Exchangeable Fluid Administration Front Assembly
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Solution Overview
Problem
Existing devices for administering fluids, such as self-filling syringes, face challenges in achieving lightweight design, long service life, and low maintenance costs while minimizing wear and contamination risks.
Innovation Solution
A device featuring a cylinder with a piston and piston rod, a nonreturn valve, and a tensioning device that allows for exchangeable front assemblies, enabling easy replacement of worn parts and reducing contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the front assembly is made non-separable to simplify structure, then device complexity is reduced, but wear and contamination cannot be addressed and service life is limited
Solution Approach 1:
The device is divided into a separable front assembly (cylinder, nonreturn valve, nozzle) and a receiving block. The front assembly can be detached and replaced when worn, while the receiving block remains. This segmentation allows the wear-prone components to be independently replaced, extending the overall device service life without requiring complete replacement.
Solution Approach 2:
The front assembly is designed as a disposable or replaceable component that can be discarded after wear or contamination. By discarding only the front assembly rather than the entire device, the patent extends service life cost-effectively while maintaining structural simplicity in the permanent receiving block.
2Ease of repair
If the front assembly is made separable to enable part replacement, then service life and ease of repair are improved, but device complexity increases
Solution Approach 1:
The device is segmented into a front assembly and receiving block with a defined separation interface. This segmentation enables easy replacement of the front assembly by simply detaching it from the receiving block, significantly improving ease of repair while adding minimal structural complexity through the separation mechanism.
Solution Approach 2:
The front assembly is extracted as a separate, removable component from the receiving block. This extraction allows the front assembly to be independently maintained or replaced without affecting the receiving block, improving repairability while keeping the overall structure relatively simple through modular design.
3Reliability
If the front assembly is made exchangeable to reduce contamination, then reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The device is segmented into a front assembly that contacts the animal and a receiving block that remains stationary. By making the front assembly exchangeable, contamination is prevented through replacement rather than complex sterilization systems, improving reliability while keeping manufacturing relatively simple through modular production.
Solution Approach 2:
The front assembly is designed as a relatively simple, exchangeable component that can be replaced rather than sterilized. This approach uses simpler manufacturing for the front assembly compared to creating a permanently sealed, sterilizable unit, reducing manufacturing complexity and cost while improving contamination prevention through replacement.
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 solution significantly increases the durability of the device by allowing for easy replacement of worn parts, reduces maintenance costs, and minimizes contamination risks, while maintaining efficient fluid administration.
Implementation Method 1
a nonreturn valve (or intake valve) closing the open dispensing end
Implementation Method 2
a tensioning device which is connected to the piston rod and is arranged in the receiving block. The tensioning device can move the piston rod in a tensioning operation
Implementation Method 3
the piston moves counter to the first direction as far as its front end position because of the applied pretension and, in the process, the fluid in the cylinder is dispensed
Data Source
AI summary
A device for administering a fluid is provided, witha cylinder (16, 116) which has an open dispensing end (17),a piston (36) which is displaceable between a front end position and a rear end position in the cylinder (16, 116) and is connected to a piston rod (35, 135) that protrudes along a first direction beyond a rear end of the cylinder (16, 116) opposite the open dispensing end (17) and is guided in a receiving block (10),a nonreturn valve (18) closing the open dispensing end (17),and a tensioning device (S) which is connected to the piston rod (35, 135) and is arranged in the receiving block (10),wherein the tensioning device (S), when the piston (36) is in the front end position, can move the piston rod (35, 135) in a tensioning operation along the first direction until the piston (36) is in the rear end position in order thereby to fill the cylinder (16, 116) with the fluid to be administered and in order to pretension the piston rod (35, 135) toward the open dispensing end (17), andwherein the tensioning device (S), when the piston (36) is in the rear end position, can release the piston rod (35, 135) in a dispensing operation, and therefore the piston (36) moves counter to the first direction as far as its front end position because of the pretension and, in a process, the fluid in the cylinder (16, 116) is dispensed via the nonreturn valve (18) for administering,wherein the cylinder (16, 116) together with the nonreturn valve (18) is in a form of an exchangeable front assembly (13, 14) which is releasably connected to the receiving block (10).