Manual Pneumatic Pump Stopper Body for Smooth Float Operation

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Solution Overview

Problem

Conventional manual/pneumatic pumps face difficulties in ensuring smooth movement of the float member when the fuel collection space communicates with the atmosphere, as the higher pressure on the sealing washer hinders its unblocking, making it hard for the float member to drop under gravity, leading to inefficient fuel pumping.

Innovation Solution

The manual/pneumatic pump structure incorporates a stopper body with a movement space and a control section that automatically blocks or unblocks the outlet passage, allowing communication with the atmosphere only when necessary, ensuring smooth operation in both manual and pneumatic modes by isolating the internal passage from the atmosphere and using a valve assembly with a float member to maintain a low-pressure state.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the float member moves upward and the sealing washer blocks the bottom opening of the intake, then the fuel collection space is sealed from the atmosphere, but the higher pressure on the sealing washer hinders it from unblocking, making it hard for the float member to drop under gravity

Engineering Contradiction:

Improvesealing effectivenessVSAvoidfloat member movement smoothness

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent divides the sealing function into two separate components: the float member with sealing washer for blocking the intake opening, and the stopper body for blocking the outlet passage. This segmentation allows each component to perform its specific function independently, preventing the pressure buildup that hinders float member movement in the conventional design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts the outlet passage blocking function from the float member assembly and creates a separate stopper body mechanism. By removing this function from the float member, the sealing washer only needs to handle the intake opening sealing, reducing the pressure resistance it must overcome and ensuring smooth float member operation.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If the outlet passage remains open to the atmosphere, then the float member can move freely, but during pneumatic operation the atmosphere can enter the fuel collection space causing backflow

Engineering Contradiction:

Improvefloat member movement freedomVSAvoidprevention of backflow

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The stopper body is designed to dynamically switch between blocking and unblocking the outlet passage based on operational needs. During pneumatic operation, it blocks the passage to prevent backflow; during manual operation or when fuel collection is complete, it unblocks to allow atmosphere communication and float member movement.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The stopper body acts as an intermediary component between the outlet passage and the atmosphere. It controls the flow of air into the fuel collection space, allowing atmosphere communication when needed while preventing unwanted backflow during pneumatic operation, thus mediating between the conflicting requirements.

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

This design ensures smooth manual operation by blocking the pneumatic gas-sucking flow way and prevents backflow during pneumatic operation, maintaining a low-pressure state in the fuel collection space, thus preventing over-pumping and ensuring efficient fuel collection.

Implementation Method 1

a Venturi tube section (42) positioned in the main body

Methodology Applied

Scientific EffectVenturi effect: Venturi Effect

Implementation Method 2

the float member 92 moves upward due to the buoyancy

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 3

the stopper body is movable within the movement space between a blocking position and an unblocking position

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentUS8360741B2Manual/pneumatic pump structure

Publication Date: 2013.01.29 CHUANG CHIA CHIUNG

AI summary

A manual/pneumatic pump structure includes: a barrel member having a barrel body defining a fuel collection space; a cover body disposed on the barrel body for sealing the fuel collection space; a pneumatic gas-sucking member having a main body disposed on the cover body and a Venturi tube section positioned in the main body, an inlet passage being formed in the main body in communication with an inlet of the Venturi tube section, an outlet passage being formed in the main body with a first end in communication with an outlet of the Venturi tube section, a second end of the outlet passage being permissible to communicate with the atmosphere; and an isolation section for isolating internal passage of the pneumatic gas-sucking member from the atmosphere. The isolation section has a movement space within which a stopper body is movable between a blocking position and an unblocking position.