Self-Powered Granular Ejector Tool with Internal Pressure Regulation
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Solution Overview
Problem
Existing hand-held sandblasting devices are inefficient as they require remote compressed air sources and use a Venturi mechanism, which wastes pressure and limits the abrasive material's delivery strength and precision.
Innovation Solution
A self-contained, portable hand-held ejector tool with a refillable hopper and internal pressure regulation, allowing for precise control of abrasive particles and pressurized air flow, eliminating the need for external compressed air and enabling one-handed operation with a replaceable nozzle and adjustable material flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a remote compressed air source and Venturi mechanism are used, then the device can deliver abrasive particles, but the pressure is wasted and the delivery strength and precision are limited
Solution Approach 1:
The patent combines the compressed air source, abrasive storage hopper, mixing chamber, and delivery nozzle into a single integrated hand-held unit. This merging eliminates the need for separate remote air sources and Venturi mechanisms, allowing direct pressurization of the abrasive material for more efficient energy use and stronger, more precise delivery.
Solution Approach 2:
The invention extracts and eliminates the inefficient Venturi mechanism from the system. Instead of using a Venturi effect to mix and deliver abrasive particles, the patent uses a direct pressurization approach where compressed air is introduced into a mixing chamber containing the abrasive material, propelling it directly through the nozzle with minimal energy loss.
2Productivity
If a refillable hopper is attached to a pressurized propellant source with a Venturi chamber, then abrasive particles can be delivered, but the operational method is very inefficient
Solution Approach 1:
The hand-held unit is designed as a self-contained system where the user can refill the abrasive hopper and replace the compressed air cartridge independently without requiring external equipment or complex procedures. The integrated design allows the system to service itself through simple user actions, improving operational efficiency and reducing downtime.
Solution Approach 2:
The device is segmented into replaceable components: a refillable abrasive hopper, a compressed air cartridge, and a delivery nozzle. This segmentation allows each component to be optimized independently and replaced as needed, improving overall system efficiency and reducing waste from complete unit replacement.
3Measurement precision
If a hand-held ejector tool with internal pressure regulation is used, then precise control of abrasive particles and pressurized air flow is achieved, but the device complexity increases
Solution Approach 1:
The patent incorporates an internal pressure regulation mechanism that automatically adjusts the pressure of compressed air as it enters the mixing chamber. This parameter change ensures consistent, precise control of abrasive particle flow and air mixture ratio throughout operation, maintaining measurement precision without requiring complex external control systems.
Data Source
AI summary
A hand-held ejector tool for ejecting a pressurized stream of abrasive materials and a hopper assembly for use in the same is provided. The hand-held ejector tool includes a pressurized air source, a hopper assembly and a delivery conduit for ejecting a pressurized stream of abrasive material. The hopper assembly includes a containment area to store an abrasive material, an air conduit to receive pressurized air from the pressurized air source, a one-way valve to provide the pressurized air into an upper portion of the containment area, and a mixing device to mix the abrasive material and the pressurized air to create a pressurized stream of abrasive material. The delivery conduit may include a stylus to permit a controllable ejection the pressurized stream of abrasive material.