Vibratory Nut Cracker With Adjustable Tapered Jaws
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Solution Overview
Problem
Current methods for cracking pecan nuts are inefficient due to varying shell thickness, length, and brittleness, leading to high kernel damage and contamination, especially when nuts of different cultivars are processed together, and the mechanical impact methods often result in broken nut meats and contamination from dorsal groove packing material.
Innovation Solution
A nut cracker apparatus with adjustable jaws that taper from inlet to outlet, allowing for rotational motion and vibratory drive to orient and roll nuts between jaws, reducing kernel damage by applying pressure and rolling motion rather than impact, and a system of ramps to facilitate shell cracking and kernel release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mechanical impact methods are used to crack pecan shells, then cracking speed is improved, but kernel damage and breakage increase
Solution Approach 1:
The patent applies mechanical vibration to crack pecan shells by subjecting them to vibratory motion that propagates through the shell structure, causing cracks to form and propagate without requiring high-impact forces. This vibration-based approach enables cracking at productive speeds while minimizing kernel damage and breakage that would result from traditional impact methods.
Solution Approach 2:
The cracking mechanism employs periodic vibratory action rather than single high-impact events. The repeated cyclic vibration allows the shell to crack gradually through accumulated stress, maintaining kernel integrity while achieving effective cracking. This periodic action prevents the sudden impact forces that cause kernel breakage.
2Device complexity
If fixed jaw configuration is used, then device simplicity is maintained, but inability to handle varying shell thickness and nut sizes reduces processing quality
Solution Approach 1:
The patent employs adjustable jaw configurations that can be dynamically modified to accommodate varying shell thicknesses and nut sizes. The jaw gap and positioning can be adjusted to match the specific characteristics of different pecan cultivars and shell conditions, ensuring consistent cracking quality across diverse nut types while maintaining reasonable device simplicity through modular adjustment mechanisms.
Solution Approach 2:
The device allows changing key parameters such as jaw gap distance, jaw positioning, and vibration amplitude to match the specific shell thickness and nut dimensions being processed. This parameter adjustment capability enables consistent cracking results across different pecan sizes and cultivars without requiring complete device redesign, balancing simplicity with adaptability.
3Productivity
If high impact force is applied to crack shells, then cracking efficiency is improved, but shell fragmentation and contamination increase
Solution Approach 1:
The vibratory cracking mechanism generates cracks through oscillatory motion that propagates stress waves through the shell structure. This approach achieves high cracking efficiency by utilizing the natural resonance and stress propagation of the shell material, avoiding the need for high-impact forces that cause shell fragmentation and contamination while maintaining productive processing speeds.
Solution Approach 2:
The patent replaces traditional high-impact mechanical cracking systems with a vibration-based mechanical system. Instead of using forceful impacts that shatter shells and create debris, the system uses controlled vibratory motion to propagate cracks through the shell structure, reducing shell fragmentation and contamination while maintaining cracking efficiency.
4Productivity
If traditional shelling methods are used, then processing speed is maintained, but kernel breakage and loss of unbroken nut meats increases
Solution Approach 1:
The vibratory cracking system processes pecans at high speeds while the gentle vibration-based cracking mechanism preserves kernel integrity. The vibration-induced cracks open the shells without subjecting the kernels to the high-impact forces that cause breakage, thereby maintaining both processing speed and high recovery of unbroken nut meats.
Solution Approach 2:
The vibration-based cracking approach acts as a cushioning mechanism that gradually opens shells through oscillatory stress rather than sudden impact. This beforehand cushioning effect protects the kernels from breakage during the cracking process, allowing high-speed processing while minimizing kernel loss and maximizing recovery of intact nut meats.
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 apparatus effectively reduces kernel damage and contamination by ensuring consistent cracking pressure and orientation, allowing for higher recovery of unbroken nut meats and minimizing shell fragmentation, with the ability to process nuts of varying sizes and cultivars with improved efficiency and reduced breakage.
Implementation Method 1
with the second jaw being movably supported by the frame and secured to drive means configured to rotatably move the second jaw relative to the first jaw, operatively to continuously change the size of the gap between a predeterminable minimum size and a predeterminable maximum size; with the tangential motion of the second jaw when the gap is at its minimum size being directed substantially towards the outlet and the tangential motion of the second jaw when the gap is at its maximum size being directed substantially towards the inlet to crack the shell of a stone fruit nut located between the jaws by repeatedly pressing and rolling the nut on its side between the jaws from the inlet to the outlet
Data Source
AI summary
Shown is an apparatus and method for cracking stone fruit nuts. The apparatus includes a frame (2) supporting a set of spaced apart jaw including a first jaw (4) and a second jaw (5) defining between them a gap (6), which is tapered down from the inlet (7) to the outlet (8). The first jaw (4) is adjustably secured to the frame (2) for adjustment of the size of the gap (6). The second jaw (5) is movably supported by the frame (2) and secured to drive means configured to rotatably move the second jaw (5) relative to the first jaw (4) with a tangential motion resulting in the continuously change of the size of the gap (6). To crack the shell, the stone fruit nut is located between the jaws and repeatedly pressed and rolled between the jaws from the inlet (7) to the outlet (8).