US 11,998,723 B2
Vented syringe
Raymond Feith, San Diego, CA (US); Christopher Zollinger, San Diego, CA (US); George Mansour, Diamond Bar, CA (US); Edmond Yu, Chino Hills, CA (US); Tomas Frausto, San Diego, CA (US); and Ryan Callahan, Long Beach, CA (US)
Assigned to Becton, Dickinson & Company, San Diego, CA (US)
Filed by Becton, Dickinson and Company, San Diego, CA (US)
Filed on Feb. 26, 2019, as Appl. No. 16/286,382.
Prior Publication US 2020/0268976 A1, Aug. 27, 2020
Int. Cl. A61M 5/31 (2006.01); A61J 1/20 (2006.01); A61M 5/178 (2006.01); A61M 5/32 (2006.01)
CPC A61M 5/3148 (2013.01) [A61J 1/2096 (2013.01); A61M 5/1782 (2013.01); A61M 5/3221 (2013.01); A61J 1/2068 (2015.05); A61M 2005/3123 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A vented syringe, comprising:
a syringe body defining a syringe cavity;
a plunger body disposed at least partially within the syringe cavity, wherein the plunger body extends continuously between a first end and a second end, the plunger body comprising:
an air intake channel defined within the plunger body and extending continuously between the first end and the second end of the continuous plunger body; and
a thumb pad disposed at the first end of the plunger body;
a filter disposed inwardly adjacent to the thumb pad at the first end of the plunger body and in fluid communication with the air intake channel;
a plunger seal disposed at the second end of the plunger body and sealingly engaged with the syringe cavity, wherein the plunger body is stationary relative to the plunger seal; and
a one-way valve disposed at the second end of the plunger body, wherein the one-way valve, the plunger seal, and the syringe cavity cooperatively define a syringe volume within the syringe cavity, the one-way valve is in fluid communication with the air intake channel and the syringe volume, and the one-way valve is configured to prevent fluid flow from the syringe volume to the air intake channel and permit fluid flow from the air intake channel to the syringe volume.