Derivative works — US Patent 8695486

Defensive Disclosure: US Patent 8695486 - Derivative Variations

This document presents a defensive disclosure for US Patent 8695486, "Plunger-filter beverage-making machine with a closable pouring opening." The objective is to establish prior art for various derivative improvements, rendering them obvious or non-novel for future patent applications. This analysis focuses on extrapolating beyond the core claims (primarily claims 1 and 14) and illustrative embodiments of the patent by exploring alternative materials, operational parameters, cross-domain applications, integration with emerging technologies, and inverse/failure modes.

Derivative 1: Lever-Actuated Pouring Opening with Electro-Magnetic Actuation

Axis: Material & Component Substitution

Enabling Description:
This derivative replaces the mechanical lever (33) and compression spring (34) of US8695486 with an electro-magnetic actuation system for controlling the pouring opening (37). A miniature linear solenoid or voice coil actuator is integrated into the lid bottom part (32) beneath the position of the original lever's actuating region (331). The solenoid plunger is mechanically linked to the closure body (36) or an intermediate linkage connected to it. Upon activation, an electrical current energizes the solenoid, generating a magnetic force that pulls the plunger, lifting the closure body (36) from the pouring opening (37). A passive return spring (e.g., a simple coil spring or elastic polymer) or a bistable solenoid design ensures the closure body returns to its closed position upon deactivation. The actuating surface (331) is replaced by a low-profile capacitive touch sensor or a momentary push-button switch integrated into the lid top part (31) or lid bottom part (32), electrically connected to the solenoid's driver circuit (e.g., a microcontroller and H-bridge driver). Power is supplied by a small, rechargeable lithium-ion battery housed within the lid assembly, or via inductive charging. The closure body (36) itself can be fabricated from a ferromagnetic material or incorporate a small magnet to enhance interaction with an external magnetic field, allowing non-contact magnetic opening/closing, or a resilient, non-ferromagnetic polymer (e.g., EPDM rubber) for sealing against the pouring opening.

flowchart TD
    A[User Input: Touch Sensor / Button] --> B(Microcontroller)
    B --> C{Solenoid Driver Circuit}
    C --> D[Linear Solenoid Actuator]
    D -- Mechanical Linkage --> E[Closure Body (36)]
    E -- Lifts / Lowers --> F[Pouring Opening (37)]
    F --> G[Vessel Interior (23) to Spout (328)]
    H[Battery / Inductive Charging] --> B
    H --> C

Derivative 2: Sintered Metal Plunger-Filter with Ultrasonic Self-Cleaning

Axis: Material & Component Substitution

Enabling Description:
This derivative modifies the plunger-filter (43) of US8695486. The fine wire mesh (432) is replaced with a cylindrical or frustoconical filter element composed of a porous, sintered metal (e.g., food-grade stainless steel or titanium alloy) with a controlled pore size (e.g., 5-50 microns). This sintered metal filter provides enhanced rigidity, durability, and a consistent filtration surface. Integrated within the plunger-filter assembly, either circumferentially around the sintered filter or embedded within the fixing plate (434), are one or more piezoelectric ultrasonic transducers. These transducers are electrically connected to a miniature ultrasonic generator circuit, powered by a small, sealed battery or through inductive power transfer from the piston rod (41) assembly. After plunging and beverage dispensing, upon a user-initiated command (e.g., pressing the grip element (42) twice rapidly or a dedicated button on the piston rod), the ultrasonic transducers are activated. High-frequency vibrations (e.g., 20-100 kHz) are transmitted through the sintered metal, dislodging trapped coffee grounds or tea leaves from the pores, facilitating self-cleaning when rinsed or submerged in water. The perforated plate (431) may be omitted or simplified, as the sintered metal provides structural integrity.

classDiagram
    class PlungerFilter {
        +PistonRod 41
        +ActuatingKnob 42
        +SinteredMetalFilter
        +UltrasonicTransducers
        +UltrasonicGeneratorCircuit
        +PowerSource
    }
    class SinteredMetalFilter {
        +PoreSize: 5-50µm
        +Material: StainlessSteel/Titanium
    }
    class UltrasonicTransducers {
        +Frequency: 20-100kHz
        +Material: Piezoelectric
    }
    PlungerFilter --> SinteredMetalFilter
    PlungerFilter --> UltrasonicTransducers
    UltrasonicTransducers --o UltrasonicGeneratorCircuit

