Biasing Mechanism for Consistent Fluid Discharge in Piston Pumps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid delivery devices for nasal, sub-lingual, or ophthalmic use rely on manual displacement of piston pumps, leading to inconsistent discharge due to varying user impulses and incomplete piston strokes, resulting in unpredictable and potentially partial fluid releases.
Innovation Solution
A fluid delivery device incorporating a piston pump with a biasing mechanism and trigger mechanism, where the trigger mechanism is actuated by a manually operated restraining member to ensure consistent and complete discharge, utilizing a biasing mechanism to ensure predictable loading and impulse on the piston pump, preventing partial discharges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual displacement of piston pump is used, then device simplicity is maintained, but discharge consistency deteriorates
Solution Approach 1:
The biasing mechanism automatically provides the force needed to move the piston pump during triggering, eliminating the need for the user to manually displace the piston. The system serves itself by using the biasing mechanism's stored energy to complete the discharge action, ensuring consistent full-stroke operation regardless of user strength or technique.
Solution Approach 2:
The biasing mechanism acts as an intermediary between the trigger mechanism and the piston pump. When the user activates the trigger, the biasing mechanism mediates the force transmission to ensure the piston receives a consistent, sufficient impulse for complete discharge, bridging the gap between simple user input and reliable output.
2Device complexity
If manual piston displacement is used, then device complexity is reduced, but discharge completeness deteriorates
Solution Approach 1:
The biasing mechanism is pre-loaded or pre-positioned in a state that allows it to automatically propel the piston during triggering. This preliminary preparation ensures that when the trigger is activated, the piston receives sufficient force to complete the full discharge stroke without requiring additional manual effort from the user.
3Ease of operation
If varying user impulses are applied, then ease of operation is maintained, but discharge predictability deteriorates
Solution Approach 1:
The trigger mechanism provides tactile feedback to the user, allowing them to intuitively apply the correct amount of force without needing to know precise activation parameters. The mechanism itself regulates the force transmission through the biasing mechanism, ensuring that variations in user input do not translate to variations in discharge output.
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 device ensures consistent and complete fluid discharge with predictable loading and impulse, preventing partial discharges and improving user independence in operation, making it simpler and more reliable for fluid delivery.
Implementation Method 1
a biasing mechanism; the biasing mechanism acting on the casing of the piston pump to bias the casing towards the outlet of the housing
Data Source
AI summary
A fluid delivery device for discharging a fluid having a housing, a piston pump, a biasing mechanism, and a trigger mechanism. The housing has a fluid discharge outlet. The pump has a pump chamber casing for fluid storage, a piston sliding in the pump chamber, a piston plunger, and a delivery channel leading to the housing outlet. The biasing mechanism biases the piston pump casing towards the housing outlet. The trigger mechanism has a catch member and a restraining member movable by a manually actuatable trigger from a cocked to a triggered configuration. The cocked restraining member engages the catch member to prevent movement and fluid discharge. A triggered restraining member disengages from the catch member for movement of the casing towards the housing outlet to discharge fluid from housing outlet.