Inoculating Stylus Retention and Cleaning Mechanism
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Solution Overview
Problem
Existing automatic inoculating devices are complex, costly, and require delicate maintenance, with unsatisfactory reliability and inconsistent inoculation patterns, and lack efficient cleaning mechanisms.
Innovation Solution
An automatic inoculating device featuring a rotatable turret and arm with a flexible stylus system for precise sample deposition and cleaning, utilizing a motorized pump and reserves for disinfectant and rinse solutions, allowing for easy maintenance and tool-free stylus replacement, and enabling consistent pattern creation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stylus is dipped in multiple tanks for cleaning between inoculations, then contamination is avoided, but device complexity and maintenance difficulty increase
Solution Approach 1:
The patent combines multiple cleaning functions (disinfectant cleaning and sterile water rinsing) into a single integrated cleaning station. The stylus is cleaned sequentially using different fluids at the same station, eliminating the need for multiple separate tanks and reducing device complexity while maintaining reliable contamination prevention.
Solution Approach 2:
The cleaning station is designed to perform multiple cleaning functions using different fluids (disinfectant and sterile water) at a single location. This multi-functional approach allows the same station to handle both disinfection and rinsing operations, simplifying the overall device structure.
2Ease of operation
If the stylus is moved linearly through a drive rack with multiple positions, then cleaning stations are accessible, but the number of lowering and raising operations increases
Solution Approach 1:
Instead of moving the stylus linearly through multiple positions with repeated lowering and raising operations, the patent inverts the approach by using a rotatable arm that swings the stylus in an arc. This allows the stylus to access different stations (sample collection, inoculation, cleaning) through rotational motion rather than linear reciprocating motion, reducing the number of lowering and raising operations.
Solution Approach 2:
The patent employs a dynamic rotatable arm mechanism that can swing the stylus between different positions. This dynamic system allows flexible access to various stations through controlled rotation, improving operational efficiency compared to a static linear drive rack system.
3Manufacturing precision
If the stylus is retained in a fixed housing, then positioning is stable, but tool-free replacement becomes difficult
Solution Approach 1:
The stylus assembly is segmented into separable components that can be easily removed and replaced. The stylus is designed as a distinct module that can be detached from the housing without tools, allowing quick replacement while maintaining precise positioning through standardized mounting features.
Solution Approach 2:
The stylus is designed as a disposable or easily replaceable component with a simple retention mechanism. This allows rapid replacement without tools, treating the stylus as a consumable item that can be quickly swapped out to maintain system functionality and precision.
Data Source
AI summary
An automatic inoculating system for depositing a sample on a substrate in a predetermined pattern. A turret is rotatable about a vertical axis, and an arm retained by the turret is pivotable about a horizontal axis. A stylus retained at a distal portion of the arm sucks up and dispenses the sample, such as by use of a pumping system in fluidic communication with the stylus. A support rotatably retains the substrate. The arm can be raised and lowered, such as by a cylinder on which the arm rests without a retaining mechanical connection therebetween. The arm can thus freely lift off the cylinder as when the stylus contacts the surface of the substrate. The sample can thus be deposited on the substrate in a predetermined pattern by a dispensing from the stylus in combination with rotation of the turret and the substrate and a pivoting of the arm.