Gravel Recapturing Wheel Assembly for Road Graders
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Solution Overview
Problem
Existing road grading devices tend to push substantial amounts of gravel into adjacent ditches instead of spreading it uniformly, and existing solutions fail to recapture inadvertently displaced gravel effectively.
Innovation Solution
A gravel recapturing and sifting apparatus with rotatable wheel assemblies featuring radially arranged metal tines that kick up gravel towards the roadway while allowing grass and weeds to pass through, utilizing a framework mounted to a road grader with adjustable positioning to direct bulkier objects back onto the road and lighter objects to fall back into the ditch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a road grader uses an angled blade to spread gravel, then the grading operation can be performed, but substantial amounts of gravel are pushed into adjacent ditches instead of being spread uniformly
Solution Approach 1:
The apparatus performs preliminary action by positioning the wheel assembly to intercept and recapture gravel before it is permanently lost in the ditch. The wheel assembly is configured to reach into the ditch area and retrieve displaced gravel, preventing complete material loss and enabling recovery of previously misplaced materials.
Solution Approach 2:
The apparatus applies the discarding and recovering principle by collecting gravel that was previously discarded into the ditch. The wheel assembly with tines captures gravel from the ditch bottom and transports it back to the roadway, effectively recovering material that would otherwise be lost and requiring additional haul-away operations.
2Loss of substance
If the wheel assembly with tines kicks up material from the ditch, then gravel can be recaptured, but grass and weeds are also lifted and need to be separated
Solution Approach 1:
The apparatus applies local quality by giving different parts of the system different functions: the wheel assembly with tines is designed specifically for lifting and capturing gravel, while the gravity-fed separation area allows organic materials to be sorted out. The system creates different functional zones - one for gravel collection and another for organic material removal - enabling effective separation through localized functional differentiation.
Solution Approach 2:
The apparatus utilizes parameter changes, specifically density differences, to separate gravel from organic materials. By allowing materials to drop through the wheel assembly, the system exploits the heavier density of gravel versus lighter organic matter, causing gravel to be propelled forward while organics fall through. This parameter-based separation simplifies the overall device complexity by using natural physical properties rather than mechanical sorting mechanisms.
3Ease of operation
If existing grading devices are used, then the grading blade can spread material, but they cannot recapture gravel that has been pushed into the ditch
Solution Approach 1:
The apparatus applies universality by combining multiple functions into a single integrated system attached to the road grader. The wheel assembly not only recaptures gravel from the ditch but also performs sorting of organic materials and redirects materials back to the roadway. This multi-functional approach eliminates the need for separate haul-away trucks and multiple operations, making the overall system more efficient while maintaining ease of operation through a single attached device.
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
Effectively recaptures and redirects gravel back onto the roadway while allowing grass and weeds to fall back into the ditch, enhancing the efficiency of road grading operations by minimizing material loss and maintaining surface uniformity.
Implementation Method 1
Each wheel assembly includes a wheel having a plurality of tines and that is rotatable when actuated, the tines being spaced apart and radially arranged so as to kick up and urge gravel in a direction toward said mounting boom while allowing grass and weeds to pass through
Data Source
AI summary
A gravel recapturing and sifting apparatus for attachment to a vehicle on a roadway includes a framework that includes a mounting portion selectively coupled to a front of the vehicle and a mounting boom having a proximal end attached to the mounting portion and which extends rearwardly alongside the vehicle. The apparatus includes at least one wheel assembly coupled to an outer face of the mounting boom and being outwardly offset relative to the outer face, the at least one-wheel assembly including a wheel having a plurality of tines and that is rotatable when actuated. The tines are spaced apart and radially arranged so as to kick up and urge gravel in a direction toward the mounting boom while allowing grass and weeds to pass through in an opposite direction.