Patient Moving Device With Eccentric Pivots For Comfortable Transfer

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Solution Overview

Problem

Existing patient moving devices are complex, expensive, and impractical for home use due to their large size and weight, often causing discomfort and straining caregivers during patient transfer, especially for individuals with limited mobility.

Innovation Solution

A patient moving device with a terrain-engaging mobile chassis, primary and secondary pivots, patient-support, and knee-rests, utilizing a reorientation mechanism that allows for efficient and comfortable transfer by distributing the lifting force over a longer distance, maintaining a constant hip angle and minimizing discomfort through controlled movements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing patient moving devices are used, then patient transfer function is achieved, but device complexity and cost increase

Engineering Contradiction:

Improvepatient transfer functionVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The device is divided into distinct functional modules: a mobile base unit with drive mechanism, a separate patient support unit with positioning mechanism, and connection interfaces. This segmentation allows each module to be optimized independently, reducing overall complexity while maintaining transfer functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mobile base unit serves multiple functions: it provides mobility for transporting the patient, houses the drive mechanism for position adjustment, and includes positioning mechanisms for alignment. This multi-functionality eliminates the need for separate devices, reducing complexity while achieving reliable patient transfer.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If existing patient moving devices are used, then patient transfer is enabled, but device size and weight increase making it impractical for home use

Engineering Contradiction:

Improvepatient transfer capabilityVSAvoiddevice weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The device is divided into a mobile base unit and a patient support unit that can be connected or separated. This segmentation reduces the weight of each individual component, making the device more manageable and suitable for home environments while maintaining full transfer capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The device incorporates movable and adjustable components, including the mobile base with wheels for easy relocation and adjustable positioning mechanisms. This dynamic design allows the device to be moved and reconfigured as needed, reducing the perceived weight and improving practicality for home use.

Inventive Principle:

Principle #15Dynamics

3Reliability

If existing patient moving devices are used, then patient lifting is achieved, but caregiver physical strain increases

Engineering Contradiction:

Improvepatient lifting functionVSAvoidcaregiver physical strain

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The device incorporates self-positioning and self-alignment mechanisms that automatically adjust the patient support unit relative to the mobile base. This reduces the physical effort required by the caregiver, as the device performs much of the positioning work automatically while maintaining reliable patient lifting function.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The device replaces manual mechanical lifting with an automated drive mechanism that provides controlled movement. This substitution reduces caregiver physical strain while ensuring reliable and safe patient lifting through powered assistance.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Reliability

If existing patient moving devices are used, then patient transfer is enabled, but patient comfort decreases due to motion and ergonomics

Engineering Contradiction:

Improvepatient transfer functionVSAvoidpatient discomfort

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The device incorporates dynamic positioning mechanisms that enable smooth, controlled movements during patient transfer. The adjustable patient support unit can be positioned at optimal angles and heights, reducing discomfort caused by awkward positioning while maintaining reliable transfer function.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The device allows adjustment of multiple parameters including patient support angle, height, and position relative to the mobile base. These parameter changes enable optimization of patient comfort during transfer while maintaining the reliability of the patient transfer function.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12150907B2Patient moving device

Publication Date: 2024.11.26 HAPAI TRANSFER SYST LTD

AI summary

A patient-moving device (1) for patient handling. The device (1) includes a chassis (3), patient-support (5), and knee-rest (37). The device (1) includes a primary pivot (17) and a secondary pivot (11) located eccentrically from the primary pivot (17). A reorientation mechanism (4) is coupled to the patient-support (5), primary pivot (17) and chassis (3). During operation to reorientate the reorientation mechanism (4) during patient handling the patient support (5) is movable relative to the chassis (3) by rotation of the primary pivot (17) and/or secondary pivot (11) and the knee rest (37) is movable relative to at least a portion of the chassis (3).