A coffee machine with a grinder
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Solution Overview
Problem
Consistency in puck preparation for coffee extraction is challenging due to uneven distribution of coffee grounds and variable tamping pressure in existing coffee machines.
Innovation Solution
A coffee machine with a grinder, a grind chute, and a tamping unit featuring a linkage-connected tamp that presses the coffee grounds into a puck and returns to a rest position laterally out of the flow path, ensuring consistent tamping and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the tamp remains in the flow path during coffee grounds delivery, then the structure is simpler, but the distribution of coffee grounds becomes uneven
Solution Approach 1:
The patent applies the dynamics principle by making the tamp movable rather than stationary. The linkage mechanism connects the tamp to a rotating member, allowing the tamp to dynamically change its position between blocking the flow path during delivery and being moved out of the way during grounds distribution. This dynamic positioning resolves the contradiction by enabling both even distribution and structural functionality.
Solution Approach 2:
The patent employs dimensionality change by moving the tamp laterally in addition to vertical movement. The linkage mechanism allows the tamp to be moved out of the flow path in a lateral direction during the return stroke, creating clearance for even grounds distribution. This multi-dimensional movement resolves the spatial conflict between the tamp position and grounds flow.
2Force
If the tamp is pressed vertically during tamping, then the tamping pressure is maximized, but the tamp blocks the coffee grounds flow path
Solution Approach 1:
The patent uses dynamics by implementing a rotating member that periodically changes the tamp's orientation and position. During the tamping phase, the tamp is pressed vertically to maximize force. During the delivery phase, the rotating member moves the tamp laterally out of the flow path, preventing blockage. This temporal separation of functions resolves the contradiction between force application and flow efficiency.
Solution Approach 2:
The patent applies periodic action through the rotating member that oscillates the tamp between two positions: one for vertical pressing during tamping and another moved out of the flow path during grounds delivery. This periodic movement ensures that the tamp only blocks the path when needed for tamping, while allowing efficient delivery during the return stroke.
3Length of moving object
If the lower opening of the chute is positioned lower, then the delivery distance is shorter, but the tamp cannot be moved out of the flow path
Solution Approach 1:
The patent resolves this contradiction by adding lateral movement capability to the tamp through the linkage mechanism. Even with the lower opening positioned at an optimal height for short delivery distance, the linkage allows the tamp to be moved laterally out of the flow path during the return stroke, providing both efficient delivery and operational flexibility.
Data Source
AI summary
A coffee machine (1) with a grinder (10), a grind chute (21) for delivering coffee grounds along a flow path (22) and into a portafilter (40) fitted to the machine (1), and a tamping unit (2) with a tamping mechanism (11) for pressing the coffee grounds held by the portafilter (40) into a puck, wherein the tamping mechanism (11) includes a linkage (30) connected to a tamp (14), the linkage (30) being arranged to press a face (25) of the tamp (14) in an axial direction (24) with respect to the portafilter (40) during a tamping operation, and wherein the linkage (30) returns the tamp (14) to a rest position where the tamp face (25) is moved laterally, out of the flow path (22), wherein the coffee machine (1) includes a chute (21) for directing the coffee grounds along the flow path (22), the chute (21) having a lower opening (21b) for delivering the coffee grounds along the flow path (22) to the portafilter (40), and wherein the lower opening (21b) is located above the rest position of the tamp (14).