Disposable Plastic Milking Manifold for Bio Burden Reduction
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Solution Overview
Problem
Milking devices made from metal, such as stainless steel, face issues with milk quality due to separation in vacuum buffers and difficulty in cleaning, leading to bio burden contamination, especially when used for genetically engineered rabbits producing proteins like the C1 inhibitor protein.
Innovation Solution
A milking device designed with a plastic vessel and cover plate, featuring a partition wall that separates the collecting chamber into upper and lower portions, with conduits and tubings to prevent froth buildup and contamination, and a manufacturing method using injection molding for enhanced cleanliness and hygiene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If metal manifold with tiny channels is used to obtain better milk flow and stable vacuum, then milk flow and vacuum stability are improved, but cleaning difficulty increases and bio burden contamination occurs
Solution Approach 1:
The patent employs a disposable plastic manifold that is discarded after a single use or limited number of uses, eliminating the need for thorough cleaning and validation. This disposable approach resolves the cleaning difficulty while maintaining the tiny channel design for optimal milk flow and vacuum stability.
Solution Approach 2:
The patent changes the material parameter from metal to plastic, which fundamentally alters the cleaning requirements. Plastic manifolds can be designed with smoother surfaces and larger radii in channels, making them easier to clean or disposable, while still achieving the required milk flow characteristics through appropriate channel dimensioning.
2Reliability
If metal manifold with tiny channels is used to provide stable vacuum, then vacuum stability is improved, but cleaning validation becomes problematic
Solution Approach 1:
By using a disposable plastic manifold, the patent eliminates the need for cleaning validation entirely. Each new manifold is sterile upon opening, and after use it is discarded, preventing any bio burden accumulation. This approach maintains vacuum stability through proper design while removing the validation burden.
Solution Approach 2:
The plastic manifold is pre-sterilized during manufacturing in controlled conditions, ensuring it is free from contamination before first use. This preliminary sterilization action eliminates the need for subsequent cleaning validation, as the device starts in a known sterile state.
3Quantity of substance
If vacuum buffer is used to separate milk from vacuum flow, then milk separation is achieved, but froth buildup occurs and contaminates vacuum line
Solution Approach 1:
The patent removes the vacuum buffer component entirely from the system. Instead of using a separate buffer vessel for milk-vacuum separation, the design integrates separation functionality directly into the manifold structure, preventing froth buildup in a dedicated separation zone that could contaminate the vacuum line.
Solution Approach 2:
The patent segments the manifold into distinct functional zones: a milk collection area with tiny channels for milk flow, and a separate vacuum interface area. This segmentation allows milk to be separated from the vacuum flow path without requiring a vacuum buffer, as the plastic manifold's structure naturally prevents froth formation and contamination.
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 separates milk from vacuum, reducing bio burden to near zero levels and improving hygiene by preventing froth buildup and facilitating easier cleaning, making it suitable for genetically engineered rabbits.
Implementation Method 1
the manifold is further connected to a vacuum buffer for pumping milk from the manifold by use of a vacuum flow
Implementation Method 2
the partition wall which separates the collecting chamber in a lower collecting chamber portion and an upper collecting chamber portion
Data Source
Figure 1a
Figure 1b
Figure 2~3b
AI summary
A milking device includes a vessel (2) and cover plate (3). The vessel and the cover plate form a sealed volume that is internally divided into a collecting chamber (4), a vacuum chamber (5) and an air intake chamber (6). The collecting chamber is arranged between the vacuum chamber and the air intake chamber. The vessel has a first internal wall (7) that separates the collecting chamber from the air intake chamber, with a first passage ( 9 ) between the collecting chamber and the air intake chamber arranged at the first internal wall. The vessel has a second internal wall (8) that separates the collecting chamber from the vacuum chamber, with a second passage (10) between the collecting chamber and the vacuum chamber arranged at the second internal wall.