Dual-Hinge Galley Door Mechanism for 180-Degree Flush Opening
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Solution Overview
Problem
Conventional door hinges for swinging doors, especially in aircraft galleys, fail to allow full 180-degree opening without protruding, which obstructs aisle space and is unsightly.
Innovation Solution
A 180-degree opening door hinge with an elongate spine and dual hinges, where a primary hinge and a secondary hinge are pivotally-mounted along the spine, each with a 90-degree range of motion, allowing combined 180-degree door movement without protruding when closed, and mounted within the spine's thickness planes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional piano hinges are used to allow full 180-degree door opening, then the door can open fully, but the hinges protrude forward of the door creating obstacles in the aisle
Solution Approach 1:
The hinge assembly is divided into two separate hinges (first hinge and second hinge) mounted on opposite sides of the door. Each hinge provides approximately 90 degrees of pivoting motion, combining to achieve the full 180-degree door opening range while keeping individual hinge profiles compact and non-protruding
Solution Approach 2:
The invention transitions from a single-hinge system to a dual-hinge system arranged in three-dimensional space, with hinges positioned at different locations and orientations. This spatial arrangement allows the door to achieve 180-degree rotation without requiring individual hinges to protrude forward of the door surface
2Ease of operation
If protruding hinges are used to achieve full 180-degree door opening, then the door can open fully, but the hinges are unsightly and present obstacles in the aisle
Solution Approach 1:
By segmenting the hinge function into two independent hinges positioned on opposite sides of the door, each hinge can be mounted flush with the door surface rather than protruding. This segmentation allows the door to achieve full 180-degree opening while eliminating the visual and physical obstacles created by protruding hinges
Solution Approach 2:
The elongate spine acts as an intermediary structural element that bridges the two hinges and connects to the door and jamb. This intermediary component enables the transmission of rotational motion while maintaining a flush profile, eliminating the need for protruding hinge structures
3Shape
If substantially flush-mounted hinges are used, then the hinge profile is clean and non-obstructive, but the door is incapable of opening a full 180 degrees
Solution Approach 1:
The hinge system is segmented into two independent hinges positioned on opposite sides of the door, each capable of pivoting approximately 90 degrees. This segmentation enables the door to achieve full 180-degree opening while maintaining a flush-mounted profile, as each individual hinge remains compact and non-protruding
Solution Approach 2:
The invention introduces dynamic movement independence between the two hinges, allowing each hinge to pivot independently through its 90-degree range. This dynamic capability combines to provide the full 180-degree door opening range while maintaining a static, flush profile when the door is closed
Data Source
AI summary
A 180 degree opening door hinge including an elongate spine having first and second edges extending along a length thereof, a primary hinge pivotally-mounted adjacent the first edge having a bracket for attaching the spine to a door jamb, and a secondary hinge pivotally-mounted adjacent the second edge having a bracket for attaching the spine to a door, wherein each of the primary and secondary door hinges have a range of pivoting motion of about 90 degrees relative to the spine, and a combined range of pivoting motion of about 180 degrees of the door relative to the door jamb.