L-Shaped Storm Drain Filter Frame with Slidable Retention
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Solution Overview
Problem
Existing storm drain sediment filters with retaining ends on L-shaped members are prone to damaging the filter material, particularly geotextile fabrics, during use.
Innovation Solution
A storm drain sediment filter with a frame of four L-shaped rigid members that are slidably engaged using spaced apart retaining members without distal retaining ends, limiting the dimensions to maintain engagement and prevent withdrawal, thus protecting the filter material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If retaining ends are formed at the distal end of L-shaped members to prevent separation, then the frame structure stability is improved, but the filter material is damaged
Solution Approach 1:
The patent removes the harmful retaining ends from the distal ends of the L-shaped members while maintaining the slidable engagement mechanism through retaining members. This extraction eliminates the source of filter material damage while preserving the structural stability through the alternative retention mechanism.
Solution Approach 2:
The patent introduces retaining members as intermediary components that provide the necessary retention function without the harmful effects of retaining ends. These retaining members engage with the L-shaped members to prevent separation while avoiding direct contact with and damage to the filter material.
2Adaptability or versatility
If the frame dimensions are made adjustable to accommodate various catch basin sizes, then the adaptability is improved, but the structural complexity increases
Solution Approach 1:
The patent employs slidable engagement between L-shaped members that allows the frame dimensions to be dynamically adjusted. The retaining members enable the L-shaped members to slide relative to each other, providing adaptability for different catch basin sizes while maintaining a relatively simple structural design.
Solution Approach 2:
The frame is divided into multiple L-shaped members that can be independently positioned and adjusted. This segmentation allows each member to be moved to achieve the desired frame dimensions, providing versatility without requiring a completely complex reconfigurable structure.
Data Source
AI summary
A storm drain sediment filter that can be adapted to cover a catch basin and be held in place by a perforated grate. In one embodiment, the filter includes a frame including four L-shaped rigid members, each of which is provided with at least two spaced apart retaining members. The four L-shaped rigid members are arranged such that a rectangular frame is formed having a total of four overlapping sections. The retaining members engage one of the overlapping portions of the frame but slidably receives the other. No retaining ends are formed at the distal end of the slidably engaged L-shaped members to serve as a sliding boundary. Instead, the dimensions of the filter bag are such that the filter bag serves to define the maximum dimension of the frame and thereby maintain the overlapping L-shaped rigid members in slidable engagement with each other. A circular embodiment is also disclosed.