Door Guard Flange Resists Prying on Pivot Panels

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing door opening assemblies are vulnerable to attempts to pry open the door panel, leading to potential unauthorized access and damage to the door and frame.

Innovation Solution

The assembly incorporates a door guard in the form of a flange extending inwardly from the panel towards the frame, which protects the distal side of the panel from being forcibly pried away, combined with a locking mechanism and installation hardware for secure attachment to the building structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a door panel with a lip is used to secure a building opening, then the door can be easily opened and closed, but the lip becomes vulnerable to prying attacks and can be damaged

Engineering Contradiction:

Improveease of opening and closing doorVSAvoidvulnerability to prying attacks

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A door guard is introduced as an intermediary protective element between the prying force and the door panel lip. The door guard absorbs and dissipates the prying force, preventing direct transmission to the vulnerable lip while allowing normal door operation to proceed uninterrupted.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The door guard is pre-installed on the door panel to provide protective cushioning before any prying attack occurs. This preventive measure ensures that when prying forces are applied, the damage is absorbed by the door guard rather than the critical lip structure, maintaining door functionality.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If the door panel lip is exposed to allow pivoting motion, then the door can function properly, but the exposed lip creates an attack point for forced entry

Engineering Contradiction:

Improvedoor pivoting functionalityVSAvoidresistance to forced entry

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The door guard is strategically positioned only at the specific location where the lip is vulnerable to prying attacks, while leaving other areas of the door panel unchanged. This localized protection maintains the door's overall pivoting functionality while strengthening the specific weak point.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The protective function is segmented from the main door panel structure by using a separate, attachable door guard component. This segmentation allows the door to maintain its original pivoting mechanics while adding targeted protection at the vulnerable lip area without modifying the entire door structure.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12264534B2Door guard

Publication Date: 2025.04.01 DOOR & WINDOW GUARD SYST

AI summary

An assembly for securely enclosing a door opening or window opening defined by a structure of a building comprising. The assembly includes a panel that is sized to substantially cover the opening and is pivotally secured to a frame. In some cases, the panel includes a proximal side pivotally connected with the frame and a distal side that swings between an open and closed position. The panel includes a door guard configured to protect the distal side of the panel from being forcibly pried away from the frame.