Threshold Cap Assembly with Pivotable Sealing Wall
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Solution Overview
Problem
Existing threshold systems in residential and commercial buildings face challenges in maintaining a durable, weather-tight seal at the bottom of doors due to settlement of houses, which causes movement of mating components and compromises the initial seal, with homeowners rarely utilizing manual adjustment features.
Innovation Solution
A self-adjusting threshold cap assembly with a pivotable sealing wall and biasing member that automatically adjusts to maintain a seal, comprising a holder with a pivot axis and a threshold cap that can pivot to ensure a consistent seal as the door panel and threshold change positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manual adjustment feature is provided on the threshold cap, then the seal can be adjusted to compensate for house settlement, but homeowners rarely use the adjustment feature making it ineffective
Solution Approach 1:
The threshold cap assembly automatically adjusts itself through a spring-biased mechanism that allows the cap to move vertically along the threshold without requiring manual intervention. The spring-loaded adjustment feature self-regulates to maintain optimal sealing contact as the door and threshold settle over time.
2Reliability
If the threshold cap is made stationary to simplify the design, then manufacturing is easier, but the seal deteriorates as the door and threshold settle
Solution Approach 1:
The threshold cap transitions from a stationary component to a dynamic, movable component that can adjust its position vertically. The cap is mounted on a movable assembly with a spring mechanism that allows it to self-adjust to changing positions of the door and threshold due to settlement, maintaining effective sealing contact.
3Adaptability or versatility
If the sealing wall is made movable to adapt to position changes, then the seal remains effective after settlement, but the mechanism becomes more complex
Solution Approach 1:
The threshold cap assembly is divided into separate functional components: a movable threshold cap with sealing wall, a holder assembly, and a spring mechanism. This segmentation allows the sealing wall to pivot independently on a hinge while the holder and spring provide the adjustment mechanism, distributing complexity across modular components.
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 solution provides an automatic and reliable sealing mechanism that maintains a weather-tight seal without requiring homeowner intervention, ensuring effective prevention of air and water infiltration even as the door and threshold fit changes over time.
Implementation Method 1
a biasing member configured to bias the sealing wall upward
Implementation Method 2
a joint portion configured to engage with the holder such that the sealing wall is capable of pivoting about the pivot axis
Data Source
AI summary
An assembly that is configured to form a seal with a bottom of a closed door panel includes a holder, a threshold cap, and a biasing member. The holder defines a pivot axis and is configured to releasably couple to a substrate of a threshold. The threshold cap includes a sealing wall and a joint portion. The sealing wall is configured to form a seal with the bottom of the closed door. The joint portion is engaged with the holder to pivotally support the threshold cap about the pivot axis. The biasing member biases the sealing wall away from the holder towards a raised position.