POSITIVE DISPLACEMENT STOPPER FOR PRE-FILLED SYRINGE

PROBLEM TO BE SOLVED: To effectively and consistently reduce and/or eliminate reflux of fluid back into a syringe upon this release of pressure on a plunger rod when positive displacement of fluids from the syringe (for example, into any inserted catheter) after a stopper has been bottomed in a syri...

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Bibliographic Details
Main Authors SCHILLER ERIC, ECONOMOU ANTHONY, TORRES JOHANNA, MICHAEL QUINN, GUAN E, JU GANG
Format Patent
LanguageEnglish
Published 04.07.2013
Subjects
DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
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Summary:PROBLEM TO BE SOLVED: To effectively and consistently reduce and/or eliminate reflux of fluid back into a syringe upon this release of pressure on a plunger rod when positive displacement of fluids from the syringe (for example, into any inserted catheter) after a stopper has been bottomed in a syringe barrel and force is released from the plunger rod.SOLUTION: A stopper (12) adapted for attachment with a plunger rod (14) for use within a syringe barrel (16) is disclosed. The stopper includes a body (26) defining an open rearward end (28) and a closed front end (30). The open rearward end is adapted to receive a front forward end attachment portion (31) of the plunger rod. The stopper also includes a core member (32) integrally formed with the body adjacent to the closed front end. The core member includes a nose portion (34) having a profile adapted to create a positive seal with an outlet opening of the syringe barrel.
Bibliography:Application Number: JP20130076220