Shuttle Valve Poppet Mechanism With Over-Center Compliant Detent
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Solution Overview
Problem
Shuttle valves with complex detent mechanisms are prone to wear and tear, leading to decreased operational efficiency and increased manufacturing costs due to multiple parts.
Innovation Solution
A compliant poppet mechanism using a compliant member that alternates forces in opposite directions between two positions, facilitated by an over-center spring mechanism, allowing precise shuttling between inlet ports and an outlet port based on fluid pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detent mechanism with multiple parts is used to hold and shuttle the poppet, then the valve can maintain position and switch between ports, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent combines the detent mechanism components into a single integrated poppet structure. The poppet includes integrated features such as the stem, head, and detent elements formed as one piece, eliminating the need for separate detent springs, balls, and housing components. This merging reduces part count while maintaining the position-holding function through geometric interlocking features built into the poppet itself.
Solution Approach 2:
The patent extracts the complex spring-based detent mechanism and replaces it with a simplified geometric detent system. The detent function is achieved through shaped recesses and protrusions on the poppet that engage with corresponding features in the valve body, removing the need for separate springs and detent balls while maintaining reliable position holding.
2Reliability
If a detent mechanism with multiple parts is used to hold and shuttle the poppet, then the valve can maintain position and switch between ports, but the manufacturing cost increases
Solution Approach 1:
The patent combines the detent mechanism components into a single integrated poppet structure. The poppet includes integrated features such as the stem, head, and detent elements formed as one piece, eliminating the need for separate detent springs, balls, and housing components. This merging reduces part count while maintaining the position-holding function through geometric interlocking features built into the poppet itself.
Solution Approach 2:
The patent employs a simplified poppet design that can be manufactured as a low-cost disposable or replaceable component. By using a single-piece construction with geometric detents rather than complex assembled mechanisms, the poppet becomes more economical to manufacture and can be easily replaced if worn, reducing overall system cost.
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
This solution provides a cost-effective and efficient fluid flow control mechanism with reduced mechanical complexity, ensuring smooth and controlled shuttling of the poppet and extended valve life.
Implementation Method 1
a first compliant member connecting the poppet structure to an inner wall of the chamber, and configured to alternate application of forces to the poppet structure, in opposite directions, between the first position and the second position
Implementation Method 2
a threshold level of fluid pressure generated by fluid flow from the first port
Data Source
AI summary
An apparatus for directing fluid flow is disclosed, including a valve structure having a chamber, a main port, a first port, and a second port, each of the ports being connected to the chamber. A poppet structure in the chamber is moveable between a first position blocking the first port and a second position blocking the second port. A first compliant member connecting the poppet structure to an inner wall of the chamber, is configured to alternate application of forces to the poppet structure, in opposite directions, between the first and second positions.