Bypass Water Filter Valve Structure to Prevent O-Ring Wear

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Solution Overview

Problem

The structural design of existing bypassing-filtration devices leads to frequent wear and tear of the O-ring in the altering plug, resulting in water leakage and the need for replacing the entire device, increasing maintenance costs.

Innovation Solution

A water-filtration device with a guiding assembly and adjusting valve that includes a conical tip and O-ring, allowing the O-ring to contact or move away from a tapered recess to control the bypassing-filtration path, preventing wear and leakage without replacing the entire device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the altering plug with O-ring is used to control the bypassing-filtration path, then the water filtration device can maintain water taste by keeping minerals, but the O-ring is rubbed by edges of altering holes during adjustment, leading to wear and water leakage

Engineering Contradiction:

Improvewater taste maintenanceVSAvoidO-ring durability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent extracts the harmful interaction between the O-ring and altering holes by removing the O-ring from the adjusting assembly. Instead of using an altering plug with O-ring that must be inserted into and removed from altering holes, the invention uses a rotating valve body with bypass holes that are always open, eliminating the wear-causing insertion/extraction motion while maintaining the ability to control bypass flow.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent inverts the control mechanism from linear insertion/extraction (altering plug moving in and out) to rotational motion (valve body rotating). This inversion changes the interaction from frictional rubbing against hole edges to sealing surface contact, dramatically reducing wear on the sealing element.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If the altering plug depth is controlled to adjust bypassing flow, then water can pass through main-filtration path and bypassing-filtration path, but frequent adjustment causes O-ring wear and requires replacing the entire device

Engineering Contradiction:

Improvebypassing flow adjustmentVSAvoiddevice replacement cost

Core Design Contradiction:

Ease of operationVSEase of repair

Solution Approach 1:

The patent implements a dynamically adjustable rotating valve body that can be easily rotated to different positions to control bypass flow. This dynamic rotational adjustment mechanism is more durable and easier to maintain than the static altering plug system, as it allows continuous adjustment without wear-prone insertion and removal operations.

Inventive Principle:

Principle #15Dynamics

3Reliability

If the O-ring prevents water leakage by sealing altering holes, then the bypassing-filtration path can be controlled, but the O-ring rubbing against altering hole edges during adjustment leads to wear and leakage

Engineering Contradiction:

Improvewater leakage preventionVSAvoidO-ring service life

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent introduces a water guide member as an intermediary component that redirects water flow away from the sealing surface of the valve body. This intermediary structure prevents water from directly contacting and potentially degrading the sealing surface, thereby extending the service life of the sealing element while maintaining effective leakage 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

Prevents O-ring wear by blocking the bypassing-filtration path, reducing maintenance needs and saving costs by ensuring the O-ring does not rub against edges, thus maintaining effective filtration without frequent replacements.

Implementation Method 1

The adjusting valve is operable to make the O-ring contact or move away from the cooperating recess of the bypassing portion, thereby closing or opening the bypassing-filtration path

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

impurities and minerals in water are filtrated away by the filter material

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 3

water passes through the filter material inside the water filter

Methodology Applied

Scientific EffectPhysical filtration: Filter (physical)

Data Source

PatentUS12515151B2Water-filtration device

Publication Date: 2026.01.06 CAWARE FILTERING CORP

AI summary

A water-filtration device filtrates water, has a main-filtration path and a bypassing-filtration path, and comprises a filter head, a water filter, a guiding assembly and an adjusting valve movably mounted at the filter head. The guiding assembly is mounted at the filter head and connected to the water filter. An O-ring of the adjusting valve can block an end of a bypassing portion of the guiding assembly. In the main-filtration path, water entering from a water inlet of the filter head does not pass through the bypassing portion, thereby completely passing through filter materials in a first filtrating room and a second filtrating room of the water filter. Water in the bypassing-filtration path passes through the bypassing portion and the filter material in the first filtrating room. The O-ring does not reach into the bypassing portion, thereby reducing wear and damage to the O-ring, and avoiding water leakage.