Lockable Syringe with Desmodromic Threaded Segment
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Solution Overview
Problem
Current lockable syringes for balloon catheters are difficult to use and assemble, and often include too many parts, making them cumbersome for precise pressure control during medical procedures.
Innovation Solution
A lockable syringe with a simplified design featuring a unitary syringe body, a plunger with a selectively deployable and retractable threaded segment, and an operator-actuated desmodromic mechanism for rapid and controlled plunger movement, allowing for both macro and micro pressure adjustments through axial and rotational movements, along with a transparent body for fluid visibility and a pressure gauge housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional lockable syringes are designed with multiple components for precise pressure control, then pressure control precision is improved, but device complexity and ease of assembly deteriorate
Solution Approach 1:
The patent combines multiple components into a unitary syringe body structure where the barrel, handle, and locking mechanism are integrated. The plunger assembly includes integrated components (piston, threaded segment, cam mechanism) that work together as a unified system, reducing the total number of parts while maintaining precise pressure control through the threaded engagement and cam-actuated locking mechanism.
2Measurement precision
If traditional lockable syringes include multiple components for precise pressure control, then pressure control precision is improved, but ease of assembly deteriorates
Solution Approach 1:
The syringe is divided into two main separable assemblies: the unitary syringe body and the plunger assembly. The plunger assembly can be independently manufactured and then assembled into the syringe body through a simplified process where the piston is inserted into the barrel and the handle is attached, significantly reducing assembly complexity compared to traditional multi-component designs.
3Speed
If lockable syringe provides rapid plunger movement for macro adjustments, then speed of pressure adjustment is improved, but control precision for micro adjustments deteriorates
Solution Approach 1:
The syringe provides dynamic operation with two distinct modes: unlocked mode for rapid macro pressure adjustments where the plunger moves freely, and locked mode for precise micro adjustments where the threaded segment engages with the barrel threads. The cam mechanism dynamically transitions between these modes, allowing the operator to switch between speed and precision control as needed.
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 syringe provides easy assembly, reduced complexity, and precise pressure control with fewer parts, enhancing user experience and operational efficiency during medical procedures by allowing rapid and controlled pressure adjustments.
Implementation Method 1
a threaded segment, and an operator actuated desmodromic arrangement to controllably reciprocate the threaded segment in a positive manner in order to allow either rapid manual or thread controlled plunger and piston movement
Implementation Method 2
an operator actuated desmodromic arrangement to controllably reciprocate the threaded segment in a positive manner
Data Source
Figure 1~3
Figure 2
Figure 4~5
AI summary
A lockable syringe having an actuating mechanism for rapidly and selectively placing a movable thread bearing plunger member and stationary internally threaded cylinder into or out of threaded engagement, particularly for using the syringe to pressurize therapeutic medical balloon catheters, or the like. The mechanism includes a plunger having both a piston at its end to engage a barrel portion of a unitary syringe body, selectively deployable and retractable threaded segment, and an internally threaded cylindrical structure disposed within a unitary syringe body having a barrel. The plunger is with the threaded cylinder by means of a threaded segment, and an operator actuated desmodromic arrangement to controllably reciprocate the threaded segment in a positive manner in order to allow either rapid manual or thread controlled plunger and piston movement within the syringe's barrel for purposes of displacing or pressurizing working fluid contained therein.