Gyroscope-Assisted Litter Basket Stabilization in Helicopter Rescue

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Solution Overview

Problem

Patient litter baskets in helicopter rescues can uncontrollably spin due to ambient wind and helicopter rotor downdraft, causing discomfort and danger to patients and rescuers.

Innovation Solution

A patient litter basket spin control assembly using gyroscopes, motion sensors, and a control system to generate counter torque, stabilizing the basket by activating gyroscopes to counteract angular acceleration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a patient litter basket is lowered from a helicopter using a hoist, then the patient can be rescued and transported, but the litter basket may spin uncontrollably due to ambient wind and helicopter rotor downdraft

Engineering Contradiction:

Improverescue operation efficiencyVSAvoidlitter basket stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The patent applies counterweight principles by using gyroscopes with flywheels that generate counter-torque to offset the harmful spin forces. The gyroscopes are positioned and oriented to provide opposing torque that counteracts the rotational acceleration caused by wind and rotor downdraft, thereby stabilizing the litter basket during the rescue operation.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The patent converts the harmful effect of spin into a beneficial stabilization mechanism by using the gyroscope effect. The spinning flywheels within the gyroscopes generate precessional forces that naturally counteract external rotational forces, transforming the potential harm of uncontrolled spinning into a useful stabilization force that maintains litter basket orientation.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Object-affected harmful factors

If the litter basket spins at high speed, then it may be caused by strong winds or rotor downdraft, but this causes discomfort and danger to the patient

Engineering Contradiction:

Improvewind and rotor downdraftVSAvoidpatient discomfort and danger

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent implements feedback control by using motion sensors to continuously monitor the litter basket's orientation and spin rate. The sensor data is fed to a control system that adjusts the gyroscope activation and torque output in real-time, creating a closed-loop system that responds to and compensates for changing wind conditions and rotor downdraft forces.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent introduces gyroscopes as intermediary devices between the external harmful forces (wind and rotor downdraft) and the patient. The gyroscopes absorb and dissipate the rotational energy through their flywheel mechanisms, acting as a buffer that prevents direct transmission of harmful spin forces to the patient and litter basket.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Stability of the object's composition

If gyroscopes are added to control the litter basket spin, then stability is improved, but the device complexity increases

Engineering Contradiction:

Improvelitter basket stabilityVSAvoidspin control assembly complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent segments the stabilization function into multiple independent gyroscope units, each with its own flywheel and motor. This modular approach allows the system to achieve stable control through the combined effect of multiple simple components rather than a single complex mechanism, making the overall system more manageable and easier to implement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements self-service stabilization where the gyroscopes automatically detect and counteract spin forces through their inherent physical properties. The flywheels spin in a direction that naturally generates counter-torque against external rotational forces, eliminating the need for complex active control mechanisms and reducing overall system complexity.

Inventive Principle:

Principle #25Self-service

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 system effectively stabilizes the litter basket, preventing excessive spinning and ensuring patient safety during helicopter rescues by maintaining stability and control.

Implementation Method 1

a first gyroscope configured to generate a counter torque in a rotational direction to slow the angular acceleration of the patient litter basket

Methodology Applied

Scientific EffectGyroscope: Gyroscope

Implementation Method 2

The first gyroscope is configured to generate a counter torque in a rotational direction to slow the angular acceleration of the patient litter basket

Methodology Applied

Scientific EffectAngular momentum: Angular Momentum

Data Source

PatentUS12357517B2Gyroscope assisted helicopter rescue lift systems and methods

Publication Date: 2025.07.15 HORNET ACQUISITIONCO LLC

AI summary

A patient litter basket spin control assembly includes a first gyroscope and a motion sensor for sensing an angular acceleration of a patient litter basket. The first gyroscope generates a counter torque to the litter basket to slow the angular acceleration of the litter basket to provide stabilization. The first gyroscope and a second gyroscope may be configured as a pair and located at opposite ends of the litter basket.