SEALING ARRANGEMENT FOR SYRINGE AND METHOD

A multi-piece plunger configured to be slideably advanced through a syringe barrel to expel fluid therefrom is provided. The plunger includes a head portion having a proximal end, a distal end, and an annular sidewall extending therebetween. The sidewall can define at least two annular grooves. The...

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Bibliographische Detailangaben
Hauptverfasser:	COJOCARIU, Gheorghe, RYAN, Kevin, M
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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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Beschreibung
Zusammenfassung:	A multi-piece plunger configured to be slideably advanced through a syringe barrel to expel fluid therefrom is provided. The plunger includes a head portion having a proximal end, a distal end, and an annular sidewall extending therebetween. The sidewall can define at least two annular grooves. The plunger also includes annular seals disposed within each of the at least two annular grooves, such that at least a portion of each of the annular seals protrudes radially beyond an outer surface of the sidewall to form a slideable seal with an inner sidewall of the syringe barrel. The head portion can be formed from a first material, such as a rigid plastic material, and the annular seals can be formed from a second material, such as a thermoset rubber or a thermoplastic elastomer. A prefilled syringe including the multi-piece plunger is also provided herein.