Multi-piece stemware

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Solution Overview

Problem

Current multi-piece vessels with detachable bases face issues such as damage at attachment points, limited material choices, insecure storage, and instability due to thermal expansion differences and lateral sliding, which are not addressed by existing magnetic or friction-based attachment methods.

Innovation Solution

The use of magnetic connections between the vessel body and base, combined with alignment features, allows for secure attachment, detachment, and nesting, enabling stable freestanding use and compact storage, while allowing for different materials and preventing lateral movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If compression, friction or threaded connections are used for attachment of base with vessel body, then the base and body can be attached for use, but damage occurs at attachment points and material choices are limited

Engineering Contradiction:

Improveattachment strengthVSAvoiddamage at attachment point

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent replaces mechanical attachment systems (compression, friction, threaded connections) with a magnetic attachment system. Magnets embedded in the base and vessel body create a magnetic field that provides secure attachment without physical contact stress, eliminating damage at attachment points while maintaining strong connection force.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the attachment mechanism from mechanical force-based to magnetic field-based. By utilizing magnetic field strength as the attachment parameter instead of mechanical compression or friction, the system achieves secure attachment without the harmful localized stresses that cause damage at connection points.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If different materials are used for base and body, then manufacturing flexibility increases, but thermal expansion differences cause damage

Engineering Contradiction:

Improvematerial selection flexibilityVSAvoidthermal expansion damage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The magnetic attachment system replaces mechanical connections that transmit thermal stress. Since magnetic fields are not affected by thermal expansion, different materials can be used for the base and body without risking damage from differential thermal expansion, as the magnetic bond maintains constant strength across temperature changes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Volume of moving object

If foot is sized to fit within inner perimeter of opening for collapsed storage, then storage compactness improves, but vessel stability decreases

Engineering Contradiction:

Improvestorage volumeVSAvoidvessel stability

Core Design Contradiction:

Volume of moving objectVSStability of the object's composition

Solution Approach 1:

The patent implements nesting by sizing the foot to fit within the inner perimeter of the vessel body opening, allowing the base to be stored compactly within the body when not in use. This nested configuration minimizes storage volume while the magnetic attachment ensures secure positioning during storage.

Inventive Principle:

Principle #7Nested doll (Nesting)

4Strength

If magnetic connections are used, then attachment strength and material versatility improve, but lateral sliding susceptibility occurs

Engineering Contradiction:

Improveconnection strengthVSAvoidlateral stability

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The patent combines magnetic attachment with mechanical retention features to create a composite attachment system. The magnetic field provides strong connection force while the retention features (such as protrusions or grooves) prevent lateral sliding, achieving both strong attachment and lateral stability through the combination of magnetic and mechanical elements.

Inventive Principle:

Principle #40Composite materials

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

This configuration enhances connection strength, stability, and versatility, allowing for easy cleaning, stacking, and decorative features, while reducing damage risks and material limitations.

Implementation Method 1

a second magnetic element disposed in an attachment assembly coupled with the closed end of the body. The second magnetic element forms a magnetic coupling with the first magnetic element

Methodology Applied

Scientific EffectMagnetic coupling: Magnetism

Data Source

PatentEP4280916B1Multi-piece stemware

Publication Date: 2026.03.04 HAUG JAMES

Figure 1
Figure 2A~2C
Figure 3A~6C

AI summary

In a general aspect, a multi-piece vessel can include a body (101) defining an interior volume, and a base (105, 106). The body (101) can include a closed end (101B), and an open end (101A) opposite the closed end. The base can have a foot (105) arranged in a plane. The base can include a stem (106) arranged along a longitudinal axis that is orthogonal to the plane, and a first magnetic element (102) disposed at an end of the stem. The multi-piece vessel can also include an attachment assembly coupled with the closed end of the body, the attachment assembly having a second magnetic element (107) configured to form a magnetic coupling with the first magnetic element, and a retention feature defined on a surface of the attachment assembly distal from the body.