Patient Support Table Mobility Attachment With Mechanical Lift

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Conventional patient support apparatuses face challenges in accurately measuring changes in weight distribution, are cumbersome to maneuver, and can be unstable and expensive to manufacture, with some designs featuring permanent handles that increase length and hydraulic systems prone to leakage.

Innovation Solution

A modular system with a platform, support column, and base that includes drive wheels and load sensing/floor lift mechanisms, allowing for precise movement and positioning of patients during medical procedures, featuring a drive assist user interface module and linkage systems for efficient lifting and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If permanent handles are mounted in the head or foot section to assist maneuvering, then ease of operation is improved, but the overall length of the table increases and device complexity increases

Engineering Contradiction:
ImprovemaneuverabilityVSAvoidoverall length
Core Design Contradiction:
Ease of operationVSLength of moving object

Solution Approach 1:

The patent removes permanent handles from the table structure and replaces them with removable attachments that can be added only when maneuvering is needed. This extracts the handling function from the permanent structure, reducing the table's overall length while maintaining ease of operation when required.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements dynamic maneuvering aids that can be attached or removed based on operational needs. Instead of fixed permanent handles, the system uses removable attachments with drive wheels and user interface modules that provide assistance only when needed, allowing the table to transition between compact and maneuverable states.

Inventive Principle:
Principle #15Dynamics

2Force

If hydraulic columns with telescoping block sections are used to raise and lower the patient support platform, then lifting capability is improved, but manufacturing cost increases and reliability decreases due to oil leakage

Engineering Contradiction:
Improvelifting capabilityVSAvoidleakage risk
Core Design Contradiction:
ForceVSReliability

Solution Approach 1:

The patent replaces hydraulic lifting systems with a mechanical linkage system consisting of 4-bar linkages and floor lift mechanisms. This substitution eliminates hydraulic oil and associated leakage risks while maintaining the required lifting capability through pure mechanical advantage from the linkage geometry and floor-based support.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts the hydraulic fluid system from the lifting mechanism, removing the source of leakage problems. The lifting function is maintained through a dry mechanical system using linkages and floor-based support structures that do not rely on contained fluids.

Inventive Principle:
Principle #2Taking out (Extraction)

3Shape

If telescoping block sections are used in the hydraulic column to move downward close to the ground, then accessibility is improved, but manufacturing cost increases

Engineering Contradiction:
Improvevertical rangeVSAvoidmanufacturing cost
Core Design Contradiction:
ShapeVSEase of manufacture

Solution Approach 1:

The patent replaces complex telescoping hydraulic columns with a simpler mechanical linkage system that achieves the same vertical range adjustment. The 4-bar linkages and floor lift mechanisms provide the necessary vertical motion without requiring expensive telescoping sections and hydraulic components.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent segments the lifting function into separate mechanical components (linkages, floor lift mechanisms) rather than using a single integrated telescoping hydraulic column. This segmentation simplifies manufacturing while achieving the required vertical adjustment range.

Inventive Principle:
Principle #1Segmentation

4Measurement precision

If weight sensors are integrated into the patient support to monitor weight distribution, then measurement precision is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:
Improveweight distribution measurementVSAvoidsystem complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent integrates weight sensing capability into the existing floor lift mechanisms and base structure, which already support and position the table. These components serve dual functions: providing mechanical support/lifting and sensing weight distribution, thereby improving measurement precision without significantly increasing overall system complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS11896533B2System, apparatus and method for supporting and/or positioning a patient before, during, or after a medical procedure
Publication Date: 2024.02.13 MIZUHO OSI
  • US11896533B2 patent drawing
  • US11896533B2 patent drawing
  • US11896533B2 patent drawing

AI summary

A system for supporting or positioning a patient before, during, or after a medical procedure can include a platform configured to support at least a portion of a patient. A support column can be positioned beneath the platform. A base can be positioned beneath the support column and configured to support the support column. The base can include at least one drive wheel configured to contact a ground surface and move the platform with respect to the ground surface. A drive assist user interface module can be operatively connected to the at least one drive wheel. The drive assist user interface module can be configured to permit an operator of the system to selectively control movement of the at least one drive wheel. The drive assist user interface module can be part of or be attached to an attachment that includes a plate having a top surface. In one configuration, the top surface of the plate can be configured to extend parallel with a top surface of the platform when the attachment is attached to the platform.