Hose Bending Valve Layout for Steep Needleless Injection Pressure
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Solution Overview
Problem
Existing fluid application systems struggle to efficiently create a sharp fluid jet with a steep pressure increase for opening injection channels in biological tissue while minimizing liquid deposition and requiring low operational effort.
Innovation Solution
A system comprising a first fluid hose connected to a hose bending device, where the hose itself acts as a valve, and a holder forms a loop that is inserted into the device to control fluid flow, allowing high-pressure fluid discharge with steep pressure increase flanks, separating sterilizable and non-sterilizable components for easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a flexible hose is used inside a pressure container as a pinch valve, then the blocking force required is low, but the pressure increase flank becomes less steep
Solution Approach 1:
The system is divided into two functional parts: the flexible hose provides the blocking function with low force, while the rigid pressure container provides the pressure transmission function. This segmentation allows each component to optimize its specific function without compromise.
Solution Approach 2:
The rigid pressure container acts as an intermediary between the flexible hose and the fluid system. It transmits pressure efficiently while the flexible hose merely controls flow blocking, decoupling the force requirement from the pressure increase rate requirement.
2Reliability
If valves are configured as single-use components or sterilizable, then reliability is improved, but device complexity and replacement effort increase
Solution Approach 1:
The flexible hose is designed as a disposable component that can be easily replaced, while the rigid pressure container is a durable component that remains in the system. This allows the disposable part to be sterilized or discarded, ensuring reliability without making the entire system complex to maintain.
Solution Approach 2:
By segmenting the valve into a disposable flexible hose part and a permanent pressure container part, the system achieves sterilization capability through the disposable component while keeping the overall device complexity low through the reusable component.
3Reliability
If multiple bending sites are arranged one after another to form valves, then valve functionality is achieved, but device complexity increases
Solution Approach 1:
Instead of creating multiple bending sites along the hose to achieve valve functionality, the invention inverts the approach by using a single bending site combined with a rigid pressure container to achieve the same valve effect with reduced complexity.
Solution Approach 2:
The single bending site in combination with the rigid pressure container serves multiple functions: it acts as a valve, provides pressure transmission, and enables easy sterilization, replacing the need for multiple specialized bending sites.
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 system achieves efficient high-pressure fluid discharge with steep pressure increase, ensuring minimal liquid deposition and low operational effort, suitable for single-use components with minimal sterilization requirements.
Implementation Method 1
a spring means, in particular a compression spring, is arranged between the two legs and acts upon one of them
Implementation Method 2
a movable element is provided that is configured to move the two legs toward one another
Implementation Method 3
The hose is thereby bent at the loop head in such a way that the fluid channel is blocked
Data Source
AI summary
For producing a high pressure impulse, a hose bending valve is provided that comprises a loop (12) provided in a supply hose of an instrument (2) and a hose bending device (8) provided as multiple-use component. Such a valve is very simply constructed and allows the creation of steep pressure increase flanks with very high pressures up to 100 bar, as are needed for a needleless injection. The sterilization effort is minimal. Also, the material effort is minimal, if single-use components are used.