Universal Concealed Door Frame With Hinge Adapters and Straight-Cut Assembly

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Solution Overview

Problem

Traditional concealed door frame systems require precise measurement and custom fabrication, necessitating multiple profile models and complex planning, leading to high costs and potential installation errors due to misalignments and limited hinge compatibility.

Innovation Solution

A universal frame system with a single profile design that accommodates different door opening configurations using straight cuts, featuring adapters for conventional hinges, and a connecting element for easy assembly, reducing the need for multiple profile models and simplifying installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple door frame profile models are used to accommodate different door opening configurations, then the frame can be adapted to various swing directions and opening types, but the device complexity and inventory management become more complex

Engineering Contradiction:

Improveadaptability to door opening configurationsVSAvoidcomplexity of profile models

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a single door frame profile that can accommodate multiple door opening configurations (inward/outward swinging, right/left door swing) through the use of interchangeable hinge adapters. The profile includes a standardized channel and mounting structure that accepts different hinge types, eliminating the need for multiple specialized profile models while maintaining full adaptability to various door swing directions and opening types.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent segments the door frame system into distinct functional components: the universal profile structure and interchangeable hinge adapters. This segmentation allows the profile to remain simple and standardized while the adapters provide the necessary variation for different door configurations. The connecting elements are also designed as separate, pre-fabricated components that simplify assembly.

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If precise measurement and custom fabrication are performed off-site, then the frame can be precisely fitted to the door opening, but the manufacturing complexity and potential for errors increase

Engineering Contradiction:

Improveprecision of frame fittingVSAvoidease of off-site preparation

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by pre-fabricating the connecting elements and hinge adapters as standardized components before installation. The profile sections are pre-cut with standardized dimensions and the connecting elements are pre-formed with standardized connection features. This allows for simple on-site assembly without requiring complex off-site measurement and custom fabrication, reducing both manufacturing complexity and the risk of errors while maintaining precise fitting through standardized tolerance ranges.

Inventive Principle:

Principle #10Preliminary action

3Manufacturing precision

If conventional hinges are restricted to specific models, then the hinge recesses can be precisely machined, but the adaptability to different hinge types is limited

Engineering Contradiction:

Improveprecision of hinge recessesVSAvoidcompatibility with hinge types

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The patent introduces hinge adapters as intermediary components between the universal profile and the door leaf hinges. These adapters feature a standardized interface with the profile (including precision-machined recesses for accurate positioning) and a complementary interface with conventional hinges. This intermediary design allows the precise recesses to be maintained for accurate hinge positioning while simultaneously providing adaptability to support various hinge models and types.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Ease of manufacture

If miter-cutting is used to connect profile sections at 90-degree angles, then the frame can be assembled, but the measurement and execution complexity increase

Engineering Contradiction:

Improveease of frame assemblyVSAvoidprecision of angle connections

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent inverts the traditional approach by using pre-fabricated connecting elements with standardized 90-degree connections rather than requiring on-site miter-cutting. The connecting elements are pre-formed with the correct angles and connection features, allowing for simple straight cuts at the profile ends. This eliminates the need for complex miter-cutting operations while maintaining precise 90-degree angle connections, significantly reducing measurement and execution complexity during assembly.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS20260015904A1Universal frame for concealed doors suitable for inward and outward opening configurations and right or left door swing

Publication Date: 2026.01.15 TORRABIAS CANTAL OSCAR

AI summary

A frame that addresses the identified technical problems and provides a universal construction system for concealed door frames that can be applied interchangeably to doors opening outward or inward, using only four structural components and without requiring any off-site preparation before installation.