Infinite-Adjust Seat Post Valve Layout Against Hydrostatic Lock
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Solution Overview
Problem
Conventional seat posts experience hydrostatic lock during extreme conditions, rendering the suspension system temporarily non-functional due to increased pressure in the oil chamber.
Innovation Solution
An infinite adjust seat post with a pressure relief valve that strategically positions a pressure relief valve in series with a spool valve, utilizing two parallel fluid pathways to manage pressure and prevent hydrostatic lock by allowing fluid to flow from one side of the oil chamber to the other, thereby maintaining adjustability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional suspension system uses an incompressible fluid in a sealed oil chamber, then the suspension provides stable support, but the system experiences hydrostatic lock under extreme conditions rendering it non-functional
Solution Approach 1:
The patent extracts the harmful pressure buildup from the sealed oil chamber by introducing a pressure relief valve that allows excess fluid to escape from the oil chamber when pressure exceeds a predetermined threshold, thereby preventing hydrostatic lock while maintaining suspension functionality under normal conditions
Solution Approach 2:
The pressure relief valve acts as an intermediary component between the sealed oil chamber and the external environment, mediating the pressure buildup by opening to release excess pressure and then closing to maintain the sealed environment, thus resolving the contradiction between sealing and pressure relief
2Stability of the object's composition
If the oil chamber is sealed to maintain suspension performance, then the suspension provides consistent damping, but pressure buildup prevents adjustment during extreme conditions
Solution Approach 1:
The pressure relief valve transitions from a closed static state during normal operation to an open dynamic state when pressure exceeds the threshold, allowing the system to adapt between maintaining sealed damping consistency and releasing pressure to restore adjustability under extreme conditions
Solution Approach 2:
The system changes the pressure parameter within the oil chamber by opening the pressure relief valve when pressure exceeds a predetermined threshold, thereby transforming the sealed high-pressure state into a relieved state that allows continued adjustment while maintaining damping consistency during normal operation
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 prevents hydrostatic lock by harnessing increased pressure to actuate the pressure relief valve, ensuring continuous adjustability and functionality of the seat post under various riding conditions.
Implementation Method 1
the portion 'A' of the oil chamber furthest away from the IFP may experience an increase in pressure that causes a condition commonly known as hydrostatic lock
Implementation Method 2
utilizing two parallel fluid pathways to manage pressure and prevent hydrostatic lock by allowing fluid to flow from one side of the oil chamber to the other
Data Source
AI summary
An assembly for enabling continuous seat post function during extreme conditions is described and includes: a first valve at least partially, slidably disposed within a stationary piston and for controlling a first fluid pathway there through, wherein the first fluid pathway runs from a first portion and to a second portion of the oil chamber, wherein the stationary piston separates the oil chamber into the first portion and the second portion; and a second valve at least partially disposed within the stationary piston and disposed in series with the first valve and having a second fluid pathway disposed through the first valve and the second valve, being in parallel with the first fluid pathway, running from the first portion to the second portion of the oil chamber, and providing a bypass for oil to flow from the first portion to the second portion when the first fluid pathway is closed.