Dental Suction Valve Assembly With Backflow Prevention
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Solution Overview
Problem
Current suctioning devices in medical and dental settings face challenges in preventing cross-contamination between patients due to the backflow of contaminants from vacuum lines, which can reintroduce saliva, blood, and other fluids into new patients, despite the use of disposable distal ends and lack of regular valve replacement.
Innovation Solution
A valve assembly for dental suction systems featuring a rotatable valve plug and a backflow prevention device, which includes a flexible and resilient material to control fluid flow independently of the valve plug's operation, ensuring effective prevention of backflow by positioning the backflow prevention device between the valve plug and the inlet or outlet, and utilizing a fluid flow path with varying centerlines to enhance sealing and flow control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a permanent on/off valve is used in the suction system, then device complexity is reduced and ease of operation is improved, but cross-contamination risk increases due to contaminants flowing by gravity through the system
Solution Approach 1:
The valve assembly is divided into disposable components (valve body, valve plug, backflow prevention device) that can be replaced between patients. This segmentation allows the permanent vacuum system to remain while the potentially contaminated valve components are discarded, resolving the contradiction between operational simplicity and contamination prevention.
Solution Approach 2:
The valve assembly is designed as a disposable component that is replaced between patients. This allows the system to maintain simple operation with a permanent vacuum system while eliminating cross-contamination risks by discarding components that may have been exposed to contaminants.
2Object-affected harmful factors
If disposable distal ends are changed between patients, then cross-contamination is reduced at the distal end, but contaminants can still backflow from the vacuum line into the new distal end
Solution Approach 1:
The backflow prevention device is pre-installed in the valve assembly before use. This preliminary action ensures that contaminants cannot backflow from the vacuum line into the distal end, addressing the limitation of simply changing distal ends without modifying the vacuum line or valve.
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 effectively minimizes the risk of cross-contamination by ensuring that contaminants are blocked from flowing back into the system, maintaining sterility and safety between patients, and allowing for easy assembly and disposal of components to maintain hygiene.
Implementation Method 1
The backflow prevention device may include a resilient, flexible member having a peripheral portion fixed relative to the valve body. The backflow prevention device is movable between open and closed positions to control fluid flow through the fluid flow path independent of operation of the valve plug.
Data Source
AI summary
A valve assembly for a dental suction system. The valve assembly includes a valve body having an inlet, an outlet and a fluid flow path extending between the inlet and the outlet. The valve assembly also includes a valve plug positioned at least partially within the valve body and including a through-passage. The valve plug is rotatable relative to the valve body to selectively alter a flow of fluid along the fluid flow path. The fluid flow path exhibits a varied cross-sectional area along a length of the fluid flow path.