Teat Cup Liner Transition Section for Uniform Pressure
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Solution Overview
Problem
Conventional teat cup liners apply uneven pressure to the teat during milking, leading to potential lesions and infections due to the non-uniform vacuum distribution, particularly at the upper part of the teat closest to the mammal's skin.
Innovation Solution
A teat cup liner design featuring an elongated transition section with a gradual change in radius, combined with a triangular section, which allows for uniform pressure application and effective decoupling of the milking vacuum from the uppermost part of the teat, reducing the incidence of lesions and infections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional teat cup liner with a simple cylindrical barrel is used, then the device complexity is low, but the pressure distribution on the teat is non-uniform leading to lesions and infections
Solution Approach 1:
The barrel is segmented into three distinct sections: a circular cross-section portion, a transition section with gradually changing cross-section, and a triangular cross-section portion. This segmentation allows each section to perform a specific function - the circular section provides initial collapse, the transition section ensures uniform pressure distribution, and the triangular section prevents vacuum application to the upper teat, thereby improving teat health without excessive complexity
Solution Approach 2:
Different sections of the barrel are given different cross-sectional geometries tailored to specific functional requirements. The circular section provides omnidirectional collapse, the transition section provides gradual geometric change for uniform pressure, and the triangular section provides three-directional collapse with gap prevention. This local differentiation of structure optimizes pressure distribution at each location along the teat
2Reliability
If the transition section has a steep slope for compactness, then the device length is reduced, but the pressure distribution becomes non-uniform
Solution Approach 1:
The transition section is designed with a controlled slope where the change in radius is limited to less than 0.3 relative to the length of the transition section. This parameter constraint ensures that the geometric transition is gradual enough to maintain uniform pressure distribution during barrel collapse, while still achieving the transition from circular to triangular cross-section within a reasonable length
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 ensures a more uniform pressure distribution along the teat, allowing the upper part of the barrel to collapse around the teat during milking, effectively reducing the risk of lesions and infections by decoupling the vacuum from the uppermost part of the teat.
Implementation Method 1
Vacuum is continuously applied inside the liner (e.g., through the tube section 120), and vacuum is alternately and cyclically applied to a chamber in the milking assembly to open and close the barrel section 130 of the liner 100 below the teat
Data Source
AI summary
A teat cup liner is disclosed that includes an attachment section having an opening therein, a barrel joined to and in fluid communication with the attachment section, and a tube section, joined to and in fluid communication with the barrel. The barrel includes a transition section and a triangular section. A combined length of the attachment section and the transition section is (i) from 5.5 to 8.5 cm long, (ii) an average teat length (after elongation), optionally minus a minimum uniform pressure length, ±20%, or (iii) 40-65% of a combined length of the attachment section and the barrel. Alternatively, the transition section has a surface with a slope of less than 0.3, where the slope is defined by a change in the radius of the barrel in the transition section relative to the length of the transition section. The tube section includes a connection mechanism.