Adjustable Door Threshold Modular Depth
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Solution Overview
Problem
Conventional door thresholds fail to accommodate varying wall and frame depths, leading to issues with carpet continuity and compliance with fire codes, particularly in applications like double-door setups where a single stock threshold is required to span the entire frame depth.
Innovation Solution
The development of an adjustable door threshold structure featuring a main body formed by connecting male and female feet, or two female feet with a center insert, or a foot joined to a riser, allowing for customizable depth adjustments through interlocking mechanisms and optional center bridge inserts, enabling the threshold to span different frame depths while maintaining carpet integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single stock threshold is used to span the entire frame depth in double-door setups, then compliance with fire codes and carpet continuity are improved, but the ability to accommodate varying wall and frame depths is worsened
Solution Approach 1:
The threshold is divided into multiple modular sections (first threshold section, second threshold section, and optionally third threshold section) that can be connected together. Each section can be independently sized and configured, allowing the threshold to be adapted to various frame depths while maintaining compliance with fire codes and carpet continuity requirements.
Solution Approach 2:
The threshold system incorporates adjustable and reconfigurable components that allow it to dynamically adapt to different installation requirements. The modular sections can be arranged in different configurations and adjusted to accommodate varying wall and frame depths, transforming a static single-stock threshold into a dynamic, adaptable system.
2Ease of manufacture
If conventional door thresholds are used, then installation is simplified, but carpet continuity and security are worsened due to the need for carpet tacks
Solution Approach 1:
The design eliminates the need for separate carpet tacks by integrating carpet retention features directly into the threshold structure itself. The threshold sections include built-in mechanisms such as channels, grooves, or interlocking features that secure the carpet without requiring additional fastening elements, thereby removing the hazard of loose tacks while maintaining carpet continuity.
3Ease of manufacture
If fixed-depth thresholds are used, then manufacturing is simplified, but adaptability to different frame depths and carpet thicknesses is worsened
Solution Approach 1:
The threshold is segmented into multiple standardized modules with predetermined depth variations. Each module can be manufactured using standardized processes, maintaining manufacturing simplicity, while the combination of modules allows customization to match different frame depths and carpet thicknesses without requiring completely custom manufacturing for each application.
Data Source
AI summary
A door threshold may comprise a main body formed from two feet. In certain example embodiments, a male-female connection between the feet may be used to adjust the depth of the door threshold. In certain other example embodiments, a center bridge insert to be used in connection with two female feet to adjust the depth of the door threshold. In still further example embodiments, one or more center layers may be disposed between two feet, with the size of the center layer(s) determining the depth of the door threshold. Also, the door threshold may include upper and lower members for sandwiching carpet and/or carpet padding therebetween which, in certain example embodiments, may grip the carpet to reduce the ease with which it may be pulled out from between the upper and lower members. Thus, certain example embodiments may reduce and/or eliminate the need for tacks proximate to the threshold.