Disposable Pump with Rolling Diaphragm for Sterile Dosing
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Solution Overview
Problem
Existing positive displacement dosing systems require time-consuming and costly clean-in-place and sterilize-in-place operations, which increase the risk of contamination during sterile applications, and wear of piston units can contaminate fluids.
Innovation Solution
A disposable positive displacement dosing system with a rolling diaphragm and piston drive unit, fully sealed and made from low-cost materials, eliminating the need for manual disassembly and allowing sterilization before use, reducing exposure to harmful fluids and minimizing contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual disassembly, cleaning and re-assembly operations are performed, then the pump system can be maintained, but time is subtracted from operation and contamination risk increases
Solution Approach 1:
The pump system is designed as a disposable unit that is sterilized before use and then discarded after a single use. This eliminates the need for manual disassembly, cleaning and re-assembly operations, thereby preventing time loss and contamination risks associated with maintenance operations while maintaining sterility reliability.
Solution Approach 2:
The pump system is pre-sterilized before use, so that when it is deployed, it is already in a sterile state ready for operation. This preliminary sterilization action eliminates the need for on-site cleaning and maintenance operations, saving time and preventing contamination during operation.
2Reliability
If clean-in-place and sterilize-in-place operations are performed, then sterility is maintained, but operational efficiency decreases
Solution Approach 1:
The pump system is designed as a disposable unit that is sterilized before use and then discarded after a single use. This eliminates the need for time-consuming clean-in-place and sterilize-in-place operations, thereby maintaining sterility reliability while significantly improving operational efficiency and productivity.
Solution Approach 2:
The pump system is pre-sterilized before use, so that when it is deployed, it is already in a sterile state ready for operation. This preliminary sterilization action eliminates the need for on-site cleaning and sterilization operations, saving time and improving operational efficiency while maintaining sterility.
3Device complexity
If piston drive unit is used without rolling diaphragm, then structure is simpler, but frictional wear causes fluid contamination
Solution Approach 1:
The rolling diaphragm acts as an intermediary component between the piston drive unit and the fluid chamber. It separates the mechanical piston drive unit from the fluid, preventing frictional wear and contamination while allowing the piston to effectively drive the diaphragm. This intermediary element solves the contamination problem without significantly increasing overall system complexity.
Solution Approach 2:
The rolling diaphragm is a flexible membrane that separates the piston drive unit from the fluid chamber. This flexible barrier prevents direct contact between the mechanical components and the fluid, eliminating frictional wear and contamination while maintaining a relatively simple pump structure.
4Object-generated harmful factors
If rolling diaphragm is used, then fluid is protected from contamination, but device complexity increases
Solution Approach 1:
The rolling diaphragm acts as an intermediary component between the piston drive unit and the fluid chamber. It separates the mechanical piston drive unit from the fluid, preventing frictional wear and contamination while allowing the piston to effectively drive the diaphragm. This intermediary element solves the contamination problem without significantly increasing overall system 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 system ensures contamination-free and efficient fluid delivery by eliminating the need for clean-in-place and sterilize-in-place procedures, reducing operational downtime and protecting operators from hazardous fluids.
Implementation Method 1
The rolling diaphragm provides a leakproof seal for the fluid within the pump
Implementation Method 2
It also ensures gentle handling of the fluid to be delivered by minimizing the shearing of molecules within the liquid
Implementation Method 3
a piston drive unit configured to reciprocally drive the rolling diaphragm to move fluid in or out of the fluid chamber
Data Source
AI summary
A positive displacement dosing system and method of dispensing a fluid including a plurality of disposable positive displacement pumps. The disposable positive displacement pumps each include a pump body having head portion and a base portion, with the head portion having one or more fluid passage openings. Each disposable positive displacement pump also includes a rolling diaphragm internal to the pump body and defining a fluid chamber within the pump body. The disposable positive displacement pump also includes a piston drive unit configured to reciprocally drive the rolling diaphragm to move fluid in or out of the fluid chamber. The positive displacement dosing system includes tubing connecting the fluid reservoir to the disposable positive displacement pump.