Medical Lifting Column Slide Fixation With Cured Casting Compound
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Solution Overview
Problem
Lifting columns for medical facilities, such as operating tables, face challenges in assembly complexity and the need for frequent readjustment of sliding elements, which are difficult to fix precisely due to uneven inner surfaces and wear, leading to instability and reduced durability.
Innovation Solution
A lifting column design featuring column elements with a sliding element fixed to the inner surface of one element, using a pressure-stable, low-shrinkage casting compound to secure the sliding surface, eliminating the need for complex assembly and readjustment, and incorporating a layered sliding element with a composite material for optimal sliding and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sliding elements are fixed to inner surfaces of column elements using conventional methods, then assembly is complex and readjustment is frequently required, but the patent simplifies assembly and eliminates readjustment needs
Solution Approach 1:
A casting compound is introduced as an intermediary material between the sliding element and the inner surface of the column element. This compound is injected into the space and cures to form a durable bond, replacing complex mechanical fixation methods. The casting compound serves as a mediator that simultaneously achieves easy assembly (by simple injection) and high reliability (through strong adhesion and compensation of surface unevenness).
Solution Approach 2:
The patent changes the physical state and properties of the bonding medium from mechanical fasteners to a liquid casting compound that is injected and then cures. This parameter change from solid mechanical connection to liquid-to-solid chemical bonding enables both simplified assembly (liquid injection) and enhanced reliability (cured compound forms strong adhesive bond that compensates for surface irregularities).
2Device complexity
If conventional fixing methods are used for sliding elements, then assembly requires complex procedures, but the patent enables easy assembly through simplified fixation
Solution Approach 1:
The patent replaces mechanical fixation systems (screws, clips, or other mechanical fasteners) with a chemical bonding system using casting compound. This substitution eliminates the need for complex mechanical assembly procedures while providing reliable fixation. The casting compound is simply injected into the space between the sliding element and column element, curing to form a strong bond without requiring precision mechanical operations.
3Reliability
If sliding elements are designed to be adjustable, then they can accommodate wear and surface unevenness, but they require frequent readjustment and complex intervention
Solution Approach 1:
The casting compound performs a preliminary action by compensating for surface unevenness and providing stress distribution during the initial bonding process. By pre-adapting to the actual surface conditions when the sliding element is first fixed, the compound eliminates the need for subsequent readjustments that would otherwise be required to accommodate wear and surface irregularities throughout the service life of the lifting column.
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 simplifies assembly, ensures precise and durable sliding action, and eliminates the need for frequent readjustment, enhancing the mechanical stability and longevity of the lifting column by evenly distributing forces and compensating for surface unevenness.
Implementation Method 1
A potting compound is cured in a space between the sliding surface of the sliding member and the inner surface of the first pillar member
Data Source
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AI summary
The invention relates to a lifting column (10) for a medical device, with at least two column elements (12, 14) which are movable relative to each other in their mutual longitudinal direction, and with at least one slide element (40) which is secured on an inner surface (54a to 54d) of a first of the two column elements (12) and which has a slide surface (50) which is mounted sliding on an outer surface (18a to 18d), of a second of the two column elements (14), directed towards the inner surface (54a to 54d) of the first column element (12). A sealing compound (52) is here cured in a space between the slide surface (50) of the slide element (40) and the inner surface (54a to 54d) of the first column element (12).