Furniture Riser Moat Barrier for Bedbug Trapping
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Solution Overview
Problem
Existing barrier devices for preventing crawling arthropods like bedbugs from accessing furniture are ineffective as they often fail to trap the insects and allow them to escape or circumvent the protection, using smooth surfaces and other routes such as bed sheets or drapery.
Innovation Solution
A barrier device with a riser and moat system, where the riser has a smooth surface and an angled design with a moat filled with a non-toxic fluid, coated with a slippery substance, and optionally colored to attract arthropods, combined with a lighting element and pheromones to enhance trapping efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pit fall trap with smooth interior walls is used, then the device is simple to manufacture, but crawling arthropods can escape by using debris or tarsal hooks to climb out
Solution Approach 1:
The interior surface of the containment structure is modified with a specific roughness profile (0.05-0.50 microns RMS) to prevent arthropod escape, while maintaining overall structural simplicity. This localized surface treatment creates a friction-based barrier that stops insects without requiring complex mechanical features.
Solution Approach 2:
The surface roughness parameter is precisely controlled within a specific range (0.05-0.50 microns RMS) to optimize the balance between preventing escape and maintaining ease of manufacture. This parameter change transforms a simple smooth surface into an effective anti-escape barrier.
2Device complexity
If a pit fall trap with sharp drop is used, then the device structure is simple, but crawling arthropods do not voluntarily drop into the confinement area and find alternative routes
Solution Approach 1:
The device proactively creates a fluid barrier and applies surface treatments before arthropods can escape or find alternative routes. The fluid layer is pre-positioned in the moat, and surface roughness is pre-applied to containment walls, preventing escape attempts before they succeed.
Solution Approach 2:
A fluid layer acts as an intermediary barrier between the containment structure and the external environment, preventing arthropods from climbing out while maintaining the simple pit fall geometry. The fluid mediates the interaction between the smooth containment walls and the arthropods.
3Ease of operation
If furniture accessories like bed sheets are allowed to contact both furniture and floor, then the furniture remains accessible and comfortable, but crawling arthropods can use these accessories to circumvent the protector
Solution Approach 1:
The protection extends from a two-dimensional surface barrier to a three-dimensional barrier by raising the furniture on legs and creating a moat-filled space underneath. This vertical dimension change prevents arthropods from using horizontal paths like bed sheets to bypass the protection.
Solution Approach 2:
The potential escape route through furniture accessories is eliminated by removing the continuous contact path between floor and furniture. The moat and riser structure extracts the arthropod access path from the system, forcing accessories to either not contact the furniture or to contact only protected surfaces.
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
Effectively prevents crawling arthropods from accessing furniture by trapping them in the moat, preventing escape and circumvention, while maintaining stability and attractiveness to the pests.
Implementation Method 1
A moat wall is attached in a watertight way to the riser bottom edge. The moat wall is high enough to create a moat of no less than 3 inches in depth
Implementation Method 2
The riser side surface, moat wall outer surface, and moat wall inner surface have a surface roughness of 0.9 microns or less. The riser side surface is coated with a slippery substance
Implementation Method 3
The side surface forms an angle between 60 and 90 degrees with a horizontal plane, in such a way that the cross-sectional area of the bottom edge is larger than the area of the top surface
Data Source
AI summary
A barrier device to prevent crawling arthropods such as bedbugs from accessing an item of furniture, said barrier device comprising a furniture riser, a deep fluid-filled moat, and a smooth wall around the moat.