Dual-Plunger Syringe Assembly for Administering Multiple Fluids
Summary
The USPTO published patent application US20260091171A1 for a dual-plunger syringe assembly that enables administration of multiple fluids through a single device. Inventor Abraham C. Ng filed the application (No. 18902936) on October 1, 2024. The design embeds a second plunger within a first plunger, allowing sequential or simultaneous delivery of two distinct fluids.
What changed
The patent application describes a syringe assembly with a barrel containing a first fluid chamber and a distal tip, a first plunger with a stopper for driving the first fluid, and a second plunger positioned within the first plunger containing a second fluid chamber. CPC classifications A61M 5/16827 (fluid administration systems) and A61M 5/31511 (plungers/barrels for syringes) indicate the technical scope. The dual-plunger architecture allows independent delivery of two fluids through a single injection site.
This is a published patent application seeking intellectual property protection; it does not impose regulatory compliance obligations on manufacturers or healthcare providers. Entities developing multi-fluid drug delivery systems may wish to review this filing to assess potential freedom-to-operate considerations. The patent does not establish mandatory requirements or compliance deadlines.
Archived snapshot
Apr 2, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
Syringe Assembly For Administering Multiple Fluids
Application US20260091171A1 Kind: A1 Apr 02, 2026
Inventors
Abraham C. Ng
Abstract
A framework for administering multiple fluids using a single syringe assembly. The syringe assembly includes a barrel and first and second plungers. The barrel includes a first inside surface defining a first fluid chamber for retaining a first fluid and a distal tip defining a first passageway in fluid communication with the first fluid chamber. The first plunger includes a first stopper and a second inside surface defining a second fluid chamber for retaining a second fluid, wherein the first stopper is slidably positioned in fluid-tight engagement with the first inside surface of the barrel for driving the first fluid from the first fluid chamber though the first passageway. The second plunger includes a second stopper that is slidably positioned in fluid tight engagement with the second inside surface of the first plunger for driving the second fluid from the second fluid chamber.
CPC Classifications
A61M 5/16827 A61M 5/31511
Filing Date
2024-10-01
Application No.
18902936
Named provisions
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