Offset Orifice Pouch Welds Prevent Fluid Reflux
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing body fluid collection pouches with anti-reflux valves are complex and require advanced manufacturing, involving multiple components and expensive equipment, making them costly and difficult to produce.
Innovation Solution
A body fluid collection pouch with an anti-reflux valve formed by welding two sheets of plastic material along their periphery, where the admission orifice and entrance are offset, and the welds define the admission channel, creating a sub-compartment structure that maintains tightness under pressure and traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple components are used to form the anti-reflux valve, then the valve function is reliable, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the anti-reflux valve function directly into the collection pouch structure by forming the valve from the pouch material itself through welding. The admission channel is created by welding two sheets of plastic material together, eliminating the need for separate valve components. This integration maintains the anti-reflux function while reducing device complexity and the number of parts.
Solution Approach 2:
The welded structure of the admission channel serves multiple functions simultaneously: it creates the fluid passage, forms the anti-reflux mechanism, and provides structural integrity to the pouch. The welds themselves act as both structural joints and functional valve elements, demonstrating multi-functionality that reduces the need for additional specialized components.
2Reliability
If multiple components are assembled to form the anti-reflux valve, then the valve function is reliable, but the manufacturing cost and equipment requirements increase
Solution Approach 1:
By combining the valve function with the pouch structure through welding, the patent eliminates the need for separate valve assembly operations. The same welding process that joins the pouch components also creates the anti-reflux valve, simplifying manufacturing steps and reducing equipment requirements compared to assembling multiple separate valve components.
Solution Approach 2:
The pouch structure itself provides the anti-reflux function through its welded construction. The admission channel's geometry and the weld configurations inherently create the valve mechanism, allowing the structure to serve its own functional requirements without requiring additional specialized components or complex assembly processes.
3Device complexity
If the admission orifice and entrance are aligned, then the structure is simple, but the pouch cannot maintain tightness under pressure and traction
Solution Approach 1:
The patent introduces asymmetry in the positioning of the admission orifice and entrance relative to each other. This offset arrangement, combined with specific weld configurations, creates a structure that maintains tightness under pressure and traction forces. The asymmetric geometry prevents direct alignment that would compromise the valve function, while the welded connections provide structural integrity.
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 simplifies manufacturing by integrating the anti-reflux valve into the pouch's design, ensuring hermetic closure and preventing fluid reflux even when the pouch is turned upside-down or subjected to stress, thus reducing production costs and complexity.
Implementation Method 1
said welds of said admission channel define the internal limits of said collection compartment, said admission channel opens into said collection compartment distant from the lateral walls of the collection pouch
Implementation Method 2
said admission orifice and said entrance to said collection compartment are offset, in particular axially, in relation to one another
Data Source
Figure 1
AI summary
The invention relates to a collection pouch (1) for bodily fluids, comprising in particular welds (7, 8) forming an anti-reflux valve. Said collection pouch (1) comprises in addition an entrance (6) to a collection compartment (3) and an admission orifice (4) that are offset. The device has a direct application in medical care.