Cam-Controlled Brewing Chamber for Variable Beverage Doses
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Solution Overview
Problem
Existing two-piston brewing apparatuses for beverage vending machines are bulky, have a fixed bottom dead center position, and lack variability in brewing chamber volume, preventing the use of a single apparatus for different beverage types and often result in complex mechanisms that can jam or lose coordination.
Innovation Solution
A brewing apparatus with a simplified design featuring a fixed cam device and movable cam followers that allow for adjustable brewing chamber volume and piston movement, enabling the brewing of different amounts of material without the need for a connecting rod-crank mechanism, thus reducing bulkiness and operational issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a connecting rod-crank mechanism is used to control the pressure piston, then the piston movement is achieved, but the apparatus becomes bulky particularly in the height direction
Solution Approach 1:
The patent removes the connecting rod-crank mechanism entirely and replaces it with a direct cam-follower control system. The cam profile on the rotating disk directly guides the pressure piston's movement through a follower, eliminating the intermediate connecting rod and crank components that contribute to apparatus height.
Solution Approach 2:
The patent substitutes the complex connecting rod-crank mechanical system with a simpler cam-follower mechanism driven by a rotating disk. This replacement reduces mechanical complexity and vertical space requirements while maintaining precise piston control capability.
2Device complexity
If a fixed bottom dead centre position is used in the mechanism, then the mechanism structure is simplified, but the brewing chamber volume cannot be varied for different amounts of material
Solution Approach 1:
The patent makes the brewing chamber volume dynamic by allowing the chamber to expand and contract as the pressure piston moves. The cam profile on the rotating disk controls the piston position, enabling the chamber volume to adapt to different amounts of brewing material while maintaining a relatively simple fixed cam structure.
Solution Approach 2:
The patent changes the volume parameter of the brewing chamber by controlling the pressure piston's position through the cam mechanism. By varying the cam profile or the amount of material, the effective brewing chamber volume can be adjusted without changing the fundamental fixed cam structure.
3Reliability
If cam-controlled mechanisms with cam followers are used for positive control of brewing chamber and ejector piston movements, then movement control is improved, but the mechanisms become extremely complicated and may result in jamming and lack of coordination
Solution Approach 1:
The patent merges the control of the pressure piston and brewing chamber into a single integrated cam-follower system. The rotating disk with cam profiles simultaneously controls both components, reducing the number of separate mechanisms and potential failure points while maintaining precise coordinated movement.
Solution Approach 2:
The rotating disk with cam profiles serves multiple functions: it controls the pressure piston movement, controls the brewing chamber movement, and provides the timing coordination between these components. This multi-functional design reduces overall mechanism complexity while maintaining reliable control.
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 apparatus allows for the efficient brewing of various beverage quantities using a compact and reliable mechanism, eliminating the need for complex cam-controlled systems and ensuring consistent operation by adjusting piston and brewing chamber movements based on material amount.
Implementation Method 1
a fixed cam device and movable cam followers that allow for adjustable brewing chamber volume and piston movement
Data Source
Figure 1
Figure 2~3
Figure 4A~5A
AI summary
A brewing apparatus (1), in particular for brewed beverage vending machines, the brewing apparatus (1) having a fixed axis (7); a fixed frame (2); a reversible drive (71); and a number of movable driven members (29, 37, 43, 56, 68) all connected directly or indirectly to the drive (71) to only oscillate about the fixed axis (7) and/ or move radially with respect to the fixed axis (7).