A coffee puck removal device
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Solution Overview
Problem
Conventional methods for removing coffee pucks from espresso machine portafilters are messy, require excessive force, and can damage the portafilter due to the need for repeated striking against a knock box, especially when the puck has dried out.
Innovation Solution
A coffee puck removal device that uses a vacuum source to create a pressure difference, allowing the coffee puck to be dislodged from the portafilter without physical striking, and includes a sensor to detect engagement and disengagement of the portafilter for controlled operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the portafilter is struck against the knock box to dislodge the coffee puck, then the coffee puck is removed from the portafilter, but the coffee puck fragments may spray onto surfaces creating mess and the portafilter may be damaged
Solution Approach 1:
The patent replaces the mechanical striking action with a vacuum-based system. A vacuum source creates negative pressure that draws the coffee puck out of the portafilter through a collection chamber, eliminating the need for physical impact and preventing coffee fragments from spraying onto surrounding surfaces.
Solution Approach 2:
The invention uses vacuum pressure (pneumatic force) to remove the coffee puck. The vacuum source creates a pressure differential that pulls the coffee puck from the portafilter into the collection chamber, providing a controlled and clean removal method compared to mechanical striking.
2Productivity
If the portafilter is struck repeatedly against the knock box to remove a dried and hardened coffee puck, then the coffee puck is eventually dislodged, but the striking action creates loud noises and requires increased force
Solution Approach 1:
The vacuum system replaces repeated mechanical striking with a sustained vacuum force. The vacuum source continuously applies negative pressure to gradually pull out even dried and hardened coffee pucks, eliminating loud noises and the need for excessive force.
Solution Approach 2:
The system uses dynamic vacuum pressure that can be adjusted and sustained over time. The vacuum force can be maintained continuously until the coffee puck is fully removed, providing a controlled and gradual extraction process rather than repeated impact forces.
3Productivity
If the portafilter is struck against the knock box at an unsuitable angle, then the coffee puck may not be properly dislodged, but additional cleaning is required to remove sprayed coffee fragments
Solution Approach 1:
The vacuum system eliminates the angle-dependent striking action by using uniform negative pressure applied across the coffee puck surface. This ensures consistent removal regardless of portafilter orientation, and all coffee fragments are drawn into the collection chamber rather than spraying onto surrounding surfaces.
Solution Approach 2:
The collection chamber acts as an intermediary that captures the coffee puck and fragments during removal. This intermediate containment structure prevents coffee from reaching surrounding surfaces, eliminating the need for additional cleaning of sprayed fragments.
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 device effectively removes coffee pucks with reduced mess and noise, and without damaging the portafilter, by utilizing vacuum pressure to dislodge the puck, thereby improving the efficiency and cleanliness of the process.
Implementation Method 1
a vacuum source to create a pressure difference, allowing the coffee puck to be dislodged from the portafilter
Implementation Method 2
air pressure applied to the major inner face is greater than air pressure applied to the exposed major outer face
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A coffee puck removal device (10) to remove a coffee puck (24) from a portafilter (20) is disclosed herein. The coffee puck removal device (10) has an open compartment (22) containing the coffee puck (24), the coffee puck (24) having an exposed major outer face (26) and a major inner face (28) when the coffee puck (24) is located in the open compartment (22). The device (10) includes: a body (12) having a rim (14) surrounding an aperture (16), with the rim (14) being configured to engage the portafilter (20), with the open compartment (22) facing the body (12) to inhibit air passing between the portafilter (20) and the rim (14); and a vacuum source (30) to remove air from the aperture (16) so that air pressure applied to the major inner face (28) is greater than air pressure applied to the exposed major outer face (26) so that the coffee puck (24) is removed from the portafilter (20).