Derivative 3: Industrial-Scale Batch Beverage Infuser with Lever-Actuated Dispensing

Axis: Operational Parameter Expansion (Scale)

Enabling Description:
This derivative scales up the beverage-maker design to an industrial or commercial batch infuser with a capacity ranging from 50 to 200 liters, or more. The "vessel" (2) becomes a large, insulated brewing tank, constructed from food-grade stainless steel. The "filter piston" (4) is a heavy-duty, pneumatically or hydraulically actuated filter press, comprising a large-diameter piston rod (41) connected to an oversized plunger-filter (43) capable of withstanding significant downward force. The plunger-filter consists of a robust perforated plate and multiple layers of industrial-grade stainless steel mesh or a finely woven filter cloth (e.g., polyester or polypropylene) supported by a rigid frame. The "lid" (3) is a substantial, removable or hinged cover for the brewing tank, also made of stainless steel. It features an enlarged "pouring opening" (37) and a corresponding "spout" (328) for high-volume liquid discharge. The "elongated lever" (33) and "closure body" (36) are scaled proportionally. The lever mechanism is constructed from high-strength alloys (e.g., stainless steel, anodized aluminum) and is actuated by a robust pneumatic cylinder or an electric linear actuator, controlled by a programmable logic controller (PLC). The "actuating surface" (331) becomes a large industrial push-button or a touch-panel interface. Safety interlocks (e.g., pressure sensors, level sensors) are integrated to prevent accidental opening during brewing cycles or when the vessel is under pressure.

flowchart TD
    A[Industrial Brewing Tank (50-200L+)] --> B[Lid Assembly (Industrial Grade)]
    B --> C[Pouring Opening (Large Diameter)]
    B --> D[Industrial Spout]
    B --> E[Actuator-Controlled Lever Mechanism]
    E -- Actuation Signal --> F(PLC / Control System)
    F -- User Input --> G[HMI / Push-button Interface]
    H[Pneumatic/Hydraulic Cylinder] --> I[Heavy-Duty Plunger-Filter]
    I --> A
    E -- Opens/Closes --> C
    C -- Liquid Flow --> D

Derivative 4: Low-Temperature, High-Pressure Cold Brew Extraction System

Axis: Operational Parameter Expansion (Temperature & Pressure)

Enabling Description:
This derivative adapts the plunger-filter beverage maker for specialized cold brew extraction under low temperatures and elevated pressures. The "vessel" (2) is constructed from a reinforced, pressure-rated material, such as borosilicate glass with a metal exoskeleton, or a thick-walled stainless steel cylinder, capable of withstanding internal pressures up to 5 bar. It is designed with integrated cooling coils or a double-wall vacuum jacket for maintaining refrigerated temperatures (0-10°C). The "lid" (3) is a pressure-sealing component, incorporating a pressure relief valve and a pressure gauge. The "piston rod" (41) and "plunger-filter" (43) are designed for pressure applications, with the plunger-filter featuring a multi-stage filtration stack (e.g., coarse pre-filter, fine mesh, activated carbon layer) and robust sealing elements (e.g., high-durometer EPDM O-rings). The "elongated lever" (33) and "closure body" (36) are constructed from pressure-resistant materials (e.g., stainless steel, PEEK) and the closure body features a high-pressure seal (e.g., a Viton® O-ring or a resilient fluoropolymer seal) against the pouring opening (37). The lever actuation mechanism (331) is reinforced, possibly with a mechanical advantage system or a small pneumatic actuator, to overcome internal pressure for opening. The entire system operates within a controlled refrigerated environment.

graph TD
    A[Reinforced Pressure Vessel (0-10°C)]
    A -- Contains --> B[Cold Brew Mixture]
    B -- Filtrated by --> C[Pressure-Rated Plunger-Filter]
    C -- Driven by --> D[Reinforced Piston Rod]
    D -- Passes through --> E[Pressure-Sealing Lid]
    E -- Includes --> F[Pressure Gauge]
    E -- Includes --> G[Pressure Relief Valve]
    E -- Features --> H[Reinforced Lever Mechanism]
    H -- Actuates --> I[High-Pressure Closure Body]
    I -- Seals --> J[Pouring Opening]
    J -- Connects to --> K[Spout]

