Fastener Head Enclosure With Locking Channel Against Tampering

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Solution Overview

Problem

Existing tamper-resistant bolts often expose the bolt head, making them vulnerable to unauthorized access and disassembly, and existing solutions are either complex or not easily adaptable to conventional bolts, screws, and nuts.

Innovation Solution

An anti-tampering device featuring a housing with a bolt channel and a lock channel, where a lock with a movable locking element prevents the bolt head or nut from being withdrawn, while allowing rotation without hindrance, and is designed to be easily integrated with conventional fasteners.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the bolt head is exposed for easy access, then ease of operation is improved, but security and tamper resistance deteriorate

Engineering Contradiction:

Improveaccess to bolt headVSAvoidtamper resistance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The bolt head is nested inside a cylindrical housing that extends through a support surface. The housing conceals the bolt head while allowing a tool to access and rotate it through a defined opening, achieving both security and operability

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

A padlock with a shackle acts as an intermediary element that secures the housing to a fixed structure. The shackle passes through aligned openings in the housing and support surface, preventing removal of the housing and thus protecting the concealed bolt head

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If special tools are required for installation, then tamper resistance is improved, but ease of manufacture and adaptability deteriorate

Engineering Contradiction:

Improvetamper resistanceVSAvoidadaptability to conventional fasteners

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The housing and padlock assembly serves multiple functions: it conceals the bolt head, prevents removal, and works with conventional bolts and screws that have standard heads. The design adapts to existing fasteners rather than requiring specialized ones

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The security device is segmented into separate components (housing, padlock, shackle) that can be assembled with conventional fasteners. This modular approach allows integration with standard hardware while maintaining tamper resistance

Inventive Principle:

Principle #1Segmentation

3Reliability

If the bolt head is concealed for security, then tamper resistance is improved, but ease of operation deteriorates

Engineering Contradiction:

Improvetamper resistanceVSAvoidaccess to bolt head

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The housing provides complete concealment of the bolt head except for a localized opening that accommodates the tool. This localized access point maintains security while enabling operation with standard tools

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11802585B2Anti-tampering device that envelopes the head of a fastener

Publication Date: 2023.10.31 DYNAMIC MANUFACTURING GROUP LLC

AI summary

An anti-tampering device includes a housing with a bolt channel and a lock channel. The lock channel is aligned with, intersects and is perpendicular to the bolt channel. A head of a bolt and a portion of a shank of a bolt is received in the bolt channel. A lock received in the lock channel extends into the bolt channel, in proximity to the shank of the bolt, when the lock is in a locked position. The portion of the lock extending into the bolt channel prevents removal of the head of the bolt from the bolt channel.