Fluid Dispensing Member Variable Spray Profile
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Solution Overview
Problem
Conventional fluid dispenser pumps produce a spray with constant quality and shape regardless of the force applied by the user, lacking the ability to vary the spray characteristics based on actuation intensity.
Innovation Solution
The lateral outlet means of the actuating rod extend over an axial height greater than their radial width, featuring multiple separate side outlets or an elongated continuous outlet, allowing the passage section to change with actuation dynamics, resulting in varying pressure drops and spray profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single lateral orifice is used in the actuating rod, then the spray quality and shape remain constant regardless of user force, but the ability to vary spray characteristics based on actuation intensity is lost
Solution Approach 1:
The single lateral orifice is segmented into multiple separate lateral outlets (first, second, and third outlets) arranged axially at different positions. This segmentation allows the sleeve to selectively cover different numbers of outlets based on actuation force, enabling variable spray characteristics while maintaining reliable spray delivery through the remaining covered outlets.
Solution Approach 2:
The system transitions from a static single orifice to a dynamic multi-outifice configuration where the effective number of open outlets changes dynamically with actuation force. The sleeve moves axially to cover or uncover outlets in sequence, creating a dynamic adaptation of spray characteristics that responds to user input intensity.
2Adaptability or versatility
If the lateral outlet means extend over a large axial height, then spray characteristics can vary with actuation dynamics, but the radial width must be limited to maintain the axial dominance
Solution Approach 1:
The outlet configuration emphasizes the axial dimension over the radial dimension. By arranging multiple outlets axially at different heights and giving the outlet means a greater axial height than radial width, the system uses the axial dimension as the primary variable for controlling spray characteristics, rather than relying on radial area changes.
3Adaptability or versatility
If multiple separate side outlets are used, then spray dynamics can be controlled, but the device complexity increases
Solution Approach 1:
The sleeve serves multiple functions: it acts as a sealing element for the piston, a movable cover for the lateral outlets, and a spring-loaded actuator. This multi-functionality reduces the need for additional separate components to achieve the variable spray effect, thereby limiting the increase in device complexity despite having multiple outlets.
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 design enables the creation of a soft, long-lasting spray with gentle actuation and a powerful, short spray with vigorous actuation, faithfully reproducing the dynamics of user input in the spray profile.
Implementation Method 1
a sleeve slides under the effect of a precompression spring
Implementation Method 2
the pressure of the fluid product over a maximum axial stroke
Data Source
AI summary
A fluid product dispensing member, such as a pump, comprising a chamber (20) in which the fluid product is pressurised and an outlet valve through which the pressurised fluid product is discharged from the chamber (20), the outlet valve comprising an actuating rod (2) that is movable axially back and forth and on which a sleeve (33) slides under the effect of a precompression spring (5) and the pressure of the fluid product over a maximum axial stroke, the actual axial stroke of the sleeve (33) being dependent on the force of the precompression spring (5) and the pressure of the fluid product in the chamber (20), the actuating rod (2) comprising lateral outlet means (21, 22) capable of being selectively blocked and released by the sleeve (33), characterised in that the lateral outlet means (21, 22) of the actuating rod (2) extend over an axial height that is greater than the radial width thereof.