Hand Truck Emulsion Tack Coat Applicator for Uniform Small Area Bonding
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Solution Overview
Problem
Existing methods for applying tack coats on small areas are inefficient and prone to clogging, making it difficult to achieve uniform bonding between new and existing asphalt layers, leading to potential potholes and safety issues.
Innovation Solution
A hand truck-type applicator with a bucket and valve/nozzle assembly that allows for controlled dispensing of emulsion tack coat material, enabling precise application on small areas with adjustable flow rates between 0.02 and 0.30 gallons/yd².
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand tools or hand spray devices are used to apply tack coat on small areas, then the applicator can be maneuvered easily, but the application process becomes cumbersome and messy with frequent clogging and jamming
Solution Approach 1:
The applicator is divided into separate functional modules: a hand truck frame for support and maneuverability, a removable bucket for storage, and a separate spray mechanism with nozzle. This segmentation allows each component to be optimized independently - the hand truck provides stable maneuverability while the spray mechanism can be designed to prevent clogging without compromising the ease of operation.
Solution Approach 2:
The patent introduces an intermediary chamber or hopper between the bucket and the nozzle that acts as a buffer. This intermediary space allows the tack coat material to flow smoothly from storage to application point, reducing direct contact between the material and narrow passages that would cause clogging, while maintaining controlled spray delivery.
2Reliability
If traditional large spray trucks are used for small area applications, then the spray system is reliable and efficient, but the equipment is oversized and not suitable for small jobs
Solution Approach 1:
The applicator segments the large truck spray system into a compact hand-operated version. The hand truck frame provides a scaled-down support structure, the bucket offers appropriate storage capacity for small jobs, and the spray mechanism maintains reliability through careful nozzle design and material flow control, making it adaptable to small areas while preserving spray system reliability.
Solution Approach 2:
The applicator incorporates dynamic elements including a movable bucket that can be positioned at different heights and angles, and a adjustable spray nozzle that can be directed to various locations. This dynamic positioning capability allows the same device to adapt to different small area configurations and application requirements, maintaining spray reliability across various scenarios.
3Ease of manufacture
If manual pouring with cups or containers is used, then the applicator is simple and easy to obtain, but the application process is extremely cumbersome and time-consuming
Solution Approach 1:
The patent merges multiple functions into a single integrated device: the hand truck frame provides structural support and maneuverability, the bucket combines storage with dispensing capability, and the spray mechanism integrates material delivery with application. This consolidation eliminates the need for separate cups, containers, and pouring actions, maintaining simplicity while dramatically improving application speed and efficiency.
Solution Approach 2:
The patent replaces manual mechanical pouring actions with a spray-based application system. Instead of manually transferring material with cups or containers, the user operates a spray mechanism that atomizes and deposits the tack coat material, reducing physical effort and increasing application speed while maintaining ease of operation through simple hand controls.
4Productivity
If the nozzle spray rate is increased to cover larger surfaces, then the productivity increases, but the application precision for small areas decreases
Solution Approach 1:
The applicator incorporates adjustable spray rate mechanisms that allow the user to dynamically modify the nozzle output based on the specific application requirements. For small areas, the spray rate can be reduced to achieve precise, uniform application, while for larger surfaces, the rate can be increased to maintain productivity. This dynamic adjustability resolves the contradiction between coverage rate and application precision.
Solution Approach 2:
The patent enables parameter changes in the spray delivery system, specifically allowing adjustment of flow rate, spray pattern, and nozzle angle. These parameter modifications permit optimization of the application process for different surface sizes and conditions, maintaining both high productivity for large areas and high precision for small areas through controlled parameter variation.
Data Source
AI summary
Embodiments of the present invention are generally related to an emulsion tack coat applicator and methods of utilizing the same. More specifically, embodiments of the present invention relate to hand truck-type applicator for emulsion tack coat applications and methods of using the same. In one embodiment of the present invention, a tack coat applicator comprising a hand truck comprising a substantially frame having a handle section at a first end and a set of wheels separated by an axle at a second end, and a platform extending substantially perpendicular to the rigid proximate the wheels; and bucket having a voluminous storage portion for storing tack coat material, removeably positioned on the platform, the bucket comprising an output for dispensing the tack coat material.