# Precise Medicine Delivery Device with Priming Control > This patent describes a device for accurately measuring and delivering liquid medicine, using a special mechanism to control how a plunger moves during both initial setup and actual delivery. - **Patent:** US 12734300 - **Original title:** Devices and methods for precision dose delivery - **Granted:** 2026 - **Status:** Active - **Times cited:** 0 - **Field:** pharmaceutical, medical_devices, biotech, consumer_electronics ## What it does This device is designed to deliver a specific amount of liquid medicine or other fluid with high accuracy. It includes a main body that holds the liquid, and a plunger rod that pushes a stopper inside the body. The key feature is a special component that precisely controls the forward movement (distal movement) of the plunger rod. This control happens during two distinct phases: a 'priming step' to prepare the device, and a 'subsequent delivery step' to dispense the medicine. This two-step regulation ensures that the device is accurately prepared and then delivers the exact predetermined volume. For example, an insulin pen could use this technology to ensure each dose is consistently accurate, reducing the risk of under- or over-dosing. ## What it does NOT cover - Does not cover devices that deliver medicine as a continuous drip without distinct priming and delivery steps controlled by a plunger. - Does not cover devices where the dose is determined by factors other than the controlled distal movement of a plunger rod pushing a stopper. - Does not cover devices that lack a specific component designed to regulate the plunger rod's movement during both a priming step and a delivery step. - Does not cover drug delivery systems that rely on gravity, pumps, or other mechanisms without a physical plunger rod and stopper for dispensing. - Does not cover devices where the 'predetermined volume' is not achieved through the precise regulation of plunger rod movement. ## The clever bit The clever part is the component that regulates the plunger rod's movement during both the initial 'priming step' and the 'delivery step.' This dual-stage regulation ensures accuracy from the very beginning, preventing issues like air bubbles or incomplete initial fills from affecting the final dispensed dose, which was a common challenge in earlier designs. ## Real-world examples 1. Insulin pens 2. Growth hormone pens 3. Self-injection devices for biologics 4. Auto-injectors for emergency medications 5. Syringe pumps with precise volume control ## Why it matters Accurate drug delivery is crucial in many medical treatments, especially for conditions like diabetes where precise insulin doses are vital. Errors in dosage can lead to serious health complications. This technology aims to improve patient safety and treatment effectiveness by ensuring consistent and exact delivery of medication, which can reduce the burden on healthcare providers and patients. ## Frequently asked questions ### What does Precise Medicine Delivery Device with Priming Control cover? This patent describes a device for accurately measuring and delivering liquid medicine, using a special mechanism to control how a plunger moves during both initial setup and actual delivery. ### When does this patent expire? This patent is expected to expire on September 15, 2046, when the invention enters the public domain. ### What problem does this patent solve? Accurate drug delivery is crucial in many medical treatments, especially for conditions like diabetes where precise insulin doses are vital. Errors in dosage can lead to serious health complications. This technology aims to improve patient safety and treatment effectiveness by ensuring consistent and exact delivery of medication, which can reduce the burden on healthcare providers and patients. ### What does this patent NOT cover? Does not cover devices that deliver medicine as a continuous drip without distinct priming and delivery steps controlled by a plunger. **Full plain-English explainer:** https://patentbrief.org/patent/us/12734300/devices-and-methods-for-precision-dose-delivery **Original patent:** https://patents.google.com/patent/US12734300 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [How Auto-Injectors Adjust Their Dose Using a Simple Spacer](https://patentbrief.org/patent/us/4031893/epipen-autoinjector-kaplan) — A 1977 invention for auto-injectors that uses a physical spacer to adjust the amount of medicine inside the device before it is fired. - [Device for Collecting and Separating Bodily Fluids Using Pressure](https://patentbrief.org/patent/us/12733848/fluid-control-devices-and-methods-of-using-the-same-12733848) — This patent describes a device that uses different levels of negative pressure to first isolate a portion of bodily fluid and then collect a separate sample from a fluid source. - [How Suction Controls Fluid Collection for Medical Tests](https://patentbrief.org/patent/us/12733849/fluid-control-devices-and-methods-of-using-the-same) — This patent describes a device that uses different levels of suction to precisely control and separate bodily fluids, like blood, for collection and analysis. - [Tiny Epinephrine Particles for Fast-Dissolving Under-Tongue Tablets](https://patentbrief.org/patent/us/12734138/epinephrine-fine-particles-and-methods-for-use-thereof) — This patent describes new compositions of extremely small epinephrine particles designed for fast-dissolving tablets that are absorbed under the tongue, aiming to treat severe allergic reactions or cardiac events more effectively with a lower dose. - [Making Antibody Drug Conjugate Medicines Consistent Across Batches](https://patentbrief.org/patent/us/20230364252/methods-for-formulating-antibody-drug-conjugate-compositions) — This patent describes methods for precisely controlling the drug amount in antibody drug conjugate (ADC) medicines, ensuring each batch has a consistent strength and effect.