Self-Articulating Threshold Cap for Weathersealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing entryway systems face challenges in preventing rainwater leakage due to movement of building components over time, leading to compromised weathersealing and unsightly appearances, with previous solutions like flexible seals and plastic threshold caps failing to effectively manage water ingress and egress.
Innovation Solution
A self-articulating threshold cap system that adjusts to form a sealing barrier with the door sweep and includes a threshold substrate with drain holes and separate air inlets to manage water entry and exit, allowing non-incidental water to enter and be directed out while maintaining a seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manually adjustable threshold cap is used to seal with the door panel, then the sealing performance can be improved, but the complexity of the adjustment mechanism increases and manual adjustment becomes difficult to achieve properly
Solution Approach 1:
The threshold cap assembly performs self-adjustment through its own weight and the interaction with the door panel. The articulating top portion automatically moves to engage with the door panel or door sweep, eliminating the need for manual screw mechanisms while maintaining reliable sealing performance.
Solution Approach 2:
The threshold cap assembly transitions from a static fixed position to a dynamic self-articulating mechanism. The articulating top portion can move between engaged and disengaged positions, allowing the system to adapt to building settlement and maintain proper sealing without manual intervention.
2Object-affected harmful factors
If flexible bellows-type seals are used to seal the gap between threshold cap and channel, then water leakage can be reduced, but the seals harden, shrink and crack over time, allowing water to seep through
Solution Approach 1:
The patent changes the material parameter from flexible bellows-type seals to a rigid plastic threshold cap assembly. This rigid structure maintains its sealing capability over time without hardening, shrinking, or cracking, while still effectively preventing water leakage through the gap between the threshold cap and channel.
Solution Approach 2:
The threshold cap assembly uses a composite construction with a plastic body and integrated sealing features. This composite design combines the structural integrity of plastic material with built-in sealing mechanisms (such as fins or lips that contact the channel surface), creating a durable water-resistant barrier that does not degrade over time.
3Object-affected harmful factors
If plastic threshold caps with overlapping tongues are used to prevent leakage, then water can be blocked from entering the gap, but leakage still occurs due to the capillary effect between the tongues and dams
Solution Approach 1:
The patent extracts the sealing function from the overlapping tongue structure and implements it through a separate fin or lip element that actively contacts the channel surface. This fin extends downward from the threshold cap and makes direct contact with the channel wall, creating a positive seal that prevents water entry without relying on the capillary action of overlapping tongues.
Solution Approach 2:
The fin or lip acts as an intermediary sealing element between the threshold cap and the channel. This intermediate component fills the gap and creates a physical barrier that prevents water from penetrating through the interface, effectively eliminating the capillary leakage problem associated with direct tongue-to-dam contact.
4Ease of operation
If cap plugs are placed in adjustment hardware holes to address sealing issues, then adjustment can be limited, but the cap plugs interfere with the sealing of the threshold cap to the door panel
Solution Approach 1:
The patent removes the adjustment hardware holes and cap plugs from the design entirely. The self-articulating threshold cap assembly achieves sealing through its articulating top portion engaging with the door panel or door sweep, eliminating the need for adjustment holes and preventing any interference from cap plugs with the sealing interface.
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
The system effectively prevents water from leaking beneath the threshold, directing it out through drain holes while allowing air to enter through separate inlets, ensuring a watertight seal and reducing the risk of subfloor damage.
Implementation Method 1
a self-articulating threshold cap configured to self-adjust toward the door sweep and interact therewith to form a sealing barrier
Implementation Method 2
at least one drain hole configured to allow water to exit the threshold substrate
Implementation Method 3
at least one air inlet configured to allow air to enter the threshold substrate
Implementation Method 4
self-articulating threshold cap configured to self-adjust toward the door sweep and interact therewith to form a sealing barrier
Data Source
AI summary
A door entryway system can include a door sweep capable of attachment to a bottom of a door panel. The system also includes a threshold assembly having a self-articulating threshold cap configured to self-adjust toward the door sweep and interact therewith to form a sealing barrier when the door panel is in a closed position.