Pneumatic Power Pack for Medicament Delivery
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Solution Overview
Problem
Existing automatic injection devices for medicament delivery are complex and expensive to manufacture, particularly when designed to eject medicament at a substantially constant force, necessitating a cost-effective solution while maintaining reliability.
Innovation Solution
A pneumatic power pack comprising a pressurized gas container and an activation assembly with a rupturer, activator, and rotator, which releases pressurized gas to propel the plunger forward, ensuring a reliable and user-friendly drug delivery device at a reduced manufacturing cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex mechanisms are used to eject medicament at substantially constant force, then the force consistency is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The patent employs a spring-driven mechanism that utilizes elastic potential energy storage and release to achieve substantially constant force delivery during medicament ejection. The spring mechanism transforms mechanical energy in a controlled manner, providing consistent force without requiring complex pneumatic or hydraulic systems.
Solution Approach 2:
The patent changes the physical state and mechanical properties of the spring mechanism to optimize force delivery. By carefully selecting spring characteristics and mechanical advantage ratios, the system achieves substantially constant force output throughout the ejection process, simplifying the overall device design while maintaining reliability.
2Reliability
If complex mechanisms are used to eject medicament at substantially constant force, then the force consistency is improved, but the manufacturing cost increases
Solution Approach 1:
The spring-driven mechanical system replaces complex pneumatic or hydraulic force-control mechanisms, significantly reducing manufacturing cost while maintaining substantially constant force delivery. The mechanical spring system uses readily available components and simple assembly procedures.
Solution Approach 2:
The patent employs a disposable or single-use spring mechanism that can be manufactured at low cost using standard manufacturing techniques. This approach eliminates the need for expensive, precision-controlled force delivery systems while ensuring consistent performance throughout the device's service life.
3Ease of manufacture
If simple mechanisms are used to propel the plunger, then the manufacturing cost is reduced, but the ability to deliver constant force deteriorates
Solution Approach 1:
The patent optimizes the mechanical parameters of the spring system, including spring constant, pre-compression distance, and lever arm ratios, to achieve substantially constant force output. These parameter adjustments transform a simple spring mechanism into an effective constant-force delivery system without increasing manufacturing complexity.
Solution Approach 2:
The patent employs curved or angled surfaces in the plunger engagement mechanism to distribute force more evenly during ejection. This geometric modification helps maintain substantially constant force delivery while keeping the overall mechanism simple and cost-effective to 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
The pneumatic power pack provides a cost-effective means to propel the plunger forward, ensuring a reliable and intuitive medicament delivery with a substantially constant force, thereby reducing the manufacturing costs of automatic injection devices.
Implementation Method 1
a pressurized gas container storing pressurized gas
Data Source
AI summary
A pneumatic power pack for a medicament delivery device is presented having a pressurized gas container storing pressurized gas and an activation assembly for releasing the pressurized gas from the gas source. The activation assembly including a rupturer having a sharp end, an activator, and a rotator coupled with the activator and the gas container. The activator is configured to move from a first position toward a second position to causes a rotation of the rotator which then drives the gas source towards the sharp end of the rupturer to release the pressurized gas.