Bone Cement Mixing Group with Differential Hardness Gaskets
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Solution Overview
Problem
Existing liquid-powder mixers for bone cement face challenges in achieving a good seal, leading to air entry and bubble formation due to the gasket's inability to be excessively hard, and have excessive volume and size issues.
Innovation Solution
A mixing group with a first component delimiting a powder containment chamber and a second component housing a vial, featuring a piston and gaskets of varying hardness to ensure a tight seal and facilitate the introduction of liquid without air entry, while allowing for variable housing zone volumes to optimize mixing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gasket is used to allow manual movement of the second component, then ease of operation is improved, but sealing quality deteriorates
Solution Approach 1:
The patent applies parameter changes by using gaskets with different hardness values in different locations. The first gasket has a first hardness value optimized for sealing during manual movement, while the second gasket has a second hardness value optimized for maintaining seal during vacuum application. This differential hardness parameter allows the system to achieve both ease of operation and reliable sealing under different operational conditions.
2Adaptability or versatility
If the volume of the first component is increased to accommodate mixing chamber and other components, then device functionality is improved, but device size increases
Solution Approach 1:
The patent applies the nesting principle by placing the second component (vial housing) inside the first component (mixing chamber housing). The vial is inserted through the bottom wall of the first component, and the second component is received within the first component. This nested arrangement allows both components to coexist in a compact configuration, accommodating the mixing chamber functionality while minimizing the overall volume of the first component.
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 ensures a high-quality bone cement by preventing air entry and reducing bubble formation, while minimizing the mixer's size and improving the efficiency of the mixing process.
Implementation Method 1
a gasket (9, 10) arranged between the first and the second component, so as to ensure the seal thereof
Implementation Method 2
facilitate the introduction of liquid without air entry
Data Source
AI summary
Mixing group for mixing two compounds to obtain a mixture, such as bone cement or an acrylic resin or a hydraulic cement, including:a first component having a substantially tubular body and delimiting a first housing zone of a first compound to be mixed, the first component having a first end as well as a second end,a second component with substantially tubular body and delimiting a second housing zone, the second component having a third end as well as a fourth end, the second component being set to contain a second compound to be mixed or a vial for containing a second compound to be mixed,the first housing zone being in fluid communication with the second housing zone, so as to allow the passage of the second compound from the second housing zone to the first housing zone.