Maple Tap Sleeve for Sap Yield and Bacterial Control
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Solution Overview
Problem
Current maple sap harvesting systems face significant reductions in sap yields due to bacterial build-up in taps and tubing, which is laborious and costly to clean or requires wasteful disposal, and the material properties of taps affect sap flow.
Innovation Solution
A removably mounted tubular sleeve made from a food-grade, anti-bacterial material is inserted into the tap, allowing for easy replacement at the end of each season, reducing bacterial contamination and enabling the use of softer, more slippery materials that enhance sap flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If taps are reused across multiple seasons, then cost is reduced, but bacterial build-up increases causing significant sap yield loss
Solution Approach 1:
The tap is divided into two separable components: a reusable outer body and a disposable inner liner. The liner is removed and discarded after each season while the outer body remains in the tree and is reused. This segmentation allows the critical sap-contact surface to be replaced without removing the entire tap, resolving the contradiction between reuse and cleanliness.
Solution Approach 2:
The inner liner is designed as a low-cost, single-use component that is discarded after one season. This disposable element eliminates bacterial build-up issues while keeping the overall system cost-effective, as only the inexpensive liner is replaced rather than the entire expensive tap assembly.
2Reliability
If taps are cleaned with brush and cleaning fluid, then bacterial build-up is reduced, but labor and time increase significantly
Solution Approach 1:
Instead of investing time in cleaning reusable taps, the solution uses disposable liners that eliminate the need for cleaning entirely. The liner is simply removed and discarded, replacing a time-consuming cleaning process with a quick removal action.
Solution Approach 2:
The contaminable portion of the tap (the inner liner) is extracted as a separate removable component. This allows the liner to be easily taken out and discarded without affecting the permanent tap body, eliminating the need for thorough cleaning procedures.
3Productivity
If smaller inner diameter taps are used, then natural vacuum effect improves increasing sap yield, but sap flow resistance increases
Solution Approach 1:
The inner diameter of the liner is optimized to balance two competing factors: a smaller diameter enhances the natural vacuum effect and sap yield, while a larger diameter reduces flow resistance. The specific parameter (inner diameter) is carefully selected to achieve the optimal compromise between these two opposing requirements.
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 effectively prevents bacterial growth, increases sap yields by improving the natural vacuum effect, and allows for the reuse of taps while minimizing waste and costs.
Implementation Method 1
The tubular sleeve may be molded from a food-grade, anti-bacterial material
Implementation Method 2
Natural vacuum systems rely on the slope of the collection lines to creature negative pressure
Implementation Method 3
artificial vacuum systems employ a vacuum pump
Data Source
AI summary
A device for maple sap harvesting, which includes an assembly of a tubular sleeve which is removably mounted inside a tubular section of a tap. The tubular sleeve may be molded from a food-grade, anti-bacterial material. The tubular sleeve is inserted into the tap before the tap is driven into a maple tree. When the tap is removed from the tree at the conclusion of the sap harvest period, the sleeve may be discarded. The next season, a new sleeve is placed in the tap, with the new sleeve containing no residual bacterial contamination from the previous season of use.