Mechanical Insulin Pump Actuator Design
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Solution Overview
Problem
Portable insulin pump devices are expensive due to their reliance on electronic components, making them inaccessible to many diabetes patients, who often resort to less efficient manual syringes for insulin delivery.
Innovation Solution
A low-cost, mechanically actuated insulin infusion pump that eliminates the need for electronic components by using a housing with a fluid reservoir, a dosing mechanism with an adjustable fluid chamber, and a mechanical actuator for fluid delivery, allowing for user-selectable dosage volumes without the need for batteries or motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If portable insulin pump devices use electronic components (batteries, microprocessor chips, motors, controllers), then fluid delivery control and automation are improved, but device cost and complexity increase significantly
Solution Approach 1:
The patent removes all electronic components (batteries, microprocessors, motors, controllers) from the insulin pump system, extracting the automation function entirely. The mechanical pump uses a simple plunger mechanism that can be manually operated, eliminating the need for complex electronic control systems while maintaining the core function of controlled fluid delivery.
Solution Approach 2:
The patent describes a disposable insulin pump system where the entire pump unit is designed to be discarded after use. This eliminates the need for expensive, complex electronic components that would need to be reused and maintained. The mechanical plunger design is simple enough to be manufactured at low cost as a single-use device.
2Measurement precision
If portable insulin pump devices use electronic components, then precision and reliability of insulin delivery are improved, but device cost increases
Solution Approach 1:
The patent replaces electronic control systems with a purely mechanical plunger-based delivery mechanism. The plunger is designed with precise mechanical features that ensure accurate insulin delivery through mechanical means alone, without requiring electronic sensors, motors, or controllers. The mechanical design inherently provides the necessary precision through its construction.
3Device complexity
If traditional manual syringes are used for insulin delivery, then device cost is reduced, but ease of operation and dosing precision deteriorate
Solution Approach 1:
The mechanical pump is designed to be easily operated by the patient themselves without requiring technical knowledge or complex procedures. The plunger mechanism provides intuitive manual operation, and the device includes features that automatically manage fluid delivery timing and dosage, reducing the operational burden on the user compared to traditional syringes.
Data Source
AI summary
A fluid infusion device, for delivery of a medication fluid to the body of a user, includes a housing, a fluid reservoir for the medication fluid, a dosing mechanism, an infusion component, and a mechanical actuator. The fluid reservoir and the dosing mechanism are located in the housing, and the dosing mechanism is coupled to receive the medication fluid from the fluid reservoir. The dosing mechanism has an adjustable fluid chamber that defines a variable dosage volume. The infusion component is coupled to the dosing mechanism to receive the medication fluid from the adjustable fluid chamber. The mechanical actuator is coupled to the dosing mechanism such that operation of the mechanical actuator causes the medication fluid to be expelled from the adjustable fluid chamber to the infusion component.