Drink Bladder Magnetic Closure for Pressure-Resistant Sealing

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Solution Overview

Problem

Existing closure devices for drinking bladders are not perceived as innovative or comfortable in handling and may fail to secure against inadvertent opening due to increased internal pressure, leading to potential separation of closure parts.

Innovation Solution

A closure device with magnetically attracting first and second closure parts that can be folded or rolled into a closed position, secured by a mechanism that counteracts shear and lifting forces, using magnetic and mechanical interactions to maintain the closed state.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a magnetic closure device is used, then the closure is secured against inadvertent opening, but the device complexity increases

Engineering Contradiction:

Improvesecuring against inadvertent openingVSAvoidclosure device structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces traditional mechanical closure mechanisms (screws, clips, latches) with a magnetic closure system. The magnetic attraction force between the first and second closure parts provides the securing action, eliminating the need for complex mechanical interlocking components while maintaining reliability against inadvertent opening.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes magnetic field strength as a controllable parameter to achieve reliable closure. By adjusting the magnetic properties and positioning of the closure parts, the system achieves sufficient holding force to prevent inadvertent opening while maintaining a relatively simple structure.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If a securing mechanism is added to counteract increased internal pressure, then the reliability improves, but the device complexity increases

Engineering Contradiction:

Improveresistance to increased internal pressureVSAvoidsecuring mechanism structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs the magnetic attraction force as a counteracting force against the harmful effect of increased internal pressure. The magnetic force acts in opposition to the pressure-induced separation force, maintaining the closed state without requiring additional mechanical counterbalancing mechanisms.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

Instead of using mechanical securing elements like clips or latches to resist internal pressure, the patent relies on the magnetic field to provide the necessary holding force. This substitution eliminates complex mechanical pressure-resisting structures while maintaining reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If the closure parts are designed to be folded or rolled, then the ease of operation improves, but the structural stability may worsen

Engineering Contradiction:

Improvemanual folding or rollingVSAvoidstructural stability of closure parts

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent designs the closure parts to be dynamically configurable - they can be folded or rolled for opening operations, then maintained in a stable closed position by magnetic attraction. The system transitions between dynamic (openable) and static (secured) states, combining ease of operation with structural stability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent replaces rigid, fixed-structure closure parts with flexible, foldable or rollable components. The magnetic force provides the stabilizing effect that would otherwise require rigid mechanical structures, enabling the closure parts to be both easily operable and structurally stable when closed.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 inadvertent opening of the closure device under increased internal pressure, ensuring secure sealing and easy manual release when desired.

Implementation Method 1

the first closure part and the second closure part cooperate in a magnetically attracting manner in such a way that in a closed position of the closure device the first closing portion and the second closing portion rest against each other

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS12357077B2Drink bladder with magnetic closure device

Publication Date: 2025.07.15 FIDLOCK GMBH

AI summary

Provided is a drinking bladder, including a hollow body for receiving a liquid, which includes a closure device with a closure compound. The closure compound can be adjusted from a release position, in which the first and second closing portions can be properly separated from each other against a magnetic force applied by first and second closure parts to clear an opening on the hollow body, by folding or rolling the first and second closing portions at least once into a closing position. The closure compound disposed in its closing position is secured via a securing mechanism.