Variable Depth Seal Grooves for Non-Circular Hermetic Doors
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Solution Overview
Problem
Non-circular doors in sealable chambers experience nonuniform deflection under compression, leading to potential leak paths and requiring additional structural reinforcements that increase weight, complexity, and maintenance issues.
Innovation Solution
Implementing variable depth seal grooves that compensate for nonuniform deflection by varying the exposed height of the seal to maintain a hermetic seal, eliminating the need for heavy reinforcements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If structural reinforcements (multiple radial ribs) are added to the door to resist nonuniform deflection, then the door's rigidity and resistance against nonuniform deflection are improved, but the door's weight, complexity, manufacturing costs, and maintenance requirements increase
Solution Approach 1:
The patent applies local quality by creating variable depth seal grooves at specific locations around the door perimeter. The groove depth varies locally to compensate for nonuniform deflection patterns, with deeper grooves positioned where the door deflects more and shallower grooves where deflection is less. This localized modification provides the necessary compensation without requiring global structural reinforcements throughout the door.
Solution Approach 2:
The patent changes the geometric parameter of the seal groove depth to compensate for deflection effects. By varying the groove depth parameter around the door perimeter, the effective seal height is adjusted to maintain contact between the seal and the mating surface despite nonuniform door deflection under compression loads.
2Strength
If structural reinforcements are added to the door, then the door can maintain structural integrity under compression, but the manufacturing costs increase
Solution Approach 1:
Instead of uniformly reinforcing the entire door structure, the patent applies selective modifications only where needed - the variable depth seal grooves are created only in the seal groove locations. This localized approach reduces manufacturing complexity and cost compared to adding radial ribs or other structural reinforcements across the entire door.
Solution Approach 2:
The patent extracts the reinforcement function from the door structure itself and relocates it to the seal groove geometry. Rather than making the door structure itself stronger through added ribs, the compensation function is extracted and implemented through the variable depth grooves, separating the structural support function from the seal compensation function.
3Strength
If structural reinforcements are added to the door, then the door can resist nonuniform deflection, but the weight of the door increases
Solution Approach 1:
The patent makes minimal local modifications to the door structure by creating variable depth grooves rather than adding substantial reinforcement elements. This approach compensates for deflection effects while adding negligible weight, unlike radial ribs or other structural reinforcements that would significantly increase door mass.
Solution Approach 2:
The patent achieves deflection compensation by changing the geometric parameters of existing features (groove depth) rather than adding new structural elements. This parameter modification approach maintains the door's original weight while providing the necessary compensation for nonuniform deflection.
Data Source
AI summary
A sealable chamber may include a chamber aperture, an aperture border, a first surface encompassing the chamber aperture, a chamber door having a second surface configured to at least partially engage against the first surface of the aperture border, and a seal positioned intermediate the first surface and the second surface. The chamber door may have a non-circular shape. At least a portion of the second surface of the chamber door may exhibit nonuniform deflection relative to the first surface of the aperture border when a compression force is applied to the chamber door to compress the second surface against the first surface. An exposed height of the seal intermediate the first surface and the second surface may be configured to vary and compensate for the nonuniform deflection to maintain a hermetic seal between the first surface and the second surface.