Automatic Tire Deflator Valve Venting for Faster, Quieter Pressure Setting
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Solution Overview
Problem
Existing automatic deflator valves suffer from inaccurate, unreliable, and repeatable destination pressure settings due to tolerance-related leakage and backpressure forces, leading to longer deflation times and noise.
Innovation Solution
The deflator valve incorporates an O-ring around the piston to reduce air leaks, and features skewed, slotted, or irregularly shaped exhaust vents and input ports to enhance airflow efficiency, resulting in faster deflation, reduced noise, and improved pressure adjustment accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional straight exhaust vents and input ports are used, then the structure is simple, but the deflation time is long and noise is high
Solution Approach 1:
The exhaust vents are designed with skewed angles relative to the sidewall, creating asymmetric airflow paths that generate vortex-like flow patterns. This asymmetry accelerates air evacuation and reduces noise compared to traditional straight vents, directly resolving the contradiction between simple structure and fast deflation.
Solution Approach 2:
The skewed exhaust vents create curved airflow paths within the piston cavity, transforming linear flow into rotational vortex flow. This curvature in the flow path enhances deflation efficiency and noise reduction while maintaining relatively simple vent geometry.
2Ease of operation
If standard threaded attachment is used, then the connection is secure, but the attachment and removal time is long
Solution Approach 1:
The attachment system is segmented into distinct functional elements: a lock chuck with gripping surfaces for secure attachment, and a quick-release mechanism for rapid detachment. This segmentation allows the valve to achieve both secure connection and fast operation that traditional monolithic threaded designs cannot provide.
Solution Approach 2:
The attachment mechanism transitions from static threaded connection to dynamic lock chuck engagement with spring-loaded gripping surfaces. This dynamic system provides secure attachment during use while enabling rapid release, resolving the contradiction between connection security and attachment speed.
3Measurement precision
If tolerance-related leakage paths are present, then manufacturing is easier, but the destination pressure accuracy is poor
Solution Approach 1:
An O-ring seal is introduced as an intermediary element between the piston and piston cavity wall, compensating for manufacturing tolerances and clearance variations. This seal eliminates leakage paths that would otherwise compromise pressure accuracy, allowing easier manufacturing while maintaining high measurement precision.
Solution Approach 2:
The system changes the sealing parameter from relying on tight mechanical clearances to using elastomeric O-ring deformation. This parameter change allows larger manufacturing tolerances while maintaining accurate destination pressure control, as the O-ring adapts to clearance variations through elastic deformation.
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 achieves faster deflation times, reduced noise, and more accurate and repeatable destination pressure settings, addressing the limitations of existing deflator valves.
Implementation Method 1
an O-ring around the piston to reduce air leaks
Implementation Method 2
skewed, slotted, or irregularly shaped exhaust vents and input ports to enhance airflow efficiency, resulting in faster deflation, reduced noise
Data Source
AI summary
An improved deflator valve for reducing deflation time. The deflator valve has a main body with one or more ports, one or more vents, or port or vent slots for introducing air into or relieving pressure from within the main body in a vortex, circular flow. The deflator valve also includes a piston having an O-ring disposed around an outer circumference of the piston. The O-ring of the piston and the ports and vents are effective for reducing noise and deflation time and improving accuracy and ease of adjusting a pressure setting. The deflator valve can further include a dual or variable rate spring that can achieve an extensive destination pressure range. The deflator valve can also include a threadless lead in, fewer valve stem threads, or a lock chuck for enhanced valve stem attachment methods.