Conical Check Valve Filtration to Prevent Backcheck Leaks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional check valves lack filtering capabilities and are prone to backcheck leaks, which can allow particulate matter to pass through, potentially causing damage or affecting the delivery of IV solutions in medical settings.
Innovation Solution
A conical check valve design featuring a flexible valve member and filtering grooves on the outer perimeter of the upper housing, which selectively permits fluid flow in one direction while preventing backflow and filtering out particulate matter by deflecting under pressure to restrict reverse fluid communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional disc-shaped valve members are used, then the check valve structure is simple, but the valve lacks filtering capabilities and is prone to backcheck leaks
Solution Approach 1:
The patent employs a conical valve member with a curved surface instead of a conventional flat disc shape. The conical geometry with its curved surface provides better sealing contact against the seating surface, minimizing backcheck leaks while maintaining structural simplicity. The curvature allows for more effective pressure distribution and sealing.
Solution Approach 2:
The patent integrates filtering grooves directly into the housing structure, merging the filtering function with the valve body. This combination eliminates the need for separate filtering components while providing particulate matter filtration capability, thus improving reliability without significantly increasing overall device complexity.
2Reliability
If conventional flat valve members are used, then manufacturing is easier, but particulate matter cannot be filtered
Solution Approach 1:
The patent integrates filtering grooves directly into the housing structure, merging the filtering function with the valve body. This combination eliminates the need for separate filtering components while providing particulate matter filtration capability, thus improving reliability without significantly increasing overall device complexity.
Solution Approach 2:
The filtering grooves are strategically positioned in specific locations within the housing to capture particulate matter. The conical valve member also has specific surface characteristics in contact regions that enhance filtering. This localized approach provides effective filtration without requiring the entire valve structure to be complex.
3Reliability
If the valve member is made flexible to deflect under pressure, then backflow prevention is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs a flexible valve member that can deflect under pressure differential. This flexibility allows the valve to automatically respond to flow conditions, sealing effectively during backflow conditions while maintaining open position during forward flow. The flexible material accommodates manufacturing tolerances better than rigid materials.
Solution Approach 2:
The conical shape with curved surface provides gradual stress distribution during deflection, reducing stress concentration points. This geometric feature allows the flexible valve member to withstand repeated deflection cycles while maintaining sealing effectiveness, thereby reducing the impact of manufacturing variations on overall performance.
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 filters out particulate matter and minimizes backcheck leaks, ensuring reliable and accurate delivery of IV solutions by allowing only filtered fluid to pass through while preventing reverse flow, thus maintaining the integrity of the fluid pathway.
Implementation Method 1
When an upstream pressure is applied to the flexible valve member, the flexible valve member is configured to deflect away from the sealing surface to fluidly communicate the inlet and the cavity and when a downstream pressure is applied to the flexible valve member, the flexible valve member is configured to deflect towards the sealing surface to block the fluid communication between the inlet and the cavity
Implementation Method 2
plurality of filtering grooves on an outer perimeter of the core of the upper housing... effectively filters out particulate matter
Data Source
AI summary
A check valve includes an upper housing defining an inlet of the check valve, a lower housing defining an outlet of the check valve, and a cavity interposed between and defined by the upper and lower housings for fluidly connecting the inlet and the outlet. The check valve further includes a valve member mounted in the cavity to selectively permit fluid flow in a first direction, and prevent fluid backflow in a second direction opposite to the first direction. The valve member includes a valve body and a valve stem portion extending axially through a central axis of the valve body. The valve member may further include a plurality of feet disposed about and extending longitudinally from an outer circumferential perimeter of the valve body.