Needle-Free Injection Device With Spring-Pretensioned Piston
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Solution Overview
Problem
Existing needle injection devices for animals, especially in large-scale poultry farming, are inefficient and require needles, which can be painful and pose hygiene risks, necessitating the development of a needle-free injection system that ensures safe and reliable fluid administration.
Innovation Solution
A device featuring a piston-cylinder arrangement with a spring-pretensioned piston rod, a nozzle, and a releasable cylinder section, combined with a contact device that includes a shaped contact surface and a measuring system to detect animal contact, allowing for needle-free injection by triggering the injection mechanism when proper contact is established.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional syringe with needle is used for injection, then the injection can be administered manually, but the process is time-consuming and inefficient for large numbers of animals
Solution Approach 1:
The patent replaces the manual mechanical syringe operation with an automated needle-free injection system that uses fluid dynamics and pressure control to administer injections rapidly without manual manipulation, thereby increasing productivity and reducing time loss
Solution Approach 2:
The invention extracts and eliminates the needle component from the injection system, replacing it with a needle-free fluid delivery mechanism that achieves rapid injection through controlled fluid ejection, improving both speed and efficiency
2Reliability
If needles are used for injection, then fluid can be administered effectively, but hygiene risks and animal discomfort increase
Solution Approach 1:
The patent removes the needle from the injection system entirely, replacing it with a needle-free fluid ejection mechanism that delivers fluid through controlled pressure and aerodynamic principles, eliminating hygiene risks and animal discomfort associated with needle penetration
Solution Approach 2:
The invention introduces a fluid intermediary system that uses pressurized gas or elastic potential energy as a mediator to propel the injection fluid without direct needle contact, achieving reliable fluid administration while eliminating harmful factors
3Object-affected harmful factors
If high pressures are used in needle-free injection, then injection can be achieved without needles, but seal requirements increase
Solution Approach 1:
The patent divides the injection system into modular components with dedicated sealing zones, allowing each seal to be optimized independently for its specific pressure and functional requirements, thereby managing seal complexity while maintaining high-pressure needle-free operation
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
Enables safe, reliable, and efficient needle-free injection of fluids, such as vaccines or medicaments, into animals without direct contact with the needle, ensuring proper administration and minimizing animal discomfort and hygiene risks.
Implementation Method 1
a spring-pretensioned piston rod is guided by its front end in a cylinder
Implementation Method 2
a spring-pretensioned piston rod is guided by its front end in a cylinder for receiving the fluid to be injected
Implementation Method 3
The cylinder opens into a nozzle at the front dispensing end via a first nonreturn valve
Data Source
AI summary
A device for the needle-free injection of a fluid includes a first injector including a piston-cylinder arrangement in which a spring-pretensioned piston rod is guided by its front end in a cylinder for receiving the fluid to be injected. The cylinder opens into a nozzle at the front dispensing end via a first nonreturn valve. The cylinder with the first nonreturn valve and the nozzle form a releasable cylinder section in which a piston rod guide is arranged releasably at the end facing away from the nozzle. The piston rod guide includes a guide bushing to guide the piston rod and a fixing element connected to the guide bushing. In the installed state, the fixing element is fixed in the cylinder section. The fixing element has an engagement region for a tool, into which a tool can be inserted to release the fixing element from the cylinder section.