Push-Twist End Cap Assembly for Dual-Opening Water Bottle
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Solution Overview
Problem
Conventional reusable water bottles with a single open end are difficult and time-consuming to clean thoroughly, allowing biofilm and disease-causing bacteria to accumulate in hard-to-reach areas.
Innovation Solution
A water bottle design that opens at both ends, featuring a push-twist end cap assembly with a tongue-and-groove connection between inner and outer lids, facilitating easy access and complete cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a water bottle has only one open end with a cap, then the sealing structure is simple, but it is difficult and time-consuming to clean thoroughly
Solution Approach 1:
The bottle is divided into two open ends, each with its own cap assembly, allowing cleaning access from both sides. This segmentation enables the cleaning solution to enter and circulate through the entire bottle interior, reaching all surfaces including the bottom and cap interfaces that would be inaccessible in a single-opening design.
2Device complexity
If a water bottle has a single open end, then the structure is simpler, but biofilm and bacteria can accumulate in hard-to-reach areas
Solution Approach 1:
By creating two separate openings with independent cap assemblies, the design eliminates dead zones where biofilm and bacteria could accumulate. The dual-opening configuration allows cleaning agents to flow through the entire interior volume, ensuring all surfaces including corners and interfaces are reached and sanitized.
3Ease of operation
If a water bottle opens at both ends, then complete cleaning is enabled, but the end cap assembly structure becomes more complex
Solution Approach 1:
The cap assembly employs a nested structure where an outer cap and an inner cap are positioned concentrically, with the inner cap containing the sealing elements and the outer cap providing structural support and threading. This nesting allows the complex multi-component assembly to be compact and integrated, reducing the effective complexity despite the enhanced cleaning functionality.
4Ease of operation
If a water bottle has a push-twist end cap assembly, then ease of opening is improved, but the mechanism complexity increases
Solution Approach 1:
The push and twist functions are merged into a single integrated cap assembly mechanism. The outer cap provides the pushing interface while the threaded engagement with the bottle body enables the twisting motion, combining two operational modes into one unified structure that reduces overall mechanism complexity.
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
Ensures complete cleaning of the bottle, preventing biofilm and bacteria buildup by allowing access to all parts, enhancing hygiene and ease of maintenance.
Implementation Method 1
an outer lid having a structure on a circumferential top surface forming a plurality of projections. When the outer lid is pushed onto the inner lid, the plurality of projections are configured to form a tongue-and-groove connection with the plurality of grooves or notches
Implementation Method 2
An end cap assembly includes an inner lid having a threaded portion to engage the threaded portion on the first end of the body
Data Source
AI summary
A water bottle includes a body having a threaded portion on a first end and an end cap assembly. The end cap assembly includes an inner lid having 1) a threaded portion to engage the threaded portion on the first end of the body and 2) a circular flange or rim having a structure extending downwardly, thereby forming a plurality of grooves or notches; and an outer lid having a structure on a circumferential top surface forming a plurality of projections.