Gyroscope-Assisted Litter Basket Spin Control for 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.

Innovation Solution

A patient litter basket spin control assembly using gyroscopes to generate counter torque, stabilized by a motion sensor and a controller, which activates gyroscopes to counteract angular acceleration and maintain stability.

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 spinning forces. The gyroscopes are positioned to create opposing moments that balance the aerodynamic forces causing the litter basket to spin, thereby maintaining stability during the rescue operation.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The patent changes the dynamic parameters of the litter basket system by introducing active gyroscopic stabilization. The gyroscopes modify the moment of inertia and generate dynamic counter-torque that adapts to changing aerodynamic conditions, transforming an unstable system into a stabilized one during the rescue operation.

Inventive Principle:

Principle #35Parameter changes

2Speed

If the litter basket spins at high speed, then the helicopter can maintain hover position, but the patient experiences discomfort and danger

Engineering Contradiction:

Improvehelicopter hover capabilityVSAvoidpatient discomfort and danger

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful spinning motion into a beneficial stabilization effect. The gyroscopes capture the rotational energy and convert it into counter-torque that actively prevents unwanted spinning. The flywheels store kinetic energy and release it as stabilizing moment, transforming the potentially harmful motion into a useful stabilization mechanism that protects the patient.

Inventive Principle:

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

3Reliability

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

Engineering Contradiction:

Improvepatient safetyVSAvoidlitter basket system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the stabilization function into separate gyroscope units that can be independently mounted on the litter basket. Each gyroscope is a discrete module with its own flywheel and motor, allowing the system to achieve stabilization through modular components rather than a monolithic complex structure. This segmentation makes the system more manageable and easier to integrate.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces gyroscopes as intermediary elements between the litter basket and the harmful aerodynamic forces. The gyroscopes act as mediators that absorb and counteract the spinning forces before they can affect the patient. This intermediary approach provides a clean separation between the patient care function and the stabilization function, reducing overall system complexity while improving safety.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 gyroscope system effectively stabilizes the litter basket, preventing excessive spinning and ensuring patient safety during rescue operations.

Implementation Method 1

A patient litter basket spin control assembly is disclosed, comprising a first gyroscope, and a motion sensor for sensing an angular acceleration of a patient litter basket. 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 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 conservation: Angular Momentum Conservation

Data Source

PatentUS20250312206A1Gyroscope assisted helicopter rescue lift systems and methods

Publication Date: 2025.10.09 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.