Frame Pool T-Joint Assembly Without Mechanical Fasteners

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Solution Overview

Problem

Existing above ground frame pools face challenges in achieving a balance between structural strength, ease of assembly and disassembly, and water resistance, while also being convenient to manufacture and store.

Innovation Solution

A frame assembly comprising a first and second horizontal frame that narrows at their ends, a vertical frame that narrows at its upper end, and T-shaped joints that connect these frames without mechanical fasteners, allowing for a friction-fit connection and integrally molded or modular design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the frame assembly uses mechanical fasteners to connect horizontal and vertical frames, then the structural strength and stability are improved, but the ease of assembly and disassembly deteriorates

Engineering Contradiction:
Improvestructural strengthVSAvoidease of assembly and disassembly
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

The patent replaces mechanical fasteners (screws, bolts, nuts, washers) with a friction-fit connection system. The T-shaped joint includes friction surfaces that engage with the horizontal and vertical frames through frictional force, eliminating the need for mechanical fasteners while maintaining structural integrity and enabling easy assembly and disassembly.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The friction-fit connection system is self-assembling and self-locking. When the T-shaped joint is inserted into the horizontal and vertical frames, the friction surfaces automatically engage and hold the connection without requiring additional fastening operations. The connection relies on the friction between surfaces to maintain structural strength.

Inventive Principle:
Principle #25Self-service

2Strength

If the frame assembly uses a monolithic design, then the structural strength is improved, but the ease of manufacture and storage deteriorates

Engineering Contradiction:
Improvestructural strengthVSAvoidease of manufacture and storage
Core Design Contradiction:
StrengthVSEase of manufacture

Solution Approach 1:

The frame assembly is divided into separate modular components: horizontal frames, vertical frames, and T-shaped joints. Each component can be manufactured independently using standard extrusion processes for aluminum or steel profiles. The T-shaped joints are separate pieces that connect the horizontal and vertical frames through friction-fit connections, enabling modular assembly and compact storage when disassembled.

Inventive Principle:
Principle #1Segmentation

3Ease of manufacture

If the frame assembly uses traditional connection methods with multiple parts, then the ease of manufacture is improved, but the water resistance deteriorates

Engineering Contradiction:
Improveease of manufactureVSAvoidwater resistance
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The friction surfaces are integrated into the T-shaped joint and frame profiles themselves, eliminating the need for separate gaskets, seals, or waterproofing components. The continuous friction contact between the T-shaped joint and the frames creates a water-tight connection while maintaining ease of manufacture through standard extrusion processes.

Inventive Principle:
Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enhances the ease of manufacturing, assembly, disassembly, and storage of the frame pool while maintaining structural integrity and water resistance, simplifying the process and improving convenience.

Implementation Method 1

The joints may lack mechanical fasteners with adjacent pipes or corresponding apertures. The joints may be one-piece or multi-piece structures.

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentEP3853430B1Above ground frame pool and method of assembly therefore
Publication Date: 2026.01.28 INTEX MARKETING
  • EP3853430B1 patent drawingFigure 1
  • EP3853430B1 patent drawingFigure 2
  • EP3853430B1 patent drawingFigure 3

AI summary

An above ground frame pool (10) includes a frame assembly (20) and a liner (40) supported by the frame assembly (20). The frame assembly (20) includes a plurality of horizontal pipes (22), a plurality of vertical pipes (24), and a plurality of T-shaped joints (30). The joints (30) may lack mechanical fasteners with adjacent pipes or corresponding apertures. The joints (30) may be one-piece or multi-piece structures. Such joints (30) maybe water-resistant and convenient to manufacture, assemble, disassemble, and store.