Baby Bottle Conical Jacket and Variable Teat Wall Thickness
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Solution Overview
Problem
Existing baby bottles create negative pressure during feeding, leading to air being sucked in and colics in infants, as they require stiff sucking parts to prevent teat collapse, which hinder milk intake and simulate breast-feeding poorly.
Innovation Solution
A baby bottle with a conical shape and varying teat wall thicknesses, featuring a large air intake valve at the bottom and a resilient teat design that mimics the breast, allowing pressure equalization and preventing vacuum formation, enabling easy milk stripping without suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional cylindrical bottle jacket with small bottom area is used, then the structure is simple and manufacturing is easy, but the valve element area is small causing air intake only at large pressure differences and negative pressure formation
Solution Approach 1:
The bottle jacket transitions from a conventional symmetric cylindrical shape to an asymmetric conical shape with a widened bottom region. This asymmetric design increases the bottom surface area by approximately 50-100% compared to cylindrical designs, allowing for a larger valve element area that enables air intake at smaller pressure differences, thereby preventing negative pressure formation and colics while maintaining manufacturing feasibility through injection molding
Solution Approach 2:
The invention changes the dimensional configuration of the bottle jacket from a uniform cylindrical cross-section to a conical configuration with varying cross-sectional areas along the height. This dimensional change creates a larger bottom area without increasing the overall bottle volume significantly, allowing the valve element area to be increased while maintaining a compact bottle size suitable for infants
2Strength
If the teat shaft is made stiff to prevent collapse under negative pressure, then structural stability is improved, but milk stripping becomes difficult and breast-feeding simulation deteriorates
Solution Approach 1:
The teat shaft is designed with non-uniform wall thickness, featuring a thicker wall section (approximately 2-3mm) in the lower portion and a thinner wall section (approximately 1-2mm) in the upper portion. This local quality variation provides the necessary structural stability in the thicker section to resist collapse while allowing the thinner upper section to be easily stripped by the infant, simulating natural breast-feeding without requiring strong suction
Solution Approach 2:
The teat shaft transitions from a static uniform structure to a dynamic structure with varying wall thickness that adapts to different functional requirements along its length. The thicker lower section provides structural support and stability, while the thinner upper section allows for easy deformation and stripping, creating a dynamic response to infant feeding actions that mimics natural breast-feeding mechanics
3Object-affected harmful factors
If a large valve element area is provided at the bottom, then air intake at small pressure differences is enabled preventing colics, but the bottom region size must be increased
Solution Approach 1:
The conical bottle jacket design creates an asymmetric distribution of volume, concentrating the increased bottom area in a localized region without proportionally increasing the overall bottle volume. The gradual tapering from the widened bottom to the narrower upper section allows the valve element area to be increased by 50-100% while the total bottle volume increases by only 20-40%, maintaining compact dimensions suitable for infant use
Solution Approach 2:
The invention achieves a larger valve element area by changing the vertical dimensional distribution of the bottle jacket, creating a conical shape with a widened base. This dimensional reconfiguration allows the bottom surface area to be significantly increased while the height and overall volume remain constrained, effectively decoupling the valve area from the total bottle volume through geometric optimization
4Ease of manufacture
If the teat wall thickness is uniform, then manufacturing is simple, but the teat cannot simulate the soft breast texture and prevent collapse simultaneously
Solution Approach 1:
The teat is manufactured with spatially varying wall thickness, featuring a thicker lower section (approximately 2-3mm) for structural stability and collapse prevention, and a thinner upper section (approximately 1-2mm) for softness and easy stripping. This local quality variation enables the single teat component to simultaneously fulfill multiple functional requirements that would otherwise require multiple parts, while remaining manufacturable through injection molding with variable thickness tooling
Solution Approach 2:
The teat design implements a gradient change in the wall thickness parameter along its height, transitioning from a uniform thickness structure to a variable thickness structure. This parameter variation allows the teat to exhibit different mechanical properties at different locations - stiffer at the base for stability and softer at the nipple for breast simulation - while being produced as a single integrated component through controlled injection molding parameters
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 colics by allowing air intake without negative pressure, facilitates easy cleaning, and extends breast-feeding periods by simulating natural feeding closely, making it easier for infants to access milk without strong suction.
Implementation Method 1
a base cap (8) having an air intake valve (13) fastened to a bottom-side end region (4) of the bottle jacket (2)... allowing pressure equalization and preventing vacuum formation
Implementation Method 2
the bottle jacket (2) has a substantially conical shape widening from a teat-side end region (3) to its bottom-side end region (4)... prevents negative pressure formation
Implementation Method 3
a teat (9) fastened to the opposite, teat-side end region (3)... resilient teat design that mimics the breast, allowing pressure equalization
Data Source
AI summary
A bottle, in particular a baby's bottle, having a bottle jacket that is open at both ends. A base cap that is equipped with an air intake valve is fixed in one base end region of the bottle jacket and a teat is fixed in the opposite teat end region. The teat has a shaft and a nipple connected to the shaft by a lip contact region. The bottle jacket has an essentially conical form that widens from the teat end region to the base end region and the wall thickness of the shaft of the teat is greater than the wall thickness of the teat in the lip contact region and of the nipple. The bottle jacket is injection-molded from a polyolefin, in particular polypropylene.