Mechanical Faucet Hydraulic Damper for Consistent Flow Timing
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Solution Overview
Problem
Aircraft lavatory faucets face issues with inconsistent water flow timing and premature corrosion due to varying water quality and Foreign Object Debris (FOD), which affect the reliability and longevity of mechanical faucets.
Innovation Solution
A mechanical faucet design incorporating a hydraulic damper assembly isolated from the water path, using a piston and biasing member to control timing with minimal variation, and a sealing mechanism to prevent contamination and corrosion, ensuring consistent performance and extended lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If water flow is used to control timing in mechanical faucets, then the faucet can operate mechanically without additional power sources, but the timing becomes inconsistent and the system is susceptible to corrosion and FOD contamination
Solution Approach 1:
The patent divides the faucet into two separate chambers: a wet chamber containing the water flow path and a dry chamber containing the timing mechanism. This segmentation isolates the timing mechanism from water exposure, eliminating corrosion and FOD contamination while maintaining mechanical operation. The timing mechanism uses a piston and biasing member that operate in air,不受 water quality variations affecting timing consistency.
Solution Approach 2:
The patent introduces a stopper as an intermediary component that transfers the timing control function from the water flow path to the main valve shaft. The stopper mechanically links the piston movement in the dry chamber to the main valve operation, allowing the timing mechanism to control water flow timing without being exposed to water. This intermediary enables reliable timing control while maintaining mechanical operation.
2Productivity
If the timing mechanism is exposed to water flow, then it can directly control water flow timing, but it becomes susceptible to corrosion and Foreign Object Debris (FOD) contamination
Solution Approach 1:
The patent segments the faucet into a wet chamber for water flow and a dry chamber for the timing mechanism. The timing mechanism including the piston and biasing member operates in the dry chamber, completely isolated from water exposure. This eliminates corrosion and FOD contamination while the stopper efficiently controls water flow timing through mechanical linkage.
Solution Approach 2:
The stopper serves as an intermediary that transfers timing control from the protected timing mechanism to the water flow path. The piston movement in the dry chamber actuates the stopper, which then controls the main valve shaft to regulate water flow. This intermediary arrangement maintains productive flow control while protecting the timing mechanism from harmful water exposure.
3Adaptability or versatility
If unlimited variations in water quality are allowed, then the faucet can handle diverse water sources, but it introduces Foreign Object Debris (FOD) and accelerates corrosion
Solution Approach 1:
The patent segments the system so that the timing mechanism operates in a dry chamber isolated from water quality variations. The wet chamber handles diverse water sources including those with FOD, while the dry chamber contains the precision timing components. This segmentation allows the faucet to adapt to various water sources without compromising timing mechanism reliability or longevity.
Solution Approach 2:
The patent extracts the timing mechanism from the water environment and places it in a separate dry chamber. This extraction removes the timing mechanism from exposure to water quality variations and FOD, allowing the faucet to handle diverse water sources while protecting the critical timing components from corrosion and contamination, thereby extending faucet longevity.
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 hydraulic damper assembly maintains consistent timing and prevents contamination, reducing manufacturing concerns and extending the faucet's life cycle by isolating the timing mechanism from water-related issues like corrosion and FOD.
Implementation Method 1
A mechanical faucet design incorporating a hydraulic damper assembly isolated from the water path, using a piston and biasing member to control timing with minimal variation
Data Source
AI summary
A faucet includes a faucet housing defining a mixing chamber and a dry chamber, a valve assembly, and a damper assembly. The valve assembly includes a main shaft having a first end and a second end, a knob coupled to the first end, a mixing plate coupled to the second end, a main seal coupled to the main shaft, and a first biasing member disposed around the main shaft. The first end is disposed within the mixing chamber and the second end is disposed within the dry chamber. The damper assembly includes an outer cylinder disposed within the dry chamber, a piston extending at least partially into the outer cylinder, and a second biasing member disposed within the outer cylinder. The piston has an interference surface configured to contact the knob, and the second biasing member is configured to bias the piston.