Published Technical Disclosure Archive

Enhanced Device for Attachment to an Injection Device

Publication ID: 24-11857708_0006_PTD
Published: October 28, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced Device for Attachment to an Injection Device,” Published Technical Disclosure No. 24-11857708_0006_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857708_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. 11,857,708.

Summary of the Inventive Concept

An innovative supplementary device for injection devices that improves safety, efficiency, and user experience by enhancing dosage selection and injection triggering.

Background and Problem Solved

The original patent disclosed a device for attachment to an injection device, which, although functional, had limitations in terms of user safety and injection efficiency. The new inventive concept addresses these limitations by introducing a more robust mechanical coupling, a spring-loaded dial knob, and an enhanced dosage detection system, ensuring accurate and reliable injection delivery.

Detailed Description of the Inventive Concept

The supplementary device comprises a carrier interface, a dial knob, and a mechanical coupling that transfers a compressive force to a release button of the injection device upon selection of a dosage. The mechanical coupling is configured to detect a selected dosage and trigger an injection. A spring is incorporated to force the dial knob into an initial position, ensuring no compressive force is exerted on the release button when not in use. The device can be attached to various injection devices, enhancing their overall performance and safety.

Novelty and Inventive Step

The new inventive concept introduces a more efficient and safe mechanical coupling, a spring-loaded dial knob, and an enhanced dosage detection system, which are not obvious from the original patent. The inventive step lies in the combination of these features, which provide a more reliable and user-friendly injection experience.

Alternative Embodiments and Variations

Alternative embodiments of the supplementary device could include different mechanical coupling designs, such as a gear-based system or a hydraulic system, to achieve the same functionality. Additionally, the device could be adapted for use with various types of injection devices, such as insulin pumps or auto-injectors.

Potential Commercial Applications and Market

The enhanced supplementary device has significant commercial potential in the pharmaceutical and medical device industries, particularly in the areas of diabetes management, emergency medicine, and patient self-administration of injectable medications.

CPC Classifications

SectionClassGroup
A A61 A61M5/3155
A A61 A61M5/2033
A A61 A61M2005/3126
A A61 A61M2205/332
A A61 A61M2205/3327
A A61 A61M2205/3584
A A61 A61M2205/52
A A61 A61M2205/8206

Field of Art

Medical device technology, specifically supplementary devices for injection systems, focusing on mechanical interfaces for dosage selection and injection triggering in drug delivery devices

Person of Ordinary Skill (PHOSITA) Profile

A biomedical engineer with expertise in medical device design, mechanical coupling systems, and injection device mechanisms, holding a bachelor's or master's degree with 3-5 years of experience in medical device development

Obviousness Rationale

A person having ordinary skill in the art would recognize that the published technical disclosure represents predictable variations of the source patent's core mechanical coupling and dosage selection mechanism. The PTD's alternative embodiments and mechanical coupling designs are logical extensions of the existing patent's core technical principles. The modifications represent standard engineering design choices that would be apparent to a skilled practitioner seeking to improve injection device supplementary systems.

Obvious Combinations & Variations

Source Patent Element
Mechanical coupling configured to transfer compressive force to a release button of a drug delivery device
PTD Variation
Alternative mechanical coupling designs including gear-based or hydraulic systems to achieve identical force transfer functionality
Obviousness Reasoning
A PHOSITA would recognize multiple equivalent mechanical transfer mechanisms as predictable design variations within standard engineering problem-solving approaches
Source Patent Element
Spring mechanism for forcing dial knob into initial position
PTD Variation
Spring shaped to exert force on a sensor during torque transfer, expanding the spring's functional role beyond initial positioning
Obviousness Reasoning
Modifying a known spring mechanism to serve multiple functions represents a routine engineering optimization that would be obvious to a skilled practitioner
Source Patent Element
Carrier interface for mechanically coupling supplementary device to dosage selector
PTD Variation
Enhanced carrier interface configured to detect selected dosage and provide additional safety monitoring
Obviousness Reasoning
Integrating sensing and monitoring capabilities into an existing mechanical interface represents a predictable technological enhancement within medical device design
Source Patent Element
Dosage selection mechanism for injection devices
PTD Variation
System for automatic dosage selection with integrated mechanical coupling and injection triggering
Obviousness Reasoning
Combining known dosage selection techniques with automated triggering represents an incremental improvement that would be obvious to a PHOSITA seeking to enhance device usability
Source Patent Element
Supplementary device attached to injection device
PTD Variation
Adaptable supplementary device compatible with multiple injection device types including insulin pumps and auto-injectors
Obviousness Reasoning
Designing a universal supplementary device interface represents a standard engineering approach to increasing product versatility and market applicability
35 U.S.C. § 103 Summary: Pursuant to 35 U.S.C. ยง 103, the variations disclosed in this published technical disclosure would have been obvious to a person having ordinary skill in the art at the time of invention, with reasonable expectation of success, based on the teachings of US Patent 11857708. The disclosed mechanical coupling, dosage selection, and injection triggering mechanisms represent predictable technological variations that do not rise to the level of non-obvious innovation.

Original Patent Information

Patent NumberUS 11,857,708
TitleDevice for attachment to an injection device
Assignee(s)Sanofi