Derivative works — US Patent 12359506

Defensive Disclosure and Prior Art Generation

Reference Patent: US 12359506 B2
Title: Multifunction button for ladder adjustment
Core Technology: An articulating ladder hinge button assembly incorporating an integrated tool-holding slot, formed by a gap between a first and second body of the assembly.
Date of Disclosure: May 1, 2026

Derivative Works & Technical Disclosures

Axis 1: Material & Component Substitution

1.1 Derivative: High-Performance Composite and Alloy Button Assembly

Enabling Description: This variation of the hinge button assembly is designed for applications demanding maximum strength-to-weight ratios and durability, such as in aerospace or professional motorsports. The "first button body" (the main, user-actuated component) is fabricated from a carbon fiber reinforced polymer (CFRP) using a compression molding process with a high-modulus pre-preg material (e.g., Toray T800/3900-2). The "second button body" or "plate structure" is machined from a Grade 5 titanium alloy (Ti-6Al-4V). The two components are bonded using an aerospace-grade structural epoxy (e.g., Hysol EA 9394) and mechanically fastened with countersunk titanium screws, ensuring no galvanic corrosion. The resulting assembly provides the claimed tool-holding gap while offering a 60% weight reduction over aluminum and a 400% increase in tensile strength compared to glass-filled nylon.

Mermaid Diagram:

graph TD
    subgraph Hinge Button Assembly
        A(First Button Body <br> CFRP - Toray T800)
        B(Second Button Body / Plate <br> Ti-6Al-4V Alloy)
        C{Structural Adhesive <br> Hysol EA 9394}
        D[Mechanical Fasteners <br> Titanium Screws]
    end
    A -- C --> B
    A -- D --> B
    B -- Forms --> E(Tool-Holding Gap)
    E -- Engages --> F(Tool Clip)

1.2 Derivative: Modular, Quick-Change Tool Holder Button System

Enabling Description: This disclosure describes a hinge button assembly where the tool-holding feature is a field-replaceable, modular component. The "first button body" is injection molded from ABS plastic and features a standardized dovetail slide mount on its outer face. The "second button body" is not integrated but is part of a separate module. Several functional modules are disclosed:
1. Clip Holder Module: A glass-filled nylon plate that creates the standard tool-holding gap.
2. Magnetic Holder Module: A module with an embedded array of N52 neodymium magnets.
3. Bit Holder Module: A module with hexagonal holes for 1/4-inch driver bits.
4. Cable Management Module: A module with a flexible TPE hook for routing wires.
  Each module slides onto the dovetail mount and is secured by a spring-loaded detent pin, allowing the user to customize the hinge button's functionality without tools.

Mermaid Diagram:

classDiagram
  HingeButtonBody <|-- DovetailMount
  DovetailMount <|-- ModuleInterface
  ModuleInterface <.. ClipHolderModule : implements
  ModuleInterface <.. MagneticHolderModule : implements
  ModuleInterface <.. BitHolderModule : implements
  class HingeButtonBody {
    +ABS_Material
    +ActuationSurface
  }
  class DovetailMount{
    +StandardizedProfile
    +LockingDetentReceiver
  }
  class ModuleInterface{
    <<interface>>
    +Attach()
    +Detach()
  }
  class ClipHolderModule{
    +Glass-FilledNylon
    +ToolGap
  }
  class MagneticHolderModule{
    +N52_NeodymiumArray
  }
  class BitHolderModule{
    +HexagonalApertures
  }

Axis 2: Operational Parameter Expansion

2.1 Derivative: Cryogenic/Autoclave-Resistant Button Assembly

Enabling Description: A variation designed for sterile environments (medical, pharmaceutical) or extreme cold (cryogenics). The entire button assembly, including both first and second bodies, is machined from a single block of polyether ether ketone (PEEK). This material is chosen for its extreme thermal stability (-100°C to +250°C), hydrolytic stability (allowing for repeated steam autoclave sterilization), and high mechanical strength. The tool-holding gap is machined directly into the PEEK block. The internal pivot pin and locking pins of the hinge mechanism are fabricated from 316L stainless steel to prevent corrosion during sterilization cycles. This design ensures that the tool-holding function remains reliable after exposure to extreme temperatures and sterilization processes that would degrade conventional polymers or metals.

