Wheelbarrow Hitch Coupling for Quick Tow-and-Manual Switching

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Solution Overview

Problem

Existing equipment in the landscaping industry, such as manual wheelbarrows and machine-powered towable equipment, face challenges in efficiency and productivity due to user fatigue, limited maneuverability, and the difficulty of seamlessly converting between ride-on and manual use.

Innovation Solution

A device comprising a hitch receiver adapter and a round bar that allows for quick and tool-free attachment and detachment of manual push/pull type equipment, such as wheelbarrows, to a powered tow vehicle, enabling seamless interchangeability between ride-on and manual use while restricting roll movements to maintain stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual wheelbarrow equipment is used, then maneuverability and efficiency in small areas is improved, but user fatigue increases and productivity decreases

Engineering Contradiction:

ImprovemaneuverabilityVSAvoidproductivity

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The system dynamically switches between manual and machine-powered modes based on operational needs. The wheelbarrow can be quickly attached to or detached from the ride-on mower, allowing the user to adapt the system's operational characteristics in real-time rather than being fixed in one mode.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The wheelbarrow is designed with universal functionality to operate in multiple modes: manual propulsion for small-area work and machine-towed operation for large-area or long-distance transport. This multi-functionality resolves the contradiction by allowing the same equipment to serve both purposes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If machine-powered towable equipment is used, then productivity in large areas is improved, but maneuverability is restricted due to bulky size

Engineering Contradiction:

ImproveproductivityVSAvoidmaneuverability

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

3Productivity

If equipment is designed for ride-on use, then productivity in large areas is improved, but the ability to use independently in small areas is lost or becomes difficult to convert

Engineering Contradiction:

ImproveproductivityVSAvoidadaptability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The wheelbarrow is pre-equipped with a hitch receiver that matches the ride-on mower's towing capability. This preliminary preparation allows for rapid attachment and detachment without requiring complex conversion processes, enabling seamless switching between operational modes.

Inventive Principle:

Principle #10Preliminary action

4Adaptability or versatility

If a tow hitch system is implemented, then versatility of equipment is improved, but the attaching and detaching process becomes time-consuming requiring tools, pins or straps

Engineering Contradiction:

ImproveversatilityVSAvoidtime

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent replaces traditional mechanical fastening systems (pins, straps, tools) with a simplified coupling mechanism. The wheelbarrow features a U-shaped channel that receives and secures the tow bar through gravity and geometry alone, eliminating the need for additional fastening components and tools.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts the essential function of the hitch system down to its minimum necessary components. By removing unnecessary pins, straps, and fastening mechanisms, the design achieves rapid attachment and detachment while maintaining secure towing capability.

Inventive Principle:

Principle #2Taking out (Extraction)

5Adaptability or versatility

If traditional hitch receivers are used, then compatibility with various equipment is improved, but quick interchangeability between ride-on and manual use is not achieved

Engineering Contradiction:

ImprovecompatibilityVSAvoidefficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250033424A1Device for quickly attaching and detaching equipment

Publication Date: 2025.01.30 ADAMS JAMES STEPHEN

AI summary

An apparatus for removably attaching manual equipment, which includes one wheel, to a power tow vehicle. The apparatus includes a cradle clamp head assembly; a vertical body assembly having a first end and an opposing second end, the cradle clamp head assembly configured to be attached to the vertical body assembly closer to the first end than the second end of the vertical body assembly; and a hitch receiver adapter configured to be attached to the vertical body assembly, while the cradle clamp head assembly is attached to the vertical body assembly, such that the hitch receiver adapter is further from the first end of the vertical body assembly than the cradle clamp head assembly.