Handheld Spreader Removable Sifter Refill Mechanism
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Solution Overview
Problem
Shaker-type handheld spreaders are difficult to refill due to the sifter blocking the open end of the container, making them often suitable for single-use applications, and they lack the ability to use a scoop without the sifter assembly in place.
Innovation Solution
A handheld spreader design with a removable sifter assembly that allows the scoop to remain attached to the cup, enabling easy refilling and use with or without the sifter, featuring a scoop assembly and sifter assembly that can be configured to meter particulate material and direct it onto a surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sifter assembly is permanently attached to block the open end of the cup, then particulate material can be effectively sifted and metered during distribution, but the cup cannot be easily refilled and the scoop cannot be used independently
Solution Approach 1:
The sifter assembly is divided into separate components: a sifter body that attaches to the cup and a removable sifter assembly that can be detached. This segmentation allows the sifting function to remain reliable while enabling easy refilling by simply removing the sifter assembly from the cup opening.
Solution Approach 2:
The sifter assembly is designed to be extractable from the cup opening. The sifter assembly can be removed from the cup, allowing the cup to be refilled without removing the entire scoop assembly. This extraction principle resolves the contradiction by separating the sifting function from the cup structure.
2Ease of manufacture
If the entire scoop assembly must be removed to refill the cup, then the sifter assembly can be accessed, but the scoop loses its functionality and cannot be used during filling
Solution Approach 1:
The scoop assembly is segmented into a permanent scoop portion attached to the cup and a removable sifter assembly. This allows the scoop to maintain its functionality during refilling while the sifter assembly can be removed for refilling operations.
Solution Approach 2:
Only the sifter assembly is extracted from the cup opening during refilling, while the scoop remains attached and functional. This selective extraction allows the scoop to continue serving its purpose during the refilling process.
3Measurement precision
If the sifter assembly is designed to meter particulate material, then distribution precision is improved, but the device complexity increases and the scoop cannot function independently
Solution Approach 1:
The metering function is isolated in a separate sifter assembly that can be attached to or removed from the cup. This segmentation allows the metering precision to be maintained when needed while reducing overall device complexity by allowing the scoop to function independently when the sifter assembly is removed.
Data Source
AI summary
Handheld spreaders and methods of operating the same. The spreader can include a cup to hold particulate material and having an open upper end, a scoop assembly provided proximate the open upper end of the cup and including a scoop for directing particulate material being dispersed from the cup, and a sifter assembly removably coupled to the scoop assembly for metering an amount of the particulate material being dispersed from the cup. When the sifter assembly is removed from the scoop assembly, the scoop remains attached to the cup to direct particulate material being provided into the cup via the open upper end. The method can include opening the cup by removing the sifter assembly from the scoop assembly, placing particulate material into an open interior of the cup, closing the cup by replacing the sifter assembly, and dispersing the particulate material through the sifter assembly.