Cap With Peripheral Pressurization Holes for Viscous Fluids
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Solution Overview
Problem
Existing caps for containers with viscous contents face issues in smooth discharge and maintaining a sealed state, as they often require manual operation and can lead to oxidation or mold due to incomplete sealing and residue adherence.
Innovation Solution
A cap made of synthetic resin with an annular wall section extending obliquely and a check valve that elastically deforms under internal pressure to facilitate smooth discharge and automatically seal the container, using a guiding tubular body and circulation groove to return undischarged contents without manual operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the pressurization hole/liquid outlet hole is provided substantially in the center of the base end section forming the valve chamber, then the valve body can be moved upward by internal pressure, but the viscous contents cannot be smoothly discharged and the valve body cannot be smoothly moved upward
Solution Approach 1:
The patent changes the position of the pressurization hole from the center to the peripheral portion of the base end section, and adds a plurality of pressurization holes arranged in the circumferential direction. This dimensional change in hole arrangement enables both smooth valve body movement and effective viscous contents discharge by distributing pressure across multiple points.
Solution Approach 2:
The patent divides a single central pressurization hole into multiple peripheral pressurization holes. This segmentation allows the internal pressure to act at multiple locations simultaneously, improving both the valve body's upward movement and the discharge of viscous contents through distributed pressure application.
2Reliability
If the check valve is operated after the contents are discharged, then the valve member closes the discharge hole to maintain sealed state, but the undischarged contents remain in the discharge passage and may be scattered or adhered
Solution Approach 1:
The patent incorporates a circulation groove in the valve chamber wall that enables undischarged contents to be returned to the container before the valve member closes the discharge hole. This preliminary action of returning contents prevents waste and scattering while maintaining the sealed state, occurring automatically as part of the valve operation sequence.
3Force
If a coil spring made of metal is used in the valve device, then the valve body can be biased upward, but the device complexity increases and compatibility with food containers is reduced
Solution Approach 1:
The patent changes the material parameter from metal coil spring to elastic resin, and changes the structural parameter from a separate spring component to an integrated elastic piece formed as part of the valve body. This eliminates the need for additional metal components, reducing device complexity and improving food container compatibility while maintaining the necessary biasing force.
Solution Approach 2:
The patent merges the elastic piece with the valve body, forming them as a single integrated component made of elastic resin. This combination eliminates the separate coil spring and reduces overall device complexity while maintaining the biasing function necessary for valve operation.
4Ease of manufacture
If the cap body is made of synthetic resin, then the manufacturing cost is reduced and ease of manufacture is improved, but the sealing reliability may be compromised
Solution Approach 1:
The patent uses synthetic resin for the cap body while incorporating an elastic piece made of elastic resin with specific elastic properties. This composite material approach allows the cap body to be easily manufactured from synthetic resin while the elastic piece provides the necessary sealing and biasing functions, maintaining reliability without compromising ease of manufacture.
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
Enables quick and complete discharge of viscous contents and maintains the container sealed, preventing air entry and residue adherence, improving usability and reducing waste.
Implementation Method 1
When the internal pressure of the container is released, each elastic piece of the check valve is restored. Therefore, the valve member closes the discharge hole and the sealed state of the container is maintained.
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
Provided is a cap capable of smoothly discharging the contents to the outside and maintaining a container in a sealed state without user's operations by hand. A cap body 4 of a cap 1a includes: a cylindrical inner wall section 19 to be fitted into an inner wall surface of a container mouth section 3; an annular wall section 10 that extends obliquely in an upper direction toward a radial-direction center integrally from an inner wall surface of the cylindrical inner wall section 19, has a lower wall surface of a truncated conical shape, and has a discharge hole 25 in a radial-direction center portion; a check valve 12 disposed above the annular wall section 10 to open or close the discharge hole 25 in such a manner that a valve section 36 is detached from or seated on an annular valve seat 26 around the discharge hole 25; and a guiding tubular body 13 disposed above the check valve 12 and having a discharge passage 41 of contents from the discharge hole 25. Therefore, at the time of using the contents, the contents can be smoothly discharged to the outside. After the use of the contents, the sealed state of the container 2 can be maintained without user's operation by hand.