Protective Door System for High Pressure Enclosures

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Solution Overview

Problem

Conventional electrical enclosure door systems require high precision and costly latching mechanisms to resist high internal pressures, necessitating complex alignment and adjustments during manufacturing and maintenance, which increases costs and complexity.

Innovation Solution

A protective door system that employs an inner door seating against interior surfaces along multiple edges of the enclosure, using a closure mechanism with an externally mounted handle to inhibit outward movement under high internal pressures without relying on precise latching, allowing the door to self-seal and maintain closure under rising pressure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional latching mechanisms are used to resist high internal pressures, then the enclosure can maintain closure under pressure, but the system requires high precision alignment and costly components

Engineering Contradiction:

Improveclosure maintenance under pressureVSAvoidlatching alignment precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

Instead of using a latching mechanism that actively locks the door against pressure, the patent inverts the approach by allowing the door to remain unsecured and relying on the pressure differential itself to maintain closure. The door is designed to be held closed by the pressure difference between the interior and exterior, eliminating the need for precision latching mechanisms.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The door system utilizes the internal pressure itself to maintain its closed state, rather than requiring an external latching mechanism. The pressure differential automatically serves the function of keeping the door sealed, making the system self-regulating and eliminating complex alignment requirements.

Inventive Principle:

Principle #25Self-service

2Strength

If precision latching mechanisms are used, then the door can resist high internal pressures, but the system complexity and manufacturing cost increase

Engineering Contradiction:

Improvepressure resistanceVSAvoidlatching mechanism complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent extracts and removes the complex latching mechanism from the door system entirely. Instead of adding a latching component to resist pressure, the design relies on the fundamental pressure differential to maintain closure, significantly simplifying the device while maintaining strength.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the operational parameter from active latching to passive pressure-based closure. By altering how the door maintains its closed state—from mechanical locking to pressure differential—the system achieves the same strength requirement with reduced complexity.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If conventional latching systems are used, then the door can be secured, but alignment adjustments are required during manufacturing and maintenance

Engineering Contradiction:

Improvedoor securing capabilityVSAvoidalignment adjustment requirement

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Instead of requiring the latching mechanism to align precisely with the door, the patent inverts the approach by having the door align with the enclosure opening through simple geometric matching. The pressure-based closure system eliminates the need for complex alignment adjustments during manufacturing and maintenance.

Inventive Principle:

Principle #13The other way round (Inversion)

4Strength

If high precision latching mechanisms are used, then the enclosure can resist high internal pressures, but the manufacturing and maintenance costs increase

Engineering Contradiction:

Improvepressure resistanceVSAvoidmanufacturing and maintenance cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent replaces expensive, precision-engineered latching mechanisms with a simpler, lower-cost door design that relies on pressure differential. The simplified construction reduces manufacturing costs while maintaining the necessary pressure resistance through the unsecured door design.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS7654404B2Protective door system for enclosures resistant to high internal pressures

Publication Date: 2010.02.02 ROCKWELL AUTOMATION TECH INC

AI summary

Protective door systems are presented for equipment enclosures in which an inner door is provided to resist outward opening pressures by facing or abutting one or more interior surfaces of an enclosure opening, with an optional outer panel covering the enclosure opening from the outside, where a closure mechanism is operated by an externally rotatable handle to initially back the inner door away from the enclosure front side and then to move the inner door upward at an angle to effectively clear two edges of the opening to allow pivoting of the inner door to an open position extending partially outside the enclosure opening.