Compound Gear Roller for Viscous Liquid Dispensing
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Solution Overview
Problem
Existing delivery devices for flexible containers are complex and require high spring force to expel high viscosity liquids, making them inefficient for use with medicaments or other viscous substances.
Innovation Solution
A delivery device with a housing and rollers featuring compound gears with different diameters, allowing for torque amplification and reduced force requirement, enabling efficient dispensing of high viscosity liquids using a simpler mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a constant force spring is used to move the roller over the flexible container, then the liquid can be dispensed, but a large spring force is required for high viscosity liquid medicaments
Solution Approach 1:
A gearwheel mechanism is introduced as an intermediary between the actuator and the roller. The gearwheel translates linear actuator movement into rotational roller movement, providing mechanical advantage and reducing the force required from the spring while maintaining the ability to dispense high viscosity liquids.
Solution Approach 2:
The patent changes the mechanical parameters of the system by introducing a gearwheel with specific tooth configuration and radius. This parameter change creates a mechanical advantage ratio that reduces the required spring force while maintaining the dispensing function for high viscosity liquids.
2Productivity
If the roller moves quickly over the flexible container, then the dispensing process is faster, but high viscosity liquids require more force to be expelled
Solution Approach 1:
The gearwheel acts as a mediator that decouples the relationship between actuator speed and roller speed. By adjusting the gearwheel parameters, the system can achieve adequate dispensing speed while using a reduced force mechanism, as the gear ratio provides mechanical advantage.
Solution Approach 2:
The system transitions from a direct linear motion system to a dynamic rotational system through the gearwheel. This allows the roller to rotate and squeeze the flexible container in a controlled manner, optimizing both speed and force requirements for high viscosity liquid dispensing.
3Device complexity
If a simple linear actuator mechanism is used, then the device complexity is reduced, but it cannot provide sufficient mechanical advantage for high viscosity liquids
Solution Approach 1:
The gearwheel is introduced as a minimal-complexity intermediary that provides the necessary mechanical advantage. Rather than using a complex multi-component mechanism, the single gearwheel element delivers the force multiplication needed for high viscosity liquids while adding only minimal structural 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 device effectively delivers high viscosity liquids with less operational force, simplifying the mechanism and improving efficiency compared to prior art.
Implementation Method 1
a first roller (11) having a first compound gear (11b) comprising a first gearwheel (16) provided with first gearwheel teeth (18) and a second gearwheel (20) provided with second gearwheel teeth (22), and an actuator (5) comprising an actuator first linear gear (10) provided with actuator first linear gear teeth (10a), wherein the first gearwheel teeth (18) are configured to mesh with the housing first linear gear teeth (4a)
Implementation Method 2
the second gearwheel teeth (22) are configured to mesh with the actuator first linear gear teeth (10a)
Implementation Method 3
the actuator (5) is configured to be moved linearly from a first position to a second position along a longitudinal axis defined by the longitudinal extension of the housing first linear gear (4), causing the first roller (11) to be translated along the housing first linear gear (4), to squeeze liquid from the flexible container (14)
Implementation Method 4
the first gearwheel (16) has a diameter which differs from that of the second gearwheel (20)... The torque provided by the first roller will however be amplified
Data Source
AI summary
A delivery device for delivering liquid from a flexible container is presented having a housing having a first wall provided with a housing first linear gear having housing first linear gear teeth, the housing being configured to receive the flexible container, a first roller having a first compound gear having a first gearwheel provided with first gearwheel teeth and a second gearwheel provided with second gearwheel teeth, and an actuator comprising an actuator first linear gear provided with actuator first linear gear teeth, wherein the first gearwheel teeth are configured to mesh with the housing first linear gear teeth and the second gearwheel teeth are configured to mesh with the actuator first linear gear teeth, wherein the actuator is configured to be moved linearly from a first position to a second position along a longitudinal axis defined by the longitudinal extension of the housing first linear gear.