Variable Size Door Window Sill Pan With Drain Grooves
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Solution Overview
Problem
Existing window and door sill pans lack adaptability to various widths, lengths, and heights, leading to increased manufacturing costs and complexity in stocking multiple sizes, and fail to effectively manage moisture drainage across different wind conditions and construction types.
Innovation Solution
A variable width and height sill pan system manufactured through extrusion and injection molding, allowing for adjustable lengths and widths via scoring grooves and snap-fit components, with optional membrane flashing for enhanced moisture management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple fixed sizes of sill pan are manufactured to accommodate different window and door widths, then adaptability to various openings is improved, but manufacturing cost and stocking complexity increase
Solution Approach 1:
The sill pan is divided into multiple separable components including end pieces, center sections, and corner elements that can be assembled in different configurations. This segmentation allows a single base unit to be adapted to various widths through field assembly rather than manufacturing multiple complete sizes.
Solution Approach 2:
The base unit and components are designed with universal features that allow them to serve multiple functions and configurations. The same extruded base can accommodate different window and door widths when combined with appropriate end pieces and center sections, eliminating the need for size-specific manufacturing.
2Adaptability or versatility
If multiple fixed sizes of sill pan are manufactured to accommodate different window and door widths, then adaptability to various openings is improved, but manufacturing cost increases
Solution Approach 1:
The sill pan system is segmented into standardized components that can be mass-produced through extrusion and injection molding processes. This allows efficient manufacturing of individual components rather than costly customization of complete assemblies for each size requirement.
Solution Approach 2:
The system allows parameter changes in the field through selective cutting and assembly of components rather than requiring different manufacturing parameters for each size. The base unit can be cut to different lengths and combined with various end pieces to achieve the desired final dimensions.
3Productivity
If a single base unit is used for all sizes by cutting and assembly, then manufacturing efficiency is improved, but installation complexity increases
Solution Approach 1:
Components are pre-manufactured with features such as score grooves, snap-fit mechanisms, and alignment guides that facilitate easy field assembly. The end pieces and center sections are pre-formed with connection features that simplify the installation process despite requiring multiple components.
Solution Approach 2:
The assembly system incorporates self-aligning and self-securing features such as snap-fit connections and interlocking geometries that allow installers to assemble the components without specialized tools or complex procedures, maintaining ease of operation despite modular construction.
Data Source
AI summary
A variable size sill pan can be adapted to various widths, lengths, and heights of framed door or window openings. The sill pan assembly includes an extruded base which is typically inclined, window or door supports which can be extruded as part of the base unit, and molded corner elements. Grooves are provided on the front flange of the sill pan base to permit the front flange to be cut to a desired length. Grooves are provided on the rear sill pan wall permit the rear sill pan wall to be cut to a desired length. Grooves or markings are provided on a base and on end cap sections to permit the pieces to the cut to a desired width. An assembled sill pan is formed by attaching the adjusted pieces together, or by snapping and gluing the adjusted pieces together.