Manual Sprayer Valve Prevents Liquid Leakage
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Solution Overview
Problem
Existing manual and localized spraying devices face issues with venting, as the orifice on the pommel can be blocked by the user's hand and risk liquid escape when the device is positioned horizontally or upside down, leading to improper functioning and potential spills.
Innovation Solution
A manual and localized spray device with a tubular reservoir, a gripping knob, and a spray assembly, featuring a valve that is operable by gripping the pommel and automatically vents when the user grasps the knob, ensuring air circulation around the periphery and elastic means to return the valve to a closed position, preventing liquid escape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an orifice is formed in the pommel for venting the reservoir, then air venting is enabled to prevent depression formation, but the orifice risks being blocked by the user's hand and liquid escape occurs when the device is positioned horizontally or upside down
Solution Approach 1:
The valve is designed to be operable solely by gripping of the pommel by a user, moving between closed and open positions dynamically based on user action. This dynamic mechanism ensures the valve opens for venting when needed while automatically closing to prevent liquid leakage, resolving the contradiction between reliable venting and preventing harmful effects.
Solution Approach 2:
The elastic means automatically return the valve to its closed position after venting, making the system self-regulating. The valve opens when the user grips the pommel for venting, then self-closes without user intervention, preventing liquid escape while maintaining venting functionality. This self-service mechanism eliminates the need for manual control while ensuring reliable operation.
2Device complexity
If a fixed orifice is used for venting, then the structure is simple, but the air vent can be blocked by the user's hand during operation
Solution Approach 1:
The valve mechanism transforms the static orifice into a dynamic opening that responds to user gripping action. When the user grips the pommel, the valve opens to allow air circulation; when released, it closes automatically. This dynamic behavior prevents hand blocking while maintaining operational simplicity through automatic actuation.
Solution Approach 2:
The valve acts as an intermediary between the user's gripping action and the air venting function. Instead of a direct fixed orifice that can be blocked, the valve mediates the airflow based on user input, allowing venting only when the user intends to spray by gripping the pommel, thus preventing accidental blocking.
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 device ensures proper functioning by automatically venting the tank during spraying and prevents liquid from escaping, even when the device is overturned, enhancing usability and safety.
Implementation Method 1
elastic means being provided for return said valve to its closed position
Implementation Method 2
a piston integral with said tank and movable inside said chamber, this piston being adapted to expel the phytosanitary liquid located in said chamber towards said spraying means
Data Source
Figure 1~5
Figure 6~8
AI summary
This apparatus for manual, localized pulverization comprises a tubular reservoir (1) suitable for receiving a phytosanitary liquid, a gripping knob (3) mounted on one end of this reservoir, and a set for pulverization mounted in fluid communication with the other end of this reservoir, and comprises a pulverization means, a means for supporting said set for pulverization on the ground, and a means for venting from said reservoir. This apparatus is remarkable in that said venting means comprises a valve (13) that can be activated whereby the user merely grasps said knob (3) and moves between a closing position, obstructing communication by said reservoir (1) with the exterior, and an opening position, allowing such communication, and an elastic means (17) that is set up to bring said valve (13) back to its closing position.