Ergonomic whisk for food processing

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Solution Overview

Problem

Existing appliances for frothing milk are not ergonomic, hygienic, and efficient, with fixed stirring mechanisms that are difficult to clean and prone to encrustation, and they often fail to handle microbiologically sensitive liquids effectively.

Innovation Solution

A machine with a removable, ergonomically designed impeller that incorporates a magnetic drive system, allowing for adjustable stirring distances and speeds, and a container that is easily cleanable, featuring a thermal conditioner for heating or cooling, and a magnetic coupling mechanism to separate the impeller from the liquid during operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a fixed stirring mechanism is used in existing appliances, then the structure is simple and cost-effective, but the mechanism is difficult to clean and prone to encrustation of solid residue

Engineering Contradiction:

Improvestructural simplicityVSAvoidcleaning ease

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The stirring mechanism is segmented into a removable impeller that can be separated from the tank. The impeller consists of multiple cleaning-friendly components including a hub, arms, and disposable whisk elements that can be easily removed and cleaned or replaced, solving the cleaning difficulty while maintaining structural simplicity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The stirring mechanism (impeller) is extracted as a removable component from the tank, allowing it to be completely separated for cleaning. This enables the user to remove the impeller and clean all surfaces that contact food, eliminating the encrustation problem while keeping the overall structure simple and cost-effective

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a fixed stirring mechanism with multiple components is used, then the driving function is reliable, but the number of components increases and cleaning becomes more difficult

Engineering Contradiction:

Improvedriving function reliabilityVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The mechanical connection between the drive and impeller is replaced with magnetic coupling. The drive unit remains outside the tank and magnetically couples to the impeller through the tank wall, eliminating the need for shafts, seals, and bearings inside the tank. This maintains reliable driving function while dramatically reducing component count and simplifying cleaning

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The tank wall acts as an intermediary medium that transmits magnetic force from the external drive unit to the impeller. This allows the drive mechanism to remain outside the tank (simple to clean) while still reliably driving the impeller through magnetic coupling, reducing internal components while maintaining driving reliability

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the impeller remains in contact with the liquid food substance during operation, then the stirring effect is continuous, but the risk of encrustation and contamination increases

Engineering Contradiction:

Improvestirring continuityVSAvoidencrustation and contamination risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The impeller is designed to be easily removable and cleanable by the user without requiring disassembly of the tank or drive mechanism. The simple construction with removable whisks and open arms allows the impeller to self-clean during tank washing, maintaining stirring continuity while reducing encrustation risk through user-friendly cleaning access

Inventive Principle:

Principle #25Self-service

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 machine provides efficient and hygienic processing of milk-based substances by minimizing contact with mechanical components, reducing cleaning complexity, and ensuring effective frothing or mixing while maintaining user safety and convenience.

Implementation Method 1

a magnetic coupling mechanism to separate the impeller from the liquid during operation

Methodology Applied

Scientific EffectMagnetic coupling: Magnetic Field

Implementation Method 2

a thermal conditioner for heating or cooling

Methodology Applied

Scientific EffectThermal conditioning: Heating

Data Source

PatentUS20260013670A1Ergonomic whisk for food processing

Publication Date: 2026.01.15 SOCIETE DES PRODUITS NESTLE SA

AI summary

A machine for stirring a liquid food substance has a container delimiting a cavity with a bottom and a peripheral wall for containing the liquid food substance to be stirred. The cavity extends generally along a generally upright central container axis and has a mouth for removing from the container the liquid food substance upon stirring. The machine also has an impeller including an impelling member to be rotated in the cavity against the liquid food substance about an impeller axis that is generally identical or generally parallel to the container axis. The impelling member is configured to be spaced above the cavity's bottom by (i) a maximum stirring distance when the impelling member is rotated at a maximum stirring speed about the impeller axis and (ii) a resting distance, smaller than the maximum stirring distance (H), when the impelling member stands still.