Throw Lock Assembly with Segmented Cut-Resistant Bolt

Solution Overview

Problem

There is a need for lock systems that effectively resist break-in attacks, particularly those using steel tools like hacksaws, while being cost-effective, flexible in material selection, and durable for outdoor use, with a long working life and high corrosion resistance.

Innovation Solution

A throw lock assembly featuring a throw bolt with a cutting barrier housed in a bolt casing, where the cutting barrier is harder than the casing and more abrasion-resistant, and the bolt casing is more corrosion-resistant, with the cutting barrier shielded within the bolt casing to prevent exposure to the environment, allowing for high resistance to steel tool attacks and prolonged durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a cutting barrier is used to resist break-in attacks by steel tools, then the resistance to hacksaw attacks is improved, but the corrosion resistance deteriorates

Engineering Contradiction:

Improveresistance to break-in attacksVSAvoidcorrosion resistance

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The throw bolt is divided into two distinct functional parts: a cutting barrier portion made of hardened steel for resisting break-in attacks, and a bolt casing portion made of corrosion-resistant material for protecting against environmental degradation. This segmentation allows each part to be optimized for its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The throw bolt combines two different materials with complementary properties: hardened steel providing high strength and abrasion resistance for the cutting barrier, and a corrosion-resistant material (such as stainless steel or weathering steel) for the bolt casing. This composite construction resolves the contradiction between needing high strength for security and high corrosion resistance for durability.

Inventive Principle:

Principle #40Composite materials

2Strength

If a harder material is used for the cutting barrier, then the abrasion resistance is improved, but the corrosion resistance worsens

Engineering Contradiction:

Improveabrasion resistanceVSAvoidcorrosion resistance

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The throw bolt is divided into two distinct functional parts: a cutting barrier portion made of hardened steel for resisting break-in attacks, and a bolt casing portion made of corrosion-resistant material for protecting against environmental degradation. This segmentation allows each part to be optimized for its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the throw bolt are assigned different material properties: the cutting barrier portion uses hardened steel with high abrasion resistance where mechanical strength is critical, while the bolt casing uses corrosion-resistant material where environmental durability is critical. This local differentiation of material quality resolves the contradiction between abrasion resistance and corrosion resistance.

Inventive Principle:

Principle #3Local quality

3Strength

If the cutting barrier is exposed to the environment, then the break-in resistance is maintained, but the working life outdoors deteriorates

Engineering Contradiction:

Improvebreak-in resistanceVSAvoidworking life outdoors

Core Design Contradiction:

StrengthVSDuration of action of stationary object

Solution Approach 1:

The throw bolt is divided into two distinct functional parts: a cutting barrier portion made of hardened steel for resisting break-in attacks, and a bolt casing portion made of corrosion-resistant material for protecting against environmental degradation. This segmentation allows each part to be optimized for its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The bolt casing acts as an intermediary protective layer that shields the cutting barrier from direct environmental exposure while allowing the cutting barrier to maintain its break-in resistance function. The corrosion-resistant casing mediates between the harsh outdoor environment and the cutting barrier, preventing environmental damage without compromising security performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11591833B2Throw lock assemblies, throw bolt assemblies, and methods for assembling and using same

Publication Date: 2023.02.28 BJA TRADING LTD

AI summary

A lock assembly comprising a throw bolt, a bolt holder and a bolt keeper. The bolt comprises a cutting barrier and a bolt casing, the bolt casing being more corrosion-resistant than the cutting barrier, and the cutting barrier being more abrasion-resistant that the bolt casing. When assembled, the cutting barrier will be enclosed within the bolt casing.