Rotating Spearhead Door Breach Device

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Solution Overview

Problem

Existing door breaching methods, such as prying, explosive, and ballistic mechanisms, are either time-consuming, hazardous, or ineffective for reinforced and outward-opening doors, posing risks to breach teams and being unsuitable for quick action in critical scenarios.

Innovation Solution

A mechanical door breach device featuring a spearhead with a rotational pivot mechanism that punctures the door and deploys into a 'T' shape, allowing for rapid breach by leveraging gravity to pull the door off its hinges or break it, minimizing explosive risks and effort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If explosive mechanisms are used to breach doors, then the door can be eliminated quickly, but the blast effects pose extreme danger to the breach team and hostages

Engineering Contradiction:

Improvebreach speedVSAvoidblast exposure risk

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent replaces explosive mechanisms with a purely mechanical puncture and lever system. The spearhead punctures the door and the lever inserted into the shaft cavity provides mechanical advantage to pull the door open, eliminating blast effects while maintaining rapid breach capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The shaft and lever act as intermediary mechanical elements between the breach team and the door. Instead of direct explosive contact, the team applies force through the lever on the shaft, which transmits this force to puncture and open the door without creating harmful blast waves

Inventive Principle:

Principle #24Intermediary (Mediator)

2Force

If prying mechanisms are used to breach doors, then leverage can be applied at the lock point, but the process is time-consuming and ineffective for certain door types

Engineering Contradiction:

Improveleverage forceVSAvoidbreach time

Core Design Contradiction:

ForceVSLoss of time

Solution Approach 1:

Instead of prying from the outside or attempting to force the lock, the invention inverts the approach by puncturing through the door from the team's side and using the lever inserted into the shaft cavity to pull the door open from the inside, reversing the traditional prying direction and mechanism

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The invention transitions from two-dimensional prying at the lock point to three-dimensional puncture through the door thickness. The spearhead penetrates through the door material, and the lever operates within the shaft cavity, adding a depth dimension to the breach mechanism

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Speed

If ballistic mechanisms are used to eliminate locks, then quick breach is achieved, but the method is only applicable to lighter doors and ineffective for reinforced steel doors

Engineering Contradiction:

Improvebreach speedVSAvoiddoor type applicability

Core Design Contradiction:

SpeedVSAdaptability or versatility

Solution Approach 1:

The invention employs dynamic elements including the rotatable spearhead that can pivot and the lever that can be inserted and manipulated within the shaft cavity. This dynamic mechanism adapts to different door types and conditions, providing both speed and versatility

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The shaft and lever mechanism serves multiple functions: it can puncture various door materials, provide leverage for different lock types, and adapt to different door thicknesses. The same basic mechanism works on lighter doors as well as reinforced steel doors, providing universal applicability

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enables rapid and safe breaching of reinforced and outward-opening doors with minimal effort, reducing health risks for breach teams and providing a versatile tool for various door types, including those traditionally difficult to access.

Implementation Method 1

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentUS11497944B2Device and method for breaching outward opening and reinforced doors

Publication Date: 2022.11.15 CFD RESEARCH CORP

AI summary

A door breach device can include: an elongate shaft having a first end and an opposite second end; a pivot mechanism at the first end of the shaft; a spearhead rotatably coupled with the pivot mechanism and having a tip on a tip-side of the pivot mechanism and having a shaft cavity on a shaft-side, where the shaft cavity is adapted to receive the shaft therein; a restraint slidably received on the shaft-side of the spearhead and on the shaft; a handle protruding from the shaft; and a hitch at the second end of the shaft. A method of breaching a door can include: forcing the spearhead through a door until the restraint releases the spearhead and the spearhead rotates by the pivot mechanism so as to form an angle with the shaft; and pulling the spearhead against the door until the door is breached.