Modular Fence Rail and Post Assembly Without Fasteners

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Solution Overview

Problem

Existing rail and post fence systems require fasteners for assembly, increasing shipping and storage costs, and there is a need for a system that can be assembled without fasteners and shipped in a nested configuration to reduce these costs.

Innovation Solution

A modular rail and post fence system where elongated posts with longitudinal recesses and opposed protrusions, and rail assemblies with angled edges and hooks, allow for assembly without fasteners by inserting and rotating the rail assemblies into the post recesses, utilizing notches and button protrusions for secure placement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional fasteners are used to attach rails to posts, then the structural integrity and reliability of the fence system is ensured, but the device complexity and assembly time increase, and shipping and storage costs increase due to additional components

Engineering Contradiction:
Improvestructural integrityVSAvoidassembly complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent removes fasteners entirely from the fence system, extracting the connecting function from separate fastener components and integrating it directly into the rail and post structures through formed engagement features like slots, holes, and protrusions

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent combines the fastening function with the rail and post components themselves, merging what were previously separate elements (rails, posts, and fasteners) into integrated structures where the rails and posts directly engage each other through formed features

Inventive Principle:
Principle #5Merging (Combining)

2Ease of operation

If rails and posts are shipped as separate components requiring fasteners, then ease of assembly is improved, but shipping space and storage costs increase

Engineering Contradiction:
Improveease of assemblyVSAvoidshipping volume
Core Design Contradiction:
Ease of operationVSVolume of moving object

Solution Approach 1:

The patent enables rails to be nested within or alongside posts during shipping, with the rail profiles designed to fit within the post structures or alongside them in a compact arrangement, reducing the overall shipping volume while maintaining assembly simplicity

Inventive Principle:
Principle #7Nested doll (Nesting)

3Strength

If fasteners are used to secure rail assemblies to posts, then the connection strength and stability are ensured, but the manufacturing costs and assembly time increase

Engineering Contradiction:
Improveconnection strengthVSAvoidassembly speed
Core Design Contradiction:
StrengthVSProductivity

Solution Approach 1:

The patent creates self-securing connections where the rail assemblies automatically engage with the posts through their own structural features (slots, holes, protrusions) without requiring external fasteners, making the components self-sufficient for their own attachment

Inventive Principle:
Principle #25Self-service

4Adaptability or versatility

If conventional fence systems with multiple components are used, then adaptability and versatility are improved, but the device complexity and shipping costs increase

Engineering Contradiction:
Improvefence configuration flexibilityVSAvoidnumber of components
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs universal post and rail components that can serve multiple functions and configurations, where the same basic post and rail elements can be arranged in different patterns and heights to create various fence configurations without requiring specialized components

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS7690629B1Modular rail and post fence system
Publication Date: 2010.04.06 MASTERCOIL LLC
  • US7690629B1 patent drawing
  • US7690629B1 patent drawing
  • US7690629B1 patent drawing

AI summary

A modular rail and post fence system. The fence system includes a plurality of rail assemblies with each rail assembly formed from a pair of panels. Each panel has a pair of sidewalls joined together at an angle to form an angled edge wherein the pair of panels are joined together to form a rail assembly. A plurality of elongated posts are also provided. Each elongated post has at least one longitudinal recess with a pair of opposed protrusions extending into the longitudinal recess. At least one pair of notches in the pair of opposed protrusions is provided whereby the angled edges of each rail assembly are received in one pair of notches of the elongated posts. The entire system may be fabricated, assembled, and installed without fasteners.