Oscillating Flow Controller With Dual Pilot Valve Switching
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Solution Overview
Problem
Existing control systems for accumulators, such as those used in therapeutic support surfaces, are costly, bulky, and complicated, often requiring unnecessary programmability that is rarely changed once set.
Innovation Solution
An oscillating flow controller with a housing, first and second valves, and a biasing mechanism that simultaneously biases both valves toward their respective positions, defining pilot chambers and enabling fluid communication through specific ports based on valve positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional control systems with pumps, solenoid valves, and electronic control units are used, then reliable fluid control is achieved, but the system becomes costly, bulky, and complicated
Solution Approach 1:
The patent combines multiple control functions into a single integrated oscillating flow controller. The device merges valve actuation, fluid direction control, and oscillation generation into one compact unit, eliminating the need for separate pumps, solenoid valves, and electronic control units. This consolidation directly reduces system complexity while maintaining reliable fluid control through the unified mechanical-oscillating mechanism.
Solution Approach 2:
The patent replaces electronic and electrical components (pumps, solenoid valves, electronic control units) with a mechanically-driven oscillating system. The oscillation mechanism uses mechanical linkages, cam mechanisms, or spring-based systems to control fluid flow direction, substituting complex electronic control with simpler mechanical timing and actuation that achieves the same reliability without the bulk and cost of electronic systems.
2Adaptability or versatility
If programmable control systems are implemented, then operational flexibility is improved, but the system becomes more complicated and costly
Solution Approach 1:
The patent implements dynamic adaptability through mechanically-adjustable oscillation parameters. The system allows operational flexibility by enabling users to modify oscillation frequency, amplitude, and timing through mechanical adjustments rather than programming. This provides versatility in fluid control patterns while avoiding the complexity of programmable logic, as the system adapts through physical parameter changes instead of software configuration.
3Volume of stationary object
If compact control systems are assembled, then space competition is reduced, but assembly cost and complexity increase
Solution Approach 1:
The patent achieves compactness by merging all control functions into a single integrated housing. The oscillating flow controller combines valve bodies, actuation mechanisms, fluid passages, and control elements into one unified structure that occupies minimal space. This integration eliminates the need for assembling multiple separate components, thereby reducing both the overall volume and the assembly complexity associated with fitting numerous small components into a compact arrangement.
Solution Approach 2:
The patent employs nested arrangements where smaller components are housed within larger structures. The oscillation mechanism, valve elements, and fluid control components are arranged in nested configurations within a single housing, maximizing space utilization while simplifying assembly. This nesting approach allows compact volume without requiring complex precision assembly of multiple external components.
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 provides a less costly, less bulky, and less complicated apparatus for operating accumulators, offering efficient fluid management without the need for frequent parameter changes.
Implementation Method 1
a biasing mechanism configured to simultaneously bias both of the first valve and the second valve toward their respective first positions or toward their respective second positions
Data Source
AI summary
An oscillating flow controller includes a housing, a first valve operable between first and second positions, a second valve operable between first and second positions, and a biasing mechanism configured to simultaneously bias both the first and second valves toward their respective first positions or second positions. The housing, the first valve, and the second valve cooperate to define a first pilot chamber and a second pilot chamber. When the first and second valves are in their respective first positions, they disable fluid flow into the first pilot chamber and out of the second pilot chamber, while enabling fluid flow out of the first pilot chamber and into the second pilot chamber. When the first and second valves are in their respective second positions, they enable fluid flow into the first pilot chamber and out of the second pilot chamber, while disabling fluid flow out of the first pilot chamber and into the second pilot chamber. The first and second valves change state in response to supply of pressurized fluid to the first and second pilot chambers through the first valve.