Breastpump Vacuum Control via Sensor Feedback
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Solution Overview
Problem
Conventional breastpumps struggle to maintain a consistent and controlled vacuum level due to variable breast and nipple tissue volumes, leading to inefficient milk expression and discomfort, as they rely on approximations rather than actual pressure sensing.
Innovation Solution
A breastpump with a pressure control system that regulates vacuum within the breastshield chamber, maintaining a minimum vacuum level of 20-60 mmHg and allowing precise control of pressure changes between set points, including less than ambient pressure, using a regulator and sensors to adapt to individual breast conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional breastpumps use displacement or accumulator pump types with fixed stroke lengths, then the pump structure is simple, but the vacuum level cannot be precisely controlled due to variable breast tissue volumes
Solution Approach 1:
The patent implements a feedback control system where a pressure sensor continuously monitors the actual vacuum level in the breastshield chamber and feeds this information back to the control system. The control system then adjusts the pump operation to maintain the desired vacuum level, resolving the contradiction between simple structure and precise control by adding intelligent feedback rather than complex mechanical adjustments
Solution Approach 2:
The invention replaces traditional mechanical vacuum control mechanisms (fixed stroke lengths, mechanical regulators) with an electronic control system that uses sensors and microprocessors to precisely regulate vacuum levels. This substitution allows for accurate pressure control adaptable to variable breast tissue volumes without being constrained by mechanical design limitations
2Loss of energy
If conventional breastpumps return the breast shield to atmospheric pressure at the end of each cycle, then the pump structure is simple, but energy is wasted and nipple rebound occurs
Solution Approach 1:
The patent maintains continuous vacuum application by avoiding complete return to atmospheric pressure. Instead, the system transitions between different vacuum levels (maximum vacuum for milk expression, minimum vacuum for comfort and energy saving) while maintaining negative pressure throughout. This continuous useful action eliminates energy-wasting atmospheric returns and prevents nipple rebound while preserving pumping effectiveness
Solution Approach 2:
The invention dynamically adjusts the vacuum level between maximum and minimum thresholds based on real-time sensor feedback and pumping phase requirements. This dynamic control allows the system to optimize between energy consumption and pumping effectiveness by maintaining appropriate vacuum levels without rigid fixed-point returns to atmosphere
3Adaptability or versatility
If conventional breastpumps use fixed vacuum levels, then the control system is simple, but the pump cannot adapt to different breast sizes and tissue elasticity
Solution Approach 1:
The patent implements a dynamic pressure control system that adjusts vacuum levels in real-time based on sensor feedback and pre-programmed pumping phases. The system transitions between maximum vacuum (for effective milk expression) and minimum vacuum (for comfort and energy saving) based on actual pressure measurements, allowing adaptation to different breast conditions without requiring complex manual adjustments for each user
Solution Approach 2:
The invention changes the pressure parameter dynamically during the pumping cycle, transitioning between different vacuum levels (maximum and minimum) based on the pumping phase and real-time sensor feedback. This parameter variation allows the system to adapt to different breast sizes and tissue elasticity by optimizing vacuum levels for each phase rather than using a fixed vacuum level throughout
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
This solution enables more efficient milk expression, reduced energy consumption, minimized nipple rebound, and enhanced comfort by maintaining a stable vacuum level, allowing for hands-free operation and consistent performance across different breast sizes and conditions.
Implementation Method 1
A vacuum pump mechanism (216) is attached to the assembly (210). The pump (216) creates a vacuum within a breastshield chamber
Implementation Method 2
They allow the nursing woman to express the breastmilk as necessary or convenient... breastpumps with a pressure control system to regulate the pressure as actually applied to the breast within a breastshield chamber during a pumping cycle
Implementation Method 3
The valve opens due to pressure differential to allow the milk accumulated above the valve to empty into the collection container
Data Source
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AI summary
A breastpump comprises a breastshield having a portion defining a chamber within which at least part of a woman's breast is received; a device detecting actual pressure within said breastshield chamber and generating signals indicative of said detected pressure, a controller, said controller operating said breastpump in response to signals from said device according to a determined program.