Rotatable Pressure Gauge Assembly for Air Inflation Backflow Control

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Solution Overview

Problem

Conventional air inflation devices face difficulties in assembling check valves, which are troublesome due to the need for airtight insertion, complicating the assembly process.

Innovation Solution

An air inflation device with a rotatable pressure gauge unit and a check valve sleeved on a shaft, allowing flexible insertion into the air outlet channel, enabling the check valve to move between open and closed states to prevent backflow of high pressure air.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a check valve is airtightly inserted into the bottom seat or cylinder during assembly, then the high pressure air is effectively prevented from flowing back into the chamber, but the assembly process becomes very troublesome and inconvenient

Engineering Contradiction:

Improvebackflow preventionVSAvoidassembly convenience

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The check valve assembly is segmented into modular components: a check valve body with an elastic element, a sealing ring, and a shaft. This segmentation allows the check valve to be assembled by simply inserting the shaft into the air outlet channel without requiring complex airtight fitting procedures, thus improving assembly convenience while maintaining backflow prevention functionality through the elastic sealing mechanism

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A sealing ring is introduced as an intermediary element between the check valve body and the air outlet channel. This sealing ring provides the necessary airtight seal without requiring the check valve itself to be tightly fitted into the channel, simplifying the assembly process while ensuring reliable backflow prevention

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Simplifies the assembly process and effectively prevents high pressure air from flowing back into the chamber, improving the usability and efficiency of the air inflation device.

Implementation Method 1

a check valve sleeved on the shaft and flexibly inserted into the air outlet channel

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a closed state for preventing the high pressure air in the air outlet channel to flow back into the chamber

Methodology Applied

Scientific EffectPressure differential: Pressure Gradient

Data Source

PatentUS11512685B2Air inflation device having rotatable pressure gauge

Publication Date: 2022.11.29 BETO ENG & MARKETING

AI summary

An air inflation device includes an inflation unit having a chamber in which air can be compressed to generate a high pressure air, and an air outlet channel communicating with the chamber. A pressure gauge unit includes a pressure gauge, a shaft extending outwardly from the pressure gauge and inserted into the air outlet channel, and a check valve sleeved on the shaft and movable between an open state for allowing the high pressure air in the chamber to flow into the air outlet channel, and a closed state for preventing the high pressure air in the air outlet channel to flow back into the chamber. An air guide unit is connected to the inflation unit for guiding the high pressure air to flow out of the air outlet channel.