Embedded PCB Elastomeric Plunger for Drug Delivery Reservoirs
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Solution Overview
Problem
Conventional plungers for administering materials have a large footprint and unused interior space, limiting their efficiency in sealing and ejecting substances from reservoirs.
Innovation Solution
Integration of a printed circuit board (PCB) and electronic components within an elastomeric plunger, which is secured to a plunger rod and configured to seal the reservoir, allowing for slidable advancement and minimizing dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If a conventional elastomeric plunger is used to seal the reservoir, then sealing function is achieved, but the plunger occupies excessive space and leaves unused interior volume
Solution Approach 1:
The patent combines the sealing plunger and the electronic circuit board into a single integrated assembly. The PCB is embedded within the elastomeric plunger, merging two previously separate components (sealing element and electronic platform) into one unified structure that eliminates dead space while maintaining sealing reliability
Solution Approach 2:
The elastomeric plunger serves multiple functions simultaneously: it provides sealing against the reservoir wall, supports the electronic circuit board, and enables electronic functionality. This multi-functionality reduces the need for separate components and optimizes space utilization
2Volume of stationary object
If the plunger footprint is reduced to optimize space, then unused interior space decreases, but sealing effectiveness may be compromised
Solution Approach 1:
The elastomeric material is strategically positioned only where sealing is required (at the interface with the reservoir wall), while the interior portion of the plunger is replaced with the embedded PCB. This local application of elastomeric material maintains seal integrity while minimizing overall plunger footprint and eliminating unused space
3Adaptability or versatility
If electronic components are added to the plunger, then functionality is enhanced, but device complexity increases
Solution Approach 1:
The electronic circuit board is embedded within the elastomeric plunger, merging the electronic platform with the sealing structure. This integration eliminates the need for separate mounting mechanisms and reduces overall device complexity while enabling electronic functionality
Solution Approach 2:
The plunger assembly serves multiple functions: sealing, structural support, and electronic platform. By making the plunger multi-functional, the patent avoids adding separate components for each function, thereby enhancing versatility without proportionally increasing 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
The embedded PCB and electronic components enhance the plunger's functionality by providing a structural backbone and enabling electronic communication, reducing the plunger's footprint while maintaining a seal and optimizing material ejection.
Implementation Method 1
An elastomeric plunger extending from the distal end of the plunger rod is configured to sealingly engage a sidewall of the reservoir
Data Source
AI summary
A plunger assembly is configured for slidable advancement through a reservoir of a vessel containing a material to be administered. The plunger assembly includes a plunger rod having a distal end configured to be inserted into the reservoir. An elastomeric plunger extending from the distal end of the plunger rod is configured to sealingly engage a sidewall of the reservoir. At least one printed circuit board is embedded within the plunger, and at least one electronic component is electrically connected with the at least one printed circuit board.