Concealed Handcuff Key Housings for Search Evasion and Access

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Solution Overview

Problem

In law enforcement and military contexts, victims are at risk of being handcuffed by malefactors who may search for standard universal handcuff keys, necessitating the need for concealed keys that appear as everyday items to avoid detection.

Innovation Solution

Concealed handcuff keys are designed to resemble common items such as zipper pulls, pen caps, coins, belt buckle receptacles, and shoelace ends, featuring malleable materials and hidden mechanisms to remain unnoticed during searches, with designs that include cord or pen attachment systems and deformable components to securely hold the key.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a standard universal handcuff key is carried, then the key can be easily used to unlock handcuffs, but the key can be easily detected and searched for by malefactors

Engineering Contradiction:

Improveease of useVSAvoiddetectability

Core Design Contradiction:

Ease of operationVSDifficulty of detecting and measuring

Solution Approach 1:

The handcuff key is nested within a common item housing (zipper pull, pen cap, coin, belt buckle receptacle, or shoelace end). The key is concealed inside these everyday objects, making it invisible during external searches while remaining accessible to the wearer.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

A housing or container acts as an intermediary between the handcuff key and the external environment. This housing resembles common items and serves as a camouflage layer, preventing detection while allowing the key to function when needed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Difficulty of detecting and measuring

If the key is concealed within a common item, then the key becomes hidden from detection, but the key must be easily accessible when needed

Engineering Contradiction:

ImprovedetectabilityVSAvoidaccessibility

Core Design Contradiction:

Difficulty of detecting and measuringVSEase of operation

Solution Approach 1:

The key is pre-positioned within the housing in a specific orientation and location that allows for quick retrieval. The housing is designed with features (such as cord attachment points, friction-fit mechanisms, or specific geometries) that enable the wearer to access the key immediately when needed, without requiring complex manipulation.

Inventive Principle:

Principle #10Preliminary action

3Difficulty of detecting and measuring

If the housing is made opaque to conceal the key, then the key is hidden from view, but the housing material must still be workable for attachment and manipulation

Engineering Contradiction:

ImprovevisibilityVSAvoidmaterial workability

Core Design Contradiction:

Difficulty of detecting and measuringVSEase of manufacture

Solution Approach 1:

The housing is made from flexible or malleable materials (fabric, leather, rubber, plastic) that can be easily manufactured, attached to common items, and manipulated. These materials provide sufficient opacity to conceal the key while remaining workable for creating attachments like zipper pulls, pen caps, or belt buckle receptacles.

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS8776563B1Concealed handcuff key

Publication Date: 2014.07.15 SHOMER TEC

AI summary

Described herein are several versions of concealed handcuff keys including a key concealed within a pouch as a zipper pull, a key concealed as a common pen cap/clip, a key concealed as a coin, a key concealed as a bootlace/shoelace end, and a key concealed within a receiver in the back side of a belt buckle.