French Press Piston Head Assembly for Hygienic Cleaning
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Solution Overview
Problem
The existing piston designs in French press coffee makers, particularly in reverse French press systems, face issues with hygiene and cleaning due to coffee accumulation around screw heads, leading to potential bacterial contamination.
Innovation Solution
A piston head design featuring a piston body and cover with a continuous flat top surface, a skirt with a groove for a seal, and an attachment system using a holding plate with pegs and washers, which secures the piston cover without screw heads being in contact with the coffee, reducing bacterial contamination and facilitating cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws are used to secure the piston cover to the piston body, then the structural integrity and assembly strength are improved, but coffee accumulates around the screw heads making cleaning difficult and reducing hygiene
Solution Approach 1:
The patent removes the screws from the coffee-contacting surface by relocating them to the bottom of the piston body. The piston cover is secured through alternative means (integration or sealing from below) that do not require protruding screw heads on the top surface, thereby eliminating the hygiene problem while maintaining assembly strength.
Solution Approach 2:
Instead of securing the piston cover from the top with visible screw heads, the patent inverts the approach by securing the cover from the bottom or through integration, placing the fastening elements on the opposite side from where coffee would accumulate.
2Reliability
If a plate with screws is used to secure the piston cover, then the connection reliability is improved, but the device complexity and difficulty of cleaning are increased
Solution Approach 1:
The patent merges the piston cover and piston body into a more integrated structure where the cover is directly formed as part of the piston assembly or secured through simplified means, eliminating the separate plate and multiple screw components, thereby reducing device complexity while maintaining connection reliability.
Solution Approach 2:
The patent extracts the plate component entirely from the design, relying on direct integration or alternative fastening methods that do not require an intermediate plate structure, thus simplifying the overall device while preserving connection reliability.
3Strength
If screw heads are exposed on the piston head surface, then the assembly can be securely fastened, but coffee accumulation occurs leading to hygiene issues
Solution Approach 1:
The patent removes screw heads from the coffee-contacting surface entirely, relocating fastening elements to the bottom of the piston body or using integration methods, thereby eliminating the niche where coffee accumulates and bacteria can grow while maintaining fastening strength through alternative means.
Solution Approach 2:
The patent inverts the fastening approach by securing components from the bottom rather than the top, placing fastening elements on the opposite side from coffee exposure, thus preventing contamination while maintaining structural integrity.
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 design prevents coffee accumulation around screw heads, enhancing hygiene and ease of cleaning, thereby maintaining the piston head's cleanliness and functionality.
Implementation Method 1
The skirt of the piston body includes at least one groove. The piston head further comprises a seal disposed at least in part in the at least one groove. The seal is disposed between the piston body and the piston cover.
Implementation Method 2
the piston cover connects to the piston body by suction
Data Source
AI summary
An attachment system for connecting a piston cover to a piston body of a french press coffee maker comprises a plate having a top surface and a bottom surface. The bottom surface of the plate is adapted to be in contact with a top surface of the piston cover. The bottom surface has at least one peg extending therefrom. The at least one peg is adapted to be inserted into at least one aperture of the piston cover and corresponding at least one aperture of the piston body. The at least one peg is adapted to be secured to the bottom surface of the piston body. Piston heads for a brewing chamber of a french press coffee maker are also presented.