Force Reduction Release Mechanism for Parachute Cargo Systems

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Solution Overview

Problem

High-weight loads during drogue-fall in parachute cargo systems require high release activation forces, leading to increased energy consumption and cumbersome mechanisms, with prior solutions like single latch systems and pyrotechnic cutters suffering from premature releases and regulatory issues.

Innovation Solution

A force reduction release mechanism that couples a parachute with its cargo, allowing release of tensioned lines using an activation force significantly lower than the load, featuring a support frame with interlockable levers and a trigger system to transition from a closed to an open state, reducing the required release force.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single latch system is used for releasing the drogue parachute, then the device complexity is reduced, but the reliability deteriorates due to premature releases at high altitude and high wind blast exit forces

Engineering Contradiction:

Improverelease mechanism structureVSAvoidrelease reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The release mechanism is divided into multiple independent latch elements (first latch element and second latch element) that work together. Each latch element has its own lever, trigger, and engagement features, creating a segmented system that distributes the release function across multiple components rather than relying on a single latch.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mechanism includes retention features and engagement surfaces that prepare the latch elements for reliable engagement before release is needed. The levers are positioned and constrained in advance to ensure proper alignment and force distribution when the drogue parachute experiences high wind blast or altitude conditions.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Force

If a pyrotechnic explosive cutter is used to sever the drogue parachute, then the release force is reduced, but harmful factors increase due to premature releases and regulatory issues with hazardous materials

Engineering Contradiction:

Improverelease activation forceVSAvoidpremature releases and regulatory hazards

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the pyrotechnic explosive system with a purely mechanical latch-and-trigger mechanism. The release is achieved through mechanical advantage using levers that amplify the trigger force, eliminating the need for explosives or hazardous materials while maintaining low release activation forces.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The mechanism introduces intermediary components (levers, latches, and engagement surfaces) between the trigger and the drogue parachute release. These intermediaries mechanically amplify the trigger force and control the release sequence, replacing the direct explosive action with a controlled mechanical transmission system.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Weight of moving object

If high-weight loads are carried during drogue-fall, then the load capacity is increased, but the release activation force increases requiring additional energy and cumbersome mechanisms

Engineering Contradiction:

Improvecargo load weightVSAvoidrelease activation force

Core Design Contradiction:

Weight of moving objectVSForce

Solution Approach 1:

The release mechanism uses dynamic lever systems that can adapt to different load weights. The levers are designed to rotate and pivot, allowing the mechanical advantage ratio to be optimized for the specific weight being carried. This dynamic adjustment capability enables the same mechanism to handle varying cargo loads without requiring proportionally higher release forces.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The mechanism changes the force parameter through mechanical advantage provided by the lever system. By positioning the fulcrum and lever arms at specific distances, the system transforms a small trigger force into a large release force capable of overcoming high-weight load tensions, effectively decoupling the release activation force from the cargo weight.

Inventive Principle:

Principle #35Parameter changes

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 mechanism effectively reduces the release force needed for parachutes, preventing premature releases and increasing load capacity while ensuring reliable operation and compliance with regulatory standards.

Implementation Method 1

A force reduction release mechanism that couples a parachute with its cargo, allowing release of tensioned lines using an activation force significantly lower than the load

Methodology Applied

Scientific EffectMechanical Advantage: Mechanical Advantage

Data Source

PatentUS11667389B2Release mechanism device, parachute systems and parachute stabilization

Publication Date: 2023.06.06 P D OF MIAMI INC

AI summary

An article of manufacture, a force reduction release mechanism and system for selectively maintaining and releasing components under tensile tension, the release mechanism offering mechanical gain such that the force required to activate a release between the components is a mere fraction of the heavy tensile tension force. Other aspects of the invention include novel cargo parachute system utilizing the release mechanism and a parachute stabilization arrangement utilizing at least one releasable stabilization anchor.