Conical burr coffee grinder
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Solution Overview
Problem
Conventional home coffee grinders are limited in the range of grind sizes they can produce, often failing to achieve both fine and coarse grind sizes, and suffer from residue and waste issues.
Innovation Solution
A conical burr coffee grinder with a grinding arrangement featuring inner and outer conical burrs that rotate to produce various grind sizes, a rotor gear with vertical openings, an ionizer to remove static charge, and a multipurpose container with adjustable modes for different grind sizes, ensuring minimal waste and residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If home coffee grinders use simple grinding mechanisms, then they are inexpensive and convenient for home use, but they cannot produce both fine and coarse grind sizes
Solution Approach 1:
The patent employs an adjustable grind size mechanism that allows the grinding burrs to be positioned at different distances from each other. This dynamic adjustment capability enables the same grinder to produce both fine espresso grounds and coarse cold brew grounds, resolving the contradiction between versatility and complexity by making the grinding mechanism adaptable rather than fixed
Solution Approach 2:
The conical burr grinder design with adjustable settings creates a universal device that can perform multiple grinding functions - producing various grind sizes for different brewing methods (espresso, pour over, cold brew, etc.). This multi-functionality allows a single home device to replace what would otherwise require multiple specialized grinders, achieving versatility without proportionally increasing complexity
2Loss of substance
If traditional coffee grinders are used, then they are simple in design, but they leave residue from one batch to another causing waste and mess
Solution Approach 1:
The patent incorporates a removable container that can be easily detached from the grinder body. This extraction capability allows users to remove the container for thorough cleaning, eliminating residue that would otherwise remain in a fixed, hard-to-clean grinder chamber. The separation of the container from the main body enables complete removal of coffee grounds and residue, solving the waste problem while adding minimal complexity
Solution Approach 2:
The design facilitates complete discarding of coffee grounds through the removable container, and the container itself can be recovered and reused. The vertical discharge path ensures grounds are completely evacuated into the container, minimizing residue left in the grinding mechanism. This approach addresses the residue issue by enabling complete removal and recovery of the collection container
3Manufacturing precision
If home coffee grinders are designed for simplicity, then they are convenient for home use, but they cannot achieve consistently fine grind size for espresso
Solution Approach 1:
The adjustable grind size mechanism allows precise control over the gap between conical burrs, enabling the production of consistently fine grounds for espresso. By making the burr spacing adjustable rather than fixed, the system achieves manufacturing precision for fine grinds without requiring an overly complex mechanism - simply a movable component that changes the grinding gap
Solution Approach 2:
The patent replaces blade-based cutting mechanisms with conical burr grinding, which provides superior consistency for fine grinds. The burrs crush and grind beans between their surfaces, creating uniform particle sizes essential for espresso, rather than chopping them irregularly like blades. This mechanical substitution achieves precision without excessive complexity
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 grinder efficiently produces coffee grounds of desired sizes from 200 to 1200 microns, minimizing waste and residue, suitable for both espresso and coarse applications, and is designed for home and small environments.
Implementation Method 1
The ionizer can be configured to project charged ions into the inner volume of the chute while coffee grounds pass through the inner volume, and the charged ions can remove static charge from the coffee grounds passing through the inner volume.
Data Source
AI summary
A conical burr coffee grinder can include a hopper that receives coffee beans, a grinding arrangement beneath the hopper, and a removable container beneath the grinding arrangement. The grinding arrangement can include an inner conical burr within an outer conical burr. At least one conical burr can rotate with respect to the other to grind the coffee beans into coffee grounds and dispense the coffee grounds into the container. The coffee beans and coffee grounds can follow a substantially vertical path from the hopper through the grinding arrangement and into the container, which can be multipurpose. A rotor gear can be coupled to the inner conical burr such that the rotor gear and inner conical burr rotate together as a combined unit. Additional components can include a rotational motor, a geartrain, a removable hopper lid, a grind adjustment assembly, a chute, an ionizer, a base, and a safety switch.