Portion Dispenser Spindle-Piston Mechanism for Repeatable Dosing
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Solution Overview
Problem
There is a need for practical and cost-effective dispensers that can repeatedly dispense identical portions of flowable products, such as condiments and sauces, in the food industry.
Innovation Solution
The dispenser mechanism includes a reservoir with a piston movably fitted in a dispensing chamber, a spindle with helical features that advances the piston upon rotation, and a linkage connected to an operating handle, allowing for controlled dispensing of measured portions through outlet ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple dispenser structure is used, then manufacturing cost is reduced, but portion control precision and repeatability deteriorate
Solution Approach 1:
The dispenser is divided into separate functional modules: a removable reservoir for product storage, a dispensing chamber for portion formation, and a control mechanism with piston and spindle. This segmentation allows each component to be manufactured independently using cost-effective methods while maintaining precise portion control through the engineered interaction of these simple components.
Solution Approach 2:
The helical features on the piston and spindle create a self-regulating mechanism where rotation of the spindle automatically advances the piston a precise distance, and the piston's movement automatically dispenses a consistent portion through the outlet port. This self-service mechanism eliminates the need for complex electronic controls or calibrated adjustments, reducing manufacturing costs while ensuring repeatable portion sizes.
2Reliability
If a complex mechanism is used to achieve repeatable portions, then portion consistency is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces complex electronic or pneumatic control systems with a pure mechanical solution. The helical engagement between the piston and spindle creates a deterministic mechanical relationship where a fixed number of spindle rotations always advance the piston by the same distance, guaranteeing consistent portions through mechanical geometry rather than electronic control.
Solution Approach 2:
The spindle serves multiple functions: it rotates to advance the piston, it provides the operational interface for the user, and its helical features directly engage with the piston to convert rotational motion into linear displacement. This multi-functionality eliminates the need for separate actuators, linkages, or control systems, reducing overall device complexity while maintaining reliable portion consistency.
3Ease of operation
If a manual operation mechanism is used, then ease of operation is improved, but dispensing speed and productivity may deteriorate
Solution Approach 1:
The dispenser is designed for rapid periodic operation where the spindle can be quickly rotated back and forth to advance and retract the piston, enabling fast dispensing cycles. Each rotation cycle dispenses a portion in a fraction of a second, allowing high productivity through repeated rapid cycles while maintaining simple manual operation.
Solution Approach 2:
The mechanism allows dynamic operation where the user can rotate the spindle at any speed desired. For high productivity, the user can rapidly rotate the spindle to quickly dispense multiple portions. The mechanical design accommodates a wide range of operating speeds without compromising ease of use or portion precision, allowing the operator to optimize dispensing speed based on needs.
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 precise and repeatable dispensing of flowable materials, offering single-handed operation, ease of cleaning, and cost-effective manufacturing while ensuring consistent portion sizes.
Implementation Method 1
The spindle has helical features engaged with features on the piston. A linkage couples an operating handle to the spindle. The spindle is rotatable to advance the piston along the dispensing chamber in response to movement of the operating handle.
Data Source
AI summary
A dispenser for dispensing portions of flowable materials has a piston that is advanced along a dispensing chamber by rotation of a spindle that passes through the piston. A stop may limit travel of the piston to control the volume of flowable material dispensed. The stop may be adjustable. In an example hand-held dispenser the spindle is rotated by a rack and pinion mechanism that can be operated with one hand. The dispenser may be used, for example, for dispensing portions of condiments, sauces or the like.