Spring-Assisted IV Bag Lift With Notched Height Locking
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Solution Overview
Problem
Conventional IV poles require users to manually lift heavy medical fluid bags, leading to patient injury and discomfort, especially for those receiving dialysis treatments who need to lift numerous bags over 1,000 times a year.
Innovation Solution
A mechanical lift with a housing, adjustment block, hook, stopper, and spring that allows for vertical adjustment of the hook to lift and position medical fluid bags without manual effort, reducing muscle activity and preventing injuries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional IV poles are used, then the structure is simple and easy to manufacture, but users must manually lift heavy medical fluid bags causing injury and discomfort
Solution Approach 1:
The spring mechanism automatically lifts the adjustment block to the next notch when the stopper is released, without requiring external power or complex control systems. The system uses the weight of the fluid bag itself to compress the spring during lowering, which then automatically propels the block upward when released, creating a self-service lifting mechanism.
Solution Approach 2:
The spring acts as a counterweight mechanism that opposes the gravitational force on the fluid bag. When the stopper is released, the compressed spring expands upward, providing an upward force that counteracts the weight of the fluid bag and automatically raises it to the next vertical position.
2Reliability
If manual lifting is required, then the device complexity is low, but patient injury and discomfort increase significantly
Solution Approach 1:
The mechanical lift performs the lifting action automatically through the spring mechanism, eliminating the need for users to manually lift heavy bags. This self-service capability ensures consistent, controlled lifting that prevents muscle strain and injury while requiring minimal user intervention—simply operating the stopper release.
Solution Approach 2:
The spring mechanism provides controlled, gradual lifting rather than sudden jerky movements. By compressing the spring during the lowering phase and then allowing controlled expansion during lifting, the system cushions the mechanical transition and prevents abrupt movements that could cause injury or discomfort.
3Adaptability or versatility
If vertical adjustment is enabled, then positioning flexibility improves, but the risk of dropping bags increases
Solution Approach 1:
The stopper is positioned to engage with the notch before the lifting action begins. When the user releases the stopper, the spring has already been compressed and is ready to immediately propel the adjustment block upward to the next notch. This preliminary positioning ensures controlled, predictable movement and prevents accidental drops during the transition.
Solution Approach 2:
Instead of lifting the bag continuously or requiring complex locking mechanisms, the system inverts the approach by using gravity to lower the bag and a stored spring force to lift it. The stopper engages notches in reverse sequence during lowering, and the spring automatically reverses the direction during lifting, creating a controlled bidirectional movement that enhances security.
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 mechanical lift reduces user effort and injury risk, enhances ergonomics, and minimizes the likelihood of dropping bags, thereby preventing fluid waste, floor damage, and related injuries, while maintaining ease of use and reducing associated costs.
Implementation Method 1
a spring disposed within the housing and exerting an upward force against the adjustment block to mechanically lift the adjustment block and the hook extending therefrom from a first vertical position at a first notch of the series of vertical adjustment notches to a second notch of the series of vertical adjustment notches
Data Source
AI summary
A mechanical lift includes a housing defining a series of vertical adjustment notches, an adjustment block disposed within the housing, a hook extending from the adjustment block and configured to support a hanging load, a stopper supported by the adjustment block and movable between retracted and extended positions, and a spring disposed within the housing and exerting an upward force against the adjustment block to mechanically lift the adjustment block and the hook extending therefrom from a first vertical position at a first notch of the series of vertical adjustment notches to a second notch of the series of vertical adjustment notches when the stopper is in the retracted position. In the retracted position, the stopper is disengaged from the housing. In the extended position, the stopper is engaged with a selected notch to lock a vertical position of the adjustment block and the hook extending therefrom.