Enhanced Ligature Resistant Wardrobe System

Publication ID: 24-11857476_0006_PTD
Published: October 28, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced Ligature Resistant Wardrobe System,” Published Technical Disclosure No. 24-11857476_0006_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857476_0006_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,476.

Summary of the Inventive Concept

An improved intensive use wardrobe system featuring advanced security and safety enhancements, designed to mitigate contraband storage and ligature risks in institutional settings.

Background and Problem Solved

The original Ligature Resistant Wardrobe patent, while providing a solution for intensive use shelving furniture, still poses limitations in terms of contraband storage and ligature risks. The new inventive concept addresses these limitations by introducing a sloped top, contraband barrier, reinforced shelf, and sensor-activated alarm system, thereby enhancing the overall safety and security of the wardrobe system.

Detailed Description of the Inventive Concept

The Enhanced Ligature Resistant Wardrobe System comprises a one-piece cabinet with a sloped top, designed to prevent objects from being placed on the top, thereby reducing the risk of contraband storage. The system features a ligature resistant hanger engagement and a contraband barrier to prevent unauthorized access. Additionally, the wardrobe includes a reinforced shelf capable of withstanding excessive weight or force, reducing the risk of damage or collapse. A sensor-activated alarm system detects objects placed on the top of the wardrobe, alerting authorities in response to detection of an object. The system's modular design allows for customization to meet the specific needs of a particular institution or facility.

Novelty and Inventive Step

The new inventive concept introduces several novel features, including the sloped top, contraband barrier, reinforced shelf, and sensor-activated alarm system, which collectively provide a significant improvement over the original patent. These advancements address the inherent limitations of the existing patent, providing a more comprehensive and effective solution for intensive use shelving furniture.

Alternative Embodiments and Variations

Alternative embodiments of the Enhanced Ligature Resistant Wardrobe System may include variations in the design of the sloped top, contraband barrier, or reinforced shelf. Additionally, the system could be adapted for use in different types of institutions, such as schools or hospitals, by modifying the materials, dimensions, or features of the wardrobe.

Potential Commercial Applications and Market

The Enhanced Ligature Resistant Wardrobe System has significant commercial potential in the institutional furniture market, particularly in high-security settings such as prisons, jails, detention centers, and psychiatric facilities. The system's advanced security and safety features make it an attractive solution for institutions seeking to mitigate contraband storage and ligature risks.

CPC Classifications

SectionClassGroup
A A61 A61G7/047
A A47 A47C19/22
A A47 A47C31/00
A A61 A61G7/05

Field of Art

Institutional furniture design, specifically safety-focused furniture for high-risk environments like detention centers, psychiatric facilities, and correctional institutions, with expertise in ergonomic design, security features, and materials engineering

Person of Ordinary Skill (PHOSITA) Profile

A design engineer with 5-7 years experience in institutional furniture, familiar with safety regulations, materials science, security constraints, and human factors engineering, with knowledge of preventing potential misuse of furniture components

Obviousness Rationale

A person skilled in the art would recognize that the Enhanced Ligature Resistant Wardrobe System represents predictable incremental improvements to the existing ligature resistant wardrobe patent, utilizing standard design modifications and known security techniques. The proposed variations address inherent limitations in the original design through straightforward engineering solutions that would be apparent to a skilled practitioner. The sensor-activated alarm, sloped top, and modular design represent logical extensions of the original patent's core security principles.

Obvious Combinations & Variations

Source Patent Element
Ligature resistant clothes hanger support with recessed pocket
PTD Variation
Adding a sensor-activated alarm system to detect unauthorized object placement
Obviousness Reasoning
A PHOSITA would recognize that adding electronic monitoring to existing security features is a predictable solution for enhancing institutional furniture safety, using standard sensor and alarm technologies
Source Patent Element
One-piece cabinet with sloped surfaces
PTD Variation
Explicitly designing the sloped top to prevent object placement and contraband storage
Obviousness Reasoning
Modifying surface geometry to prevent misuse is a known design technique in institutional furniture, representing a straightforward design choice to address potential security vulnerabilities
Source Patent Element
Wardrobe with back panel and fastener holes
PTD Variation
Implementing a modular design allowing customization for different institutional requirements
Obviousness Reasoning
Creating adaptable furniture designs is a standard engineering approach, particularly in specialized markets requiring flexible solutions across different facility types
Source Patent Element
Intensive use furniture with contraband prevention features
PTD Variation
Reinforcing the shelf to withstand excessive weight and prevent potential structural compromise
Obviousness Reasoning
Strengthening structural components to resist potential misuse is a predictable engineering solution in high-stress institutional environments
Source Patent Element
Ligature resistant wardrobe with storage opening
PTD Variation
Adding a comprehensive contraband barrier within the wardrobe storage system
Obviousness Reasoning
Implementing additional barriers to prevent unauthorized access represents a logical extension of existing security design principles in institutional furniture
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857476 and the technical variations disclosed herein, a person having ordinary skill in the art would find the Enhanced Ligature Resistant Wardrobe System claims obvious and anticipatable, as the proposed modifications represent predictable engineering solutions utilizing known techniques in institutional furniture design, thereby rendering subsequent similar claims unpatentable under 35 U.S.C. Section 103.

Original Patent Information

Patent NumberUS 11,857,476
TitleLigature resistant wardrobe
Assignee(s)Norix Group, Inc