Concealed Folding Door Hinge and Locking Assembly for Panel Alignment
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Solution Overview
Problem
Conventional folding door systems face challenges with complex installation, maintenance, alignment issues, and compromised aesthetics due to visible hardware, limited adjustability, and inadequate structural support, particularly in exterior applications.
Innovation Solution
A continuous hinge assembly with integrated pivots, rollers, weather seals, and a locking system that secures to door panels without machining, featuring adjustable mechanisms and concealed components for improved alignment and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional roller or bogie hardware is mortised into panels with highly machined components, then guided translation along tracks is achieved, but installation complexity and long-term maintenance challenges increase
Solution Approach 1:
The patent replaces highly machined, precision roller components with simple plastic feet that are easier to install and replace. These feet attach to the bottom of panels and slide along the track without requiring precise machining or complex assembly, significantly reducing installation and maintenance complexity while maintaining functional reliability.
Solution Approach 2:
The patent extracts the complex roller mechanism from the system and replaces it with a simpler alternative. By removing the need for mortised rollers and highly machined components, the design simplifies the overall hardware system while preserving the essential function of guided translation along the track.
2Reliability
If locking hardware such as shoot bolts or multipoint locks is surface-mounted or recessed into machined cavities, then panels are secured in closed position, but fabrication complexity and material removal increase
Solution Approach 1:
The patent replaces complex shoot bolts and multipoint locks with simple magnetic locking components. These magnetic locks require no machining of cavities or complex fabrication, yet provide reliable securing of panels in the closed position, dramatically simplifying manufacturing while maintaining locking functionality.
Solution Approach 2:
The patent substitutes traditional mechanical locking mechanisms (shoot bolts, flush bolts, multipoint locks) with a magnetic field-based locking system. This replacement eliminates the need for machined cavities and complex mechanical assemblies, reducing fabrication complexity while maintaining secure panel closure.
3Reliability
If external locking hardware is installed on door panels, then panels are secured, but visual presentation is compromised and critical mechanisms are exposed to tampering or environmental degradation
Solution Approach 1:
The patent embeds magnetic locking components within the panel structure or frame, nesting the security mechanism inside rather than mounting it externally. This concealment preserves the clean visual presentation of the door panels while maintaining secure locking functionality, and protects the mechanisms from tampering and environmental damage.
Solution Approach 2:
By replacing external mechanical locking hardware with magnetic locking systems that can be integrated into the panel or frame structure, the patent eliminates visible external hardware. The magnetic fields provide secure locking without compromising aesthetics or exposing mechanisms to environmental degradation.
4Reliability
If weather seals are installed in machined slots or adhesive channels, then gaps are closed, but regular adjustment or replacement is required to remain effective
Solution Approach 1:
The patent replaces permanent weather seals installed in machined slots with removable adhesive channels or seal strips that can be easily applied and replaced. These simpler seal components require no machining, can be adjusted or replaced without complex procedures, and maintain effective sealing while reducing maintenance burden.
5Manufacturing precision
If alignment tolerances between folding panels are tight to ensure seal compression, then sealing is effective, but small angular misalignments can impair compression or introduce leakage
Solution Approach 1:
The patent incorporates adjustable mechanisms that allow the door panels and sealing components to dynamically adapt to alignment variations. This adjustability compensates for small angular misalignments that occur during installation or operation, ensuring consistent seal compression and effectiveness without requiring extremely tight manufacturing tolerances.
Data Source
AI summary
Folding door systems, methods and devices includes a first door panel, a second door panel, and an astragal mounted to the first panel. A concealed hinge block is embedded within the astragal and provides a vertically adjustable base for a pin knuckle that couples to a receiver knuckle on the second panel. An integrated shoot bolt actuator system that drives bolts into a header and sill to secure the panels in a closed position operates around the hinge block. A worm gear-based adjuster mechanism within a receiver knuckle enables fine alignment between the two door panels in relation to the hinge knuckle. The system conceals all fasteners and actuator components within the astragal, supporting both inswing and outswing configurations. The modular architecture improves field adjustability, enhances aesthetics, and maintains compatibility with standard door panel constructions while enabling the panels to fold fully open against one another for maximum clear opening.