Derivative 5: Botanical Solvent Extractor with Gravity-Assisted Lever Dispensing

Axis: Cross-Domain Application (Chemical Extraction/Separation)

Enabling Description:
This derivative applies the plunger-filter mechanism to a laboratory or small-scale industrial setting for solid-liquid botanical extraction using various solvents (e.g., ethanol, water, vegetable oils). The "vessel" (2) is a chemically resistant container, such as borosilicate glass or 316L stainless steel, with a solvent-compatible internal coating if needed. The "filter piston" (4) assembly is designed to handle different botanical materials, with the "plunger-filter" (43) featuring interchangeable filter media (e.g., cellulose filter paper, polypropylene mesh, sintered stainless steel disks) appropriate for various particle sizes and chemical compatibilities. The "lid" (3) and the components of the "elongated lever" (33) and "closure body" (36) are constructed from solvent-resistant materials (e.g., PTFE, PEEK, Hastelloy, or solvent-resistant elastomers like Kalrez® for seals). The pouring opening (37) and spout (328) are designed for controlled dispensing of extracted liquid, potentially with a finer mesh or additional filter at the spout outlet. The lever (33) is configured to provide a clear and controlled opening, and the dispensing process relies on gravity, potentially aided by a slight positive pressure headspace in the vessel for faster flow. The design allows for easy disassembly and cleaning to prevent cross-contamination between different botanical extractions.

sequenceDiagram
    participant User
    participant Extractor Vessel
    participant Plunger Filter
    participant Lever Mechanism
    participant Collection Flask

    User->>Extractor Vessel: Add Botanical Material & Solvent
    User->>Plunger Filter: Insert Piston Rod (41)
    User->>Plunger Filter: Press Down Plunger (43)
    Plunger Filter->>Extractor Vessel: Separate Solids/Liquid
    User->>Lever Mechanism: Actuate Lever (33)
    Lever Mechanism->>Extractor Vessel: Open Pouring Opening (37)
    Extractor Vessel->>Collection Flask: Dispense Extract
    User->>Lever Mechanism: Release Lever (33)
    Lever Mechanism->>Extractor Vessel: Close Pouring Opening (37)

Derivative 6: IoT-Enabled, Automated Brewing and Dispensing System

Axis: Integration with Emerging Tech (IoT Sensors & Automation)

Enabling Description:
This derivative integrates US8695486 with IoT capabilities for automated brewing and precise dispensing. The "vessel" (2) includes embedded temperature sensors (e.g., NTC thermistors or RTDs) and a liquid level sensor (e.g., ultrasonic or capacitive). The "lid" (3) houses a compact microcontroller (e.g., ESP32) with Wi-Fi/Bluetooth connectivity. The "elongated lever" (33) is driven by a miniature servo motor or linear actuator, controlled by the microcontroller. The "actuating surface" (331) is replaced by a digital interface (e.g., small LCD touchscreen) or is controllable via a smartphone application. The system allows users to remotely monitor brewing parameters (temperature, steep time), receive notifications (e.g., "brewing complete"), and initiate pouring commands. A precise flow sensor (e.g., turbine or Coriolis meter) can be integrated into the spout (328) to measure dispensed volume. Brewing recipes (e.g., water temperature, steep duration) can be stored and executed automatically. Power is provided by an internal rechargeable battery, with a contact charging base or USB-C port.

flowchart TD
    A[Smartphone App / Voice Command] --> B(IoT Gateway / Cloud)
    B -- Wi-Fi/BLE --> C(Microcontroller in Lid)
    C --> D[Temperature Sensor in Vessel]
    C --> E[Liquid Level Sensor in Vessel]
    C --> F[Servo/Linear Actuator for Lever]
    C --> G[Flow Sensor at Spout]
    H[Actuator (F)] -- Controls --> I[Lever (33)]
    I -- Opens/Closes --> J[Pouring Opening (37)]
    J --> K[Spout (328)]
    K -- Liquid Flow --> L[Beverage]

Derivative 7: AI-Optimized Brewing with Real-time Parameter Adjustment

Axis: Integration with Emerging Tech (AI-driven Optimization)

