US 12,109,396 B2
Dual-chamber syringe with dual-lumen intravenous set
George Mansour, Diamond Bar, CA (US); Eugene Mason, La Habra Heights, CA (US); Ryan Callahan, Long Beach, CA (US); Todd Oda, Torrance, CA (US); Wesley Underwood, La Habra, CA (US); Adel Shams, Brea, CA (US); Dylan Beyhl, Scottsdale, AZ (US); and Seyed Salehi Borojerdi, Aliso Viejo, CA (US)
Assigned to CareFusion 303, Inc., San Diego, CA (US)
Filed by CareFusion 303, Inc., San Diego, CA (US)
Filed on Jun. 21, 2022, as Appl. No. 17/845,392.
Application 17/845,392 is a continuation of application No. 16/598,945, filed on Oct. 10, 2019, granted, now 11,395,879.
Claims priority of provisional application 62/744,500, filed on Oct. 11, 2018.
Prior Publication US 2022/0323677 A1, Oct. 13, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/19 (2006.01); A61M 5/28 (2006.01); A61M 5/178 (2006.01); A61M 5/31 (2006.01)
CPC A61M 5/19 (2013.01) [A61M 5/284 (2013.01); A61M 2005/1787 (2013.01); A61M 2005/3132 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A dual-chamber syringe, comprising:
an end wall comprising a channel;
a primary plunger comprising a primary stopper, the primary stopper forming a primary chamber with the end wall;
a secondary plunger in mechanical association with the primary plunger, the secondary plunger comprising a secondary stopper, the secondary stopper forming a secondary chamber with the primary stopper;
a primary nozzle extending from the end wall, the primary nozzle in fluid communication with the primary chamber;
a secondary nozzle extending from the end wall, the secondary nozzle in fluid communication with the secondary chamber; and
an O-ring configured to isolate the primary nozzle from the secondary chamber in a pre-flushing state and to permit fluid communication between the secondary chamber and the primary nozzle via the channel in a post-flushing state.