Nested Liquid Reservoirs for Rigid Container Volume Optimization

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Solution Overview

Problem

Existing liquid dispensing and recovery systems in rigid containers are complex and inefficient, lacking in practicality and convenience during manufacturing and use, with limited storage volume and rigidity issues.

Innovation Solution

A system comprising two reservoirs with casings that change configuration from inflated to contracted based on liquid volume, allowing nested storage without volume increase, featuring flexible panels for convexity reversal and maintaining overall rigidity, along with a pump and pipe system for efficient liquid distribution and recovery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If traditional expandable tanks with separation discs and springs are used, then liquid storage capacity is achieved, but device complexity increases and manufacturing becomes difficult

Engineering Contradiction:
Improveliquid storage capacityVSAvoiddevice complexity
Core Design Contradiction:
Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent implements nesting by placing the recovery tank inside the distribution tank when the distribution tank is empty. The contracted recovery tank fits within the expanded distribution tank volume, eliminating the need for separate tank compartments and complex separation mechanisms while maximizing space utilization in the rigid container.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The system divides the liquid handling function into two separate tanks (distribution tank and recovery tank) that operate independently but share the same container space. This segmentation allows each tank to be optimized for its specific function while the nesting arrangement prevents the overall device complexity from increasing.

Inventive Principle:
Principle #1Segmentation

2Strength

If rigid container structure is used, then structural integrity is maintained, but storage volume efficiency decreases

Engineering Contradiction:
Improvestructural integrityVSAvoidstorage volume efficiency
Core Design Contradiction:
StrengthVSVolume of stationary object

Solution Approach 1:

The patent introduces dynamic flexibility within the rigid container by using flexible tanks that can expand and contract based on their liquid content. The distribution tank expands when full and contracts when empty, allowing the rigid container to maintain its structural integrity while the internal tanks dynamically adjust their volume to maximize storage efficiency throughout the liquid distribution cycle.

Inventive Principle:
Principle #15Dynamics

3Quantity of substance

If tank volume increases to improve storage capacity, then more liquid can be stored, but the system occupies more space in the rigid container

Engineering Contradiction:
Improveliquid storage capacityVSAvoidsystem occupied volume
Core Design Contradiction:
Quantity of substanceVSVolume of stationary object

Solution Approach 1:

The patent implements nesting by placing the recovery tank inside the distribution tank when the distribution tank is empty. The contracted recovery tank fits within the expanded distribution tank volume, eliminating the need for separate tank compartments and complex separation mechanisms while maximizing space utilization in the rigid container.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent introduces dynamic flexibility within the rigid container by using flexible tanks that can expand and contract based on their liquid content. The distribution tank expands when full and contracts when empty, allowing the rigid container to maintain its structural integrity while the internal tanks dynamically adjust their volume to maximize storage efficiency throughout the liquid distribution cycle.

Inventive Principle:
Principle #15Dynamics

4Adaptability or versatility

If flexible tank walls are used to enable configuration changes, then adaptability improves, but manufacturing precision becomes more difficult

Engineering Contradiction:
Improveconfiguration adaptabilityVSAvoidmanufacturing precision
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent employs flexible tank walls made from elastomeric materials that can reversibly change their configuration between expanded and contracted states. These flexible shells are manufactured with consistent material properties and geometric features that enable reliable, repeatable deformation patterns, achieving the required adaptability while maintaining manufacturing precision through material selection and standardized design.

Inventive Principle:
Principle #30Flexible shells and thin films

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 simplifies manufacturing and use, enhances storage volume, and ensures structural integrity by allowing the reservoirs to adapt to different configurations without volume change, facilitating efficient liquid distribution and recovery while being easy to install and remove.

Implementation Method 1

an elastic separation wall arranged at an angle in the tank

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

a spring located around the perimeter of the upper tank, notably to distribute water under pressure

Methodology Applied
Scientific EffectElastic potential energy: Spring

Implementation Method 3

a pump disposed inside said distribution reservoir and an electrical supply cable for said pump adapted to be connected to electrical supply means

Methodology Applied
Scientific EffectPumping: Pump

Data Source

PatentEP1993936B1System for dispensing and recovering liquids and device comprising same
Publication Date: 2021.08.18 LEGRAND SNC
  • EP1993936B1 patent drawingFigure 1~2
  • EP1993936B1 patent drawingFigure 3~4
  • EP1993936B1 patent drawingFigure 5~6

AI summary

The invention concerns a system for dispensing and recovering liquids designed to be arranged in a rigid container, comprising a liquid dispensing tank (16) and a tank (17) for recovering liquid after use, each tank (16, 17) including an envelope (18). Each envelope (18) includes two similar walls (19, 20) comprising each an outer surface and a peripheral edge (23). Each envelope (18) has a retracted configuration wherein said walls (19, 20) are deployed one proximate the other and in an inflated configuration wherein said outer surfaces of each said wall (19, 20) are convex. At least one envelope (18) is capable, in its inflated configuration, to be nested in the other envelope (18) in its retracted configuration.