Handheld Ground Sprayer Motor-Driven Pump
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Solution Overview
Problem
Existing handheld ground sprayers rely on aerosol cans or disposable bags of marking fluid, which are hazardous and costly to dispose of, and require frequent refilling, leading to inefficiencies in marking operations.
Innovation Solution
A handheld ground sprayer design featuring a front portion with a pump and nozzle, and a rear portion with a handle and motor, allowing for the use of refillable fluid reservoirs and eliminating the need for propellants by using a motor-driven pump to atomize the marking fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If aerosol cans are used to apply marking fluid, then the marking operation can be performed, but the aerosol products are considered hazardous waste that must be specially treated, increasing disposal costs
Solution Approach 1:
The patent extracts and eliminates the propellant component from the aerosol can system, using only the marking fluid in a refillable container. This removes the hazardous waste issue associated with propellants while maintaining the spray application capability through a motor-driven pump system.
Solution Approach 2:
The patent implements a refillable fluid reservoir system that can be recovered and refilled with marking fluid, eliminating the need to discard entire aerosol cans after use. This reduces waste disposal costs and environmental impact.
2Ease of operation
If bags of marking fluid are used in spray guns, then the marking fluid can be applied, but the bags must be disposed of after use and a new bag must be loaded to continue marking, leading to operational inefficiencies
Solution Approach 1:
The patent creates a universal, refillable fluid reservoir system that can accommodate different volumes and types of marking fluid, replacing the single-use bags. This multi-functional reservoir can be refilled and reused, eliminating the need to stop and replace bags during marking operations.
Solution Approach 2:
The patent implements a continuous supply system with a refillable reservoir that maintains marking operations without interruption. The motor-driven pump ensures continuous fluid delivery, and the reservoir can be refilled during operation without requiring complete replacement of the fluid container.
3Ease of operation
If aerosol cans are used, then marking fluid can be sprayed, but propellants are required which increase environmental impact
Solution Approach 1:
The patent removes the propellant component entirely from the system, using only environmentally benign marking fluid. The motor-driven pump replaces the propellant's function of pressurizing and propelling the fluid, eliminating harmful emissions and environmental contamination.
Solution Approach 2:
The patent replaces the chemical propellant system with a mechanical pump system driven by an electric motor. This substitution eliminates the need for volatile organic compounds and propellants, significantly reducing environmental impact while maintaining effective spray application.
4Quantity of substance
If disposable bags are used in spray guns, then marking fluid can be stored and sprayed, but the bags require mechanical or pneumatic crushing to build spray pressure, adding device complexity
Solution Approach 1:
The patent replaces the complex mechanical or pneumatic crushing mechanisms with a simple motor-driven pump system. The pump directly pressurizes the marking fluid in the refillable reservoir, eliminating the need for bag crushing mechanisms and associated complexity.
Solution Approach 2:
The patent extracts and eliminates the disposable bag crushing mechanism entirely, using a refillable reservoir that works directly with the pump system. This simplifies the overall device architecture by removing unnecessary components.
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 design provides an efficient, airless spray of marking fluid, reduces waste, and allows for easy switching between different marking fluids, minimizing environmental impact and operational downtime.
Implementation Method 1
a pump fluidly connected to the fluid reservoir and configured to draw the marking fluid from the fluid reservoir
Implementation Method 2
a motor connected to the pump and configured to power the pump
Implementation Method 3
a nozzle configured to spray a marking fluid
Data Source
AI summary
A ground sprayer includes a front portion and a rear portion. A marking fluid is stored in a fluid reservoir removably mounted in the front portion. A pump disposed in the front portion draws the marking fluid from the fluid reservoir through a manifold, and the pump drives the marking fluid out of a nozzle. An actuator is disposed in the rear portion and can activate the pump based on a command from the user. The rear portion includes a handle such that the user can fully support and operate the ground sprayer with a single hand.