Mermaid Diagram:

stateDiagram-v2
  [*] --> Idle
  Idle --> Autoclave_Cycle : Sterilize
  Autoclave_Cycle --> Idle : Cool Down
  Idle --> Cryo_Exposure : Use in LN2 Environment
  Cryo_Exposure --> Idle : Return to Ambient
  Idle --> Actuated : User presses button
  Actuated --> Idle : User releases button

  state Autoclave_Cycle {
    direction LR
    [*] --> Heating_134C
    Heating_134C --> Sterilizing
    Sterilizing --> Cooling
    Cooling --> [*]
    note right of Sterilizing : PEEK & 316L Steel components <br> remain stable.
  }
  state Cryo_Exposure {
    [*] --> Cooling_to_-100C
    note right of Cooling_to_-100C : PEEK maintains ductility, <br> avoids brittle fracture.
    Cooling_to_-100C --> [*]
  }

Axis 3: Cross-Domain Application

3.1 Derivative: Aerospace Stowage Bin Latch with Equipment Mount

Enabling Description: This derivative applies the core concept to an aircraft interior cabin latch for an overhead stowage bin. The latch button ("first button body") is molded from a fire-retardant polyetherimide (PEI) resin like Ultem 1010, complying with FAA regulations. The "second button body" is integrated into this molding, creating the tool-holding gap. This gap is dimensioned to comply with a new internal standard (e.g., "ARINC 950 Clip Specification") for attaching low-mass emergency equipment, such as a CPR mask pouch or a decompression sickness treatment kit. By integrating the mount point into the existing latch mechanism, the design eliminates the need for a separate bracket, reducing part count, weight, and installation time.

Mermaid Diagram:

sequenceDiagram
    participant User
    participant LatchAssembly
    participant StowageBin
    participant EmergencyKit

    User->>LatchAssembly: Presses Button (Ultem 1010 Body)
    LatchAssembly->>StowageBin: Retracts Pawl
    StowageBin-->>User: Opens
    User->>EmergencyKit: Grasps Kit
    EmergencyKit->>LatchAssembly: Detaches from ARINC 950 Clip Slot
    User->>StowageBin: Closes
    StowageBin->>LatchAssembly: Engages Pawl

3.2 Derivative: Medical Cart Height-Adjustment Latch with Cable Router

Enabling Description: An adjustment button for a telescoping pole on a medical IV stand or mobile equipment cart. The entire button assembly is molded from a medical-grade polycarbonate with an antimicrobial additive (e.g., silver-ion based). The "gap" is specifically designed not for tool clips, but as a cable/tubing management channel. Its internal surfaces are rounded to a 5mm radius to prevent kinking or damage to sensitive IV lines or sensor cables. The "plate structure" acts as a protective shield, preventing accidental snagging or dislodging of the routed cables as the cart is moved through a busy hospital environment. The assembly is sealed to achieve an IP65 rating, allowing for full chemical wipe-down and disinfection.

Mermaid Diagram:

graph TD
    subgraph Medical Cart Pole
        A[Telescoping Tube] --> B{Height-Adj. Button}
        B -- Integrated into --> C(Antimicrobial PC Housing)
        C -- Contains --> D(Locking Pin Mechanism)
        C -- Features --> E(Cable Routing Gap)
        F[IV Tubing / Sensor Cable] --> E
    end
    G(User) -- Presses --> B
    B -- Releases --> A

Axis 4: Integration with Emerging Tech

4.1 Derivative: IoT-Enabled Tool Presence and Load Monitoring Button

Enabling Description: The hinge button assembly incorporates a sensor suite for smart inventory and safety management on a construction site. A thin-film force-sensitive resistor (FSR) is laminated to the interior surface of the "gap." An optical gate sensor (infrared LED and phototransistor pair) is positioned across the gap opening. These sensors connect to a microcontroller (e.g., ESP32-C3) and a 100mAh LiPo battery co-molded within the "first button body." When a tool is inserted, the optical gate is broken, and the FSR measures the applied weight. This data (Tool_Presence=True, Weight=grams) is transmitted via Bluetooth Low Energy (BLE) to a site gateway. This allows for real-time tool tracking, alerts if a heavy tool is placed on a light-duty ladder, and "last-seen" location data to prevent tool loss.

