Sealing Profile with Extended Legs for Reduced Stroke Length
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Solution Overview
Problem
Existing seals for movable door and window leaves fail to provide a comprehensive seal against both the door/window leaf and the fixed medium, leading to drafts and sound/smoke leakage due to manufacturing tolerances and climate-related issues, while also requiring complex groove designs and increased stroke lengths for effective installation.
Innovation Solution
A seal design where the sealing profile has extended sections on its legs that can bear against the groove walls or door/window leaf, allowing for sealing without needing to be installed at the groove bottom, with flared lugs or predetermined buckling points for enhanced contact, enabling a flush fit and reduced stroke length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seal is installed in the bottom of the groove, then the door leaf can be shortened without remilling the groove, but the sealing strip has to be lifted farther than necessary and the stroke is increased which is detrimental to soundproofing
Solution Approach 1:
The sealing profile is designed with extended legs that seal in a different spatial dimension (against the groove walls laterally) rather than requiring deep vertical installation in the groove bottom. This dimensional change allows the seal to function effectively at higher positions in the groove, reducing the required stroke length while maintaining adaptability to door leaf length variations.
2Reliability
If the seal is installed in the bottom of the groove, then the contact area in the area of the web is sufficient, but the sealing strip has to be lifted farther and the stroke is increased
Solution Approach 1:
The sealing function is segmented into multiple contact points: the web provides sealing contact with the floor, while the extended legs provide separate sealing contacts with the groove walls. This segmentation allows the seal to achieve reliable sealing without requiring deep installation in the groove bottom, thus reducing the stroke length while maintaining sealing reliability.
3Adaptability or versatility
If grooves are milled deeper, then the door leaf can be shortened without remilling, but the stroke is increased which is detrimental to soundproofing
Solution Approach 1:
The sealing contact is extended laterally along the groove walls through the extended legs, providing effective sealing at higher positions in the groove. This allows shallower groove designs to achieve the same sealing effect, thereby reducing the stroke length and improving soundproofing performance while maintaining adaptability to door leaf length variations.
4Object-affected harmful factors
If the seal is not installed at the groove bottom, then the stroke length is reduced improving soundproofing, but the groove design becomes more complex
Solution Approach 1:
The extended legs provide localized sealing contact at specific points along the groove walls, allowing the seal to function effectively at higher positions without requiring complex groove geometries. The localized sealing action simplifies the overall groove design while achieving superior soundproofing performance.
5Reliability
If the sealing profile seals against the housing profile, then the seal is protected, but drafts and sound/smoke can pass through gaps between the housing profile and door leaf
Solution Approach 1:
The sealing function is divided into two independent sealing actions: the web seals against the floor, while the extended legs seal against the groove walls and door leaf. This segmentation creates multiple sealing barriers that prevent drafts and sound leakage while the housing profile continues to provide protection for the sealing mechanism.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design ensures a tight seal against both the door/window leaf and the fixed medium, reducing drafts and sound/smoke leakage, while allowing for simpler groove designs and shorter stroke lengths, enhancing soundproofing and durability by avoiding long trigger travel and potential damage.
Implementation Method 1
an elastic sealing profile (3) which is provided for sealing against the floor (B) in the sealing position of the sealing strip (2, 3) with a first section (31)
Data Source
Figure 1~1a
Figure 2~2a
Figure 3
AI summary
The seal (D) has one or multiple holding units. The sealing strip is supported in a sliding manner in the holding unit or units from an idle position in a sealing position. The other section or multiple other sections lies or rests of one or both sides of the sealing profile at a groove wall or the outer side of the door wing (F) or window wing in the sealing position of the sealing strip.