Flow control filter cap and methods of use
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Solution Overview
Problem
Conventional beverage caps with pressure-activated valves are unsuitable for paper filters due to tearing and blowout, leading to leakage and wear, and fail to provide uniform pressure distribution, affecting the quality of beverages like espresso.
Innovation Solution
A beverage cap design featuring a pressure-activated valve with discontinuous protrusions and a removable valve insert that supports the filter, distributing pressure uniformly and preventing blowout, allowing use of paper filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional caps with radial ridges are used to support metal filters and define radial flow paths, then beverage making at increased pressure is facilitated, but paper filters are subjected to high pressure causing tearing and blowout
Solution Approach 1:
The cap interior surface is segmented into multiple discrete protrusions distributed across the surface, rather than using continuous radial ridges. This segmentation distributes the pressure applied to the filter across many small contact points, preventing concentrated stress that causes paper filter blowout while still providing adequate support.
Solution Approach 2:
The protrusions are designed with specific local characteristics (size, spacing, height) optimized for paper filter support. Each protrusion provides localized pressure distribution, and the varying distribution pattern across the cap surface creates regions of different pressure intensity to optimize both filter support and beverage flow.
2Power
If high pressure is applied during beverage pressing, then espresso quality is improved, but leakage occurs and the beverage cap and valve are subjected to wear and tear
Solution Approach 1:
The cap design with distributed protrusions prepares the pressure distribution in advance before pressing begins. By pre-configuring the pressure distribution pattern through the protrusion geometry and arrangement, the system prevents leakage paths from forming during pressing, reducing wear on the valve and cap components.
3Productivity
If radial flow paths are defined by continuous ridges, then pressurized flow is directed to the central valve, but uniform pressure distribution is not achieved
Solution Approach 1:
The continuous radial flow paths are segmented into multiple discrete flow channels defined by the spaces between individual protrusions. This creates numerous small flow paths that collectively distribute pressure more uniformly across the filter while still maintaining efficient flow to the central valve.
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 cap provides improved support and uniform pressure distribution, preventing filter blowout and enhancing the quality of beverages by ensuring even fluid flow and crema layer formation.
Implementation Method 1
the cavity having a bottom surface and a central hole with a pressure-activated valve to facilitate passage of fluid during filtering with the press. The pressure-activated valve is disposed within the main body and the pressure-activate valve is configured in a closed configuration when pressure within the cavity during filtering with the press is less than a minimum pressure and to assume an open configuration to facilitate fluid flow therethrough when the pressure during filtering with the press is greater than the minimum pressure.
Implementation Method 2
The main body includes a plurality of protrusions or projections extending upwards from the bottom surface in the open cavity to support a filter. In some embodiments, the plurality of protrusions are discontinuous and distributed across the interior surface so as to distribute pressurized fluid flow within the cap and inhibit blow when used with a paper filter.
Data Source
AI summary
A beverage cap with pressure-activated valve for use with filter presses having a hollow cylinder and removable piston that when pressed forces liquid through the cylinder and beverage cap into an open vessel. Such presses are particularly suited for coffee beverages, especially espresso. The beverage cap includes multiple protrusions that are discontinuous and distributed to improve filter support and distribute pressure more uniformly through the cavity and along the filter, thereby allowing use of thin paper filters and avoiding tearing or blow out. The beverage cap can include a removable valve insert that includes a valve body supporting a movable vale and support members that support the filter at a central valve region, further reinforcing the filter to avoid blow out of paper filters. The beverage cap can include a gasket to enhance air-tight sealing with the cylinder and can include multiple valves for use with oversized presses.