Enabling Description:
Building upon Derivative 6, this system incorporates AI for real-time optimization of brewing parameters. The microcontroller in the lid (C) connects to a cloud-based AI module or runs a localized lightweight machine learning model. Sensors include high-resolution temperature probes (e.g., for precise temperature profiling), a pH sensor, and an optical turbidity sensor within the vessel interior (23) to monitor extraction progress. The user provides input via a smartphone app regarding coffee bean origin, roast level, grind size, or tea type, along with desired beverage strength and flavor profile. The AI model, trained on extensive brewing data, calculates and adjusts optimal steep time, target water temperature, and even a dynamic "plunging pressure profile" if the piston (4) mechanism were also motorized. The system offers an automated, precision-controlled lever (33) actuated by a stepper motor or high-resolution servo. The AI provides real-time feedback on brewing status and suggests adjustments. Data from past brews is continually fed back to the AI for iterative improvement. The pouring mechanism's lever actuation can be fine-tuned by the AI for optimal flow rate based on beverage viscosity and user preference.

graph LR
    A[User Input: Bean/Tea Type, Desired Profile] --> B(Smartphone App)
    B --> C(Cloud AI / Local ML Model)
    C -- Brewing Parameters --> D(Lid Microcontroller)
    D --> E[Temp, pH, Turbidity Sensors]
    E -- Real-time Data --> C
    D -- Controls --> F[Precision Lever Actuator]
    F -- Opens/Closes --> G[Pouring Opening]
    H[Past Brewing Data] --> C
    C -- Feedback/Adjustments --> D

Derivative 8: Safety-First "Travel Mode" with Friction-Latching Lever

Axis: The "Inverse" or Failure Mode (Low-Power/Limited Functionality)

Enabling Description:
This derivative describes a "travel mode" or "low-power" variant of the plunger-filter beverage maker focused on durability, simplicity, and spill prevention during transport, rather than elaborate features. The "elongated lever" (33) is designed without a dedicated compression spring (34). Instead, the "closure body" (36) is formed with a slightly oversized or conical elastomeric (e.g., high-friction silicone) sealing surface that creates a tight interference fit or high static friction when seated in the "pouring opening" (37). The "horizontal axis" for pivoting the lever (33) is achieved through a robust, high-friction pivot pin or a snap-fit hinge made of a durable, self-lubricating polymer (e.g., acetal). The "actuating region" (331) might be a simple textured thumb rest. To open, the user applies direct, firm downward pressure on the actuating region to overcome the friction seal. To close, the user pushes the lever down until the friction seal engages. This design eliminates complex spring mechanisms, reducing part count, cost, and potential points of failure, making it ideal for portable or ruggedized applications where power or intricate components are undesirable. The lever could also incorporate a simple, manual sliding latch for additional security during transit.

stateDiagram
    [*] --> Closed_FrictionLocked: Default State
    Closed_FrictionLocked --> User_Presses_Actuator: User applies pressure
    User_Presses_Actuator --> Pouring_Opening_Open: Friction overcome, Pouring Open
    Pouring_Opening_Open --> User_Releases_Actuator: User releases pressure
    User_Releases_Actuator --> Closed_FrictionLocked: Friction relocks pouring opening
    Pouring_Opening_Open --> Spill_Warning: Accidental Tilt/Drop
    Spill_Warning --> Closed_FrictionLocked: Auto-close mechanism (e.g., weighted lever or secondary latch)

Derivative 9: Overpressure Spill Prevention System for Lever-Actuated Lid

Axis: The "Inverse" or Failure Mode (Safe Failure/Spill Prevention)

Enabling Description:
This derivative enhances the safety of the US8695486 lid by incorporating an automatic spill prevention system that reacts to overpressure or excessive tilt. The "closure body" (36) or its sealing surface is modified to have a slightly concave shape or internal cavity. A pressure sensor is integrated into the lid's top wall (321), communicating with a micro-actuator (e.g., a shape-memory alloy wire or a micro-solenoid) located near the closure body. In the event of an internal overpressure condition (e.g., accidental heating of residual liquid, or an unexpected steam build-up from brewing), the pressure sensor triggers the micro-actuator. The micro-actuator causes the closure body to expand slightly, or a secondary sealing element within it to deploy, increasing the sealing force against the pouring opening (37). Additionally, a tilt sensor (e.g., accelerometer) is embedded in the lid. If the beverage maker is tilted beyond a predetermined safe angle (e.g., 45 degrees), the tilt sensor similarly triggers the micro-actuator or a separate locking pin that mechanically engages the lever (33), preventing it from being pivoted to the open position, or even forcing it closed if already partially open. The lever (33) and its bearing elements (329) are designed to accommodate this additional locking mechanism without hindering normal operation.

