Inline Lever Dispenser for Ergonomic Sauce Portioning
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Solution Overview
Problem
Existing fluent material dispensers in Quick Service Restaurants are ergonomically poor, inefficient, and prone to contamination, with issues such as two-handed operation, obstructed views, wasteful dispensing, and complex designs that complicate accurate and safe dispensing of sauces and condiments.
Innovation Solution
A dispensing system featuring a bottle with a plunger and a lever-operated dispensing mechanism where the handle is aligned with the bottle axis, allowing one-handed operation, adjustable portioning, and a modular design for efficient storage and easy cleaning, reducing user fatigue and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a gun-style dispenser with handle/trigger perpendicular to discharge direction is used, then dispensing mechanism is simple, but user accuracy and comfort deteriorate due to two-handed operation requirement and wrist fatigue
Solution Approach 1:
The handle/trigger mechanism is inverted from the conventional gun-style perpendicular arrangement to an inline configuration where the handle extends along the discharge direction. This allows the user to hold the dispenser naturally in one hand with the thumb operating the trigger, eliminating the need for two-handed operation and wrist stabilization while maintaining mechanical simplicity
2Ease of operation
If handle/trigger projects away from sides of container, then dispensing mechanism is accessible, but storage space efficiency deteriorates due to interference with adjacent dispensers
Solution Approach 1:
The handle/trigger assembly is designed with asymmetric orientation where the handle extends forward along the discharge axis rather than projecting sideways. This asymmetric configuration reduces the lateral footprint of the dispenser, allowing multiple units to be stored closely together on preparation racks or in refrigerators without interference, while the trigger remains easily accessible to the user's thumb
3Stability of the object's composition
If dispenser stands upright on non-dispensing end, then storage is stable, but food safety deteriorates due to exposure of dispensing end to contamination and content flow to non-dispensing end
Solution Approach 1:
The dispenser is inverted from conventional upright storage to horizontal storage with the dispensing end elevated. The discharge opening faces upward, preventing contamination from contacting the dispensing surface while also preventing fluent material from flowing backward to the non-dispensing end. This configuration maintains storage stability through proper structural support while eliminating food safety hazards
4Measurement precision
If piston relies on perfect seal with container wall, then dispensing control is improved, but ease of operation worsens due to requirement for extreme filling accuracy to prevent air pockets
Solution Approach 1:
The sealing function is extracted from the piston and transferred to a dedicated seal ring positioned at the discharge end of the dispenser. This seal ring creates a reliable barrier between the fluent material and the external environment without requiring the piston to maintain a perfect seal against the container wall. Users can fill the container without concern for air pockets, as the seal ring ensures proper sealing during dispensing operation
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 system enables ergonomic, accurate, and efficient dispensing of fluent materials with reduced waste and improved food safety, allowing for easy volume adjustments and compact storage, enhancing productivity and storage efficiency.
Implementation Method 1
the plunger is configured to frictionally engage the inner sidewalls of the bottle to a degree sufficient for holding the plunger substantially in place against a force oriented opposite the first direction, the force applied by the dispensing mechanism due to return motion of the lever from the engaged position to the rest position
Implementation Method 2
a plunger configured for sliding engagement with inner sidewalls of the bottle, the plunger further configured to exert a compressive force on the fluent material when travelling through the bottle interior in a first direction, thereby facilitating expulsion of the fluent material through an outlet of the bottle
Data Source
AI summary
A fluent material dispensing system comprising: a bottle, a plunger engaged inside the bottle, and a dispensing mechanism having a lever for operation of the plunger for fluid expulsion. The plunger may frictionally engage the bottle to a degree sufficient for holding the plunger in place against a force applied due to return motion of the lever. The dispensing mechanism may comprise a cap for attachment to an end of the bottle opposite a fluid outlet and a handle attached to the cap, the lever pivotally coupled to the cap, the lever and the handle aligned with the bottle. The dispensing mechanism may comprise a portioning mechanism configured to limit distance travelled by the lever from the rest position to the engaged position to a defined amount, thereby limiting expulsion of the fluid to a corresponding defined portion.