVER MOBILITY, LLC