flowchart TD
    A[Beverage Maker Vessel (2)] --> B[Lid (3)]
    B --> C[Pouring Opening (37)]
    B --> D[Lever (33)]
    D -- Controls --> E[Closure Body (36)]
    B --> F[Pressure Sensor]
    B --> G[Tilt Sensor]
    F -- Overpressure Detected --> H[Microcontroller / Logic Unit]
    G -- Excessive Tilt Detected --> H
    H -- Actuates --> I[Micro-Actuator (SMA / Solenoid)]
    I -- Enhances Seal / Locks Lever --> E
    subgraph Normal Operation
        D --> E
        E --> C
    end

Combination Prior Art Scenarios

Here are three scenarios where US Patent 8695486 can be combined with existing open-source standards to establish prior art for derivative improvements:

US8695486 + MQTT (Message Queuing Telemetry Transport) Standard for IoT Communication:
- Scenario: A defensive disclosure for an IoT-enabled plunger-filter beverage maker where the status of the pouring opening (open/closed), internal temperature, and plunger position are transmitted to a central home automation system or a user's smartphone using the MQTT protocol. The open-source Mosquitto MQTT broker could be specified as the communication hub. Users could remotely check if the pour spout is closed or receive alerts if it's left open after brewing. Furthermore, the leverage-actuated pouring opening (claims 1, 14) could be triggered remotely via MQTT messages to dispense liquid.
- Obviousness Argument: The integration of well-established, open-source IoT communication protocols like MQTT for remote monitoring and control of domestic appliances, including their existing mechanical features (like a lever-actuated pouring spout), is a routine engineering implementation. The specific application to a plunger-filter coffee maker with a closable pouring opening, as defined in US8695486, would be considered an obvious combination to someone skilled in the art of IoT and appliance design.
US8695486 + Open-Source 3D Printing File Formats (e.g., STL, AMF) for Replacement/Custom Components:
- Scenario: A defensive disclosure outlining the release of design files (in open-source 3D printable formats like STL or AMF) for customizable replacement parts for the lid (3) and lever (33) assembly of the beverage maker. This would include variations for the actuating surface (331), bearing elements (329), and even alternative closure body (36) designs (e.g., with different textures or colors, assuming the sealing material is a separate insert). The open-source CAD software FreeCAD could be specified for design modifications. This enables users to print their own components, potentially with different aesthetic or ergonomic properties, or to replace worn parts.
- Obviousness Argument: Providing design files in commonly used open-source 3D printing formats for replaceable or customizable components of a consumer product, particularly those with simple mechanical linkages like the lever and lid of US8695486, is a straightforward application of widely available additive manufacturing technology and open-source design practices. The enablement of such customization or repair makes incremental design changes to these components obvious.
US8695486 + Open Hardware Standards (e.g., Arduino Microcontroller Platform) for Automated Test Fixtures:
- Scenario: A defensive disclosure detailing an automated test fixture for quality assurance of the lever (33) and pouring opening (37) closure mechanism of US8695486, utilizing an Arduino-based microcontroller (e.g., Arduino Uno) for control. The fixture employs a servo motor to repeatedly actuate the lever (33) and optical sensors to detect the open/closed state of the pouring opening (37). A force sensor measures the actuation force required. The Arduino code, published under an open-source license, would define the test sequence, data logging, and pass/fail criteria. This system automates the testing of the spring-loading (claim 2) and actuation force of the lever mechanism.
- Obviousness Argument: The use of standard open-source microcontroller platforms like Arduino to automate the testing and quality control of mechanical sub-assemblies, such as the lever and closure mechanism described in US8695486, is a common and obvious engineering practice. The combination leverages readily available hardware and software to perform repetitive, measurable tests on an existing patented mechanism.