Mermaid Diagram:

sequenceDiagram
    participant Tool
    participant HingeButton
    participant ESP32_MCU
    participant BLE_Gateway
    participant Cloud_Platform

    Tool->>HingeButton: Inserted into Gap
    HingeButton->>ESP32_MCU: Optical gate broken, FSR senses pressure
    ESP32_MCU->>ESP32_MCU: Read sensor data (Presence=T, Weight=1.2kg)
    ESP32_MCU-->>BLE_Gateway: Transmit BLE advertising packet
    BLE_Gateway->>Cloud_Platform: Forward data via MQTT
    Cloud_Platform->>Cloud_Platform: Log tool presence & location

Axis 5: The "Inverse" or Failure Mode

5.1 Derivative: Calibrated Shear-Point Failure Plate

Enabling Description: This design prioritizes the integrity of the core ladder hinge in an overload event. The "first button body" is made from a high-impact polymer like polycarbonate. The "second button body" (the plate) is a separate component made from a more brittle, lower-cost polymer like polystyrene. It attaches to the main body via two small, precisely-engineered cylindrical pins that act as shear points. The diameter of these pins is calculated to fail under a specific shear stress, corresponding to a static load of 25 kg. If the ladder falls and the tool holder impacts the ground, or if it is used improperly as a step, the pins shear off, and the plate detaches. This sacrificial failure prevents the impact force from being transmitted to the main hinge plates and pivot pin, preserving the structural safety of the ladder. The user can then purchase and snap a new sacrificial plate into place.

Mermaid Diagram:

graph LR
  A[Hinge Button Assembly] --> B(Main Body <br> Polycarbonate)
  A --> C(Sacrificial Plate <br> Polystyrene)
  B -- Connected via --> D{Calibrated Shear Pins}
  C -- Connected via --> D
  E(Overload Event <br> Force > 25kg) -- Applies Force to --> C
  E -- Causes --> D
  D -- State Change --> F(Shear Failure)
  F -- Results in --> G(Plate Detaches)
  G -- Protects --> B

Combination Prior Art with Open-Source Standards

1. Combination with V-Slot Extrusion Profiles:
The core mechanism of the '506 patent is combined with the open-source V-Slot linear rail system. The hinge mechanism, rather than being fixed to a ladder rail, is integrated into a housing that uses V-wheels to ride along a V-Slot extrusion. The hinge button with its integrated tool holder can now be positioned anywhere along the length of any structure built with V-Slot rails, such as a workbench, machine frame, or custom scaffolding. This generalizes the invention from a ladder-specific component to a modular, positionable locking hinge with an integrated tool mount for any system using this common open-source framing standard.

2. Combination with MQTT (Message Queuing Telemetry Transport) Protocol:
The IoT-enabled derivative (Derivative 4.1) is explicitly configured to use the open-standard MQTT protocol for data transmission. The ESP32 microcontroller runs an MQTT client that publishes sensor data (tool presence, weight, button battery level) to a specific topic, such as site/zone3/ladder12/hinge_L/status. Any MQTT-compatible system, from open-source home automation platforms like Home Assistant to enterprise-level IoT backends, can subscribe to this topic to receive and process the data without proprietary hardware or software, creating an interoperable "smart ladder" component.

3. Combination with Qi Wireless Power Standard:
The "second button body" or "plate structure" is redesigned to incorporate a wireless power transmission coil compliant with the open Qi standard (v1.3). The coil is hermetically sealed within the button housing. A small rechargeable battery within the ladder's stile provides power. When a user hangs a Qi-enabled tool (e.g., a modern work light, a laser measure, or a smartphone in a case) from the holder, the tool's receiver coil aligns with the transmitter, and charging begins automatically. This turns the passive tool holder into an active charging station, leveraging an open and widely adopted wireless power standard.