Bottle Lid Pressure Relief for Hygienic Gas Injection

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Solution Overview

Problem

Existing systems for introducing gas into liquid containers, such as carbon dioxide into water bottles, suffer from contamination risks, inefficiency in gas usage, and complexity, leading to hygiene issues and significant gas loss.

Innovation Solution

A lid and device system with a gas outlet flow path, pressure relief valve, and adjustable retaining element that allows sealed gas introduction, preventing gas escape and contamination, and enables efficient mixing by deflecting the gas flow direction to minimize vertical forces on the container.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If gas is introduced from above through a bottle opening into a water-filled bottle, then gas can be introduced into the liquid, but contaminants can enter the water via the gas outlet element and regular cleaning is necessary

Engineering Contradiction:
Improvegas introduction operationVSAvoidcontamination of liquid
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the conventional gas introduction approach by introducing gas from the bottom of the container upward through the liquid, rather than from the top downward. This inversion eliminates the need for a gas outlet element that contacts the liquid, thereby preventing contamination while still achieving effective gas introduction and mixing.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent removes the gas outlet element from the liquid environment entirely. By introducing gas through the bottom opening and allowing it to rise through the liquid, the system extracts the harmful component (the outlet element that requires cleaning) from the system, eliminating the contamination risk it posed.

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of operation

If gas is introduced from above through a bottle opening, then gas can be introduced into the liquid, but a portion of the gas typically escapes from the water upwards and then through the bottle opening leading to significant gas loss

Engineering Contradiction:
Improvegas introduction operationVSAvoidgas loss
Core Design Contradiction:
Ease of operationVSLoss of substance

Solution Approach 1:

The patent inverts the gas introduction direction to enter from the bottom and rise upward through the liquid. This inversion ensures that gas is forced through the entire liquid volume and exits through the lid's gas outlet, preventing escape through the bottle opening and eliminating the need for the cap to be tightly closed during operation.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent establishes continuous gas flow through the liquid from bottom to top, with the gas outlet in the lid maintaining continuous pressure relief. This continuous action prevents gas accumulation and escape through the bottle opening, ensuring all introduced gas is utilized effectively for carbonation.

Inventive Principle:
Principle #20Continuity of useful action

3Stability of the object's composition

If known systems fix the cylinder in place during gas introduction to ensure it remains in the intended position, then the cylinder stays stable, but the systems become complex and susceptibility to malfunctions increases

Engineering Contradiction:
Improvecylinder position stabilityVSAvoidsystem complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent employs the container's own structure (bottom opening and lid with gas outlet) to achieve stable gas introduction without requiring external fixing mechanisms. The container itself serves the function of stabilizing the gas introduction process, eliminating the need for additional complex components.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent makes the container lid multi-functional by incorporating both the gas outlet and pressure relief valve functions into a single component. This universal design simplifies the overall system by combining multiple functions that would otherwise require separate components and fixing mechanisms.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 system ensures hygienic gas introduction with minimal loss, allowing efficient mixing and use of gas without the need for locking the container, reducing complexity and enhancing operational efficiency.

Implementation Method 1

a pressure relief valve (97) comprising a valve body (91), wherein the valve body (91) is movable between an open position in which the valve body (91) releases the gas outlet flow path (98) and a closed position in which the valve body (91) closes the gas outlet path (98)

Methodology Applied
Scientific EffectPressure differential: Pressure Gradient

Data Source

PatentEP4467481B1Lid for closing a liquid container, container, system and method for injecting gas in the container
Publication Date: 2026.03.25 KVELL WATER R&D GMBH
  • EP4467481B1 patent drawingFigure 1
  • EP4467481B1 patent drawingFigure 2
  • EP4467481B1 patent drawingFigure 3

AI summary

The invention relates to a lid for closing a liquid container, a liquid container and a system comprising a device for introducing gas, in particular carbon dioxide, and a liquid container, as well as a method for introducing gas into a liquid container.The device includes a lid (90) for closing a liquid container (80), in particular a water bottle, the lid (90) comprising a gas outlet flow path (98) extending through the lid (90), a pressure relief valve (97) comprising a valve body (91), wherein the valve body (91) is movable between an open position, in which the valve body (91) releases the gas outlet flow path (98), and a closed position, in which the valve body (91) closes the gas outlet flow path (98), and an adjusting arrangement (93) comprising a retaining element (93a), wherein the retaining element (93) is designed and arranged to exert a holding force on the valve body (91), by means of which the retaining element (93a) holds the valve body (91) in the closed position.