(19)
(11)EP 3 753 593 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
24.03.2021 Bulletin 2021/12

(43)Date of publication A2:
23.12.2020 Bulletin 2020/52

(21)Application number: 20171265.0

(22)Date of filing:  28.03.2012
(51)International Patent Classification (IPC): 
A61M 5/315(2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 28.03.2011 US 201161468304 P

(62)Application number of the earlier application in accordance with Art. 76 EPC:
12713537.4 / 2691132

(71)Applicant: Becton, Dickinson and Company
Franklin Lakes, NJ 07417-1880 (US)

(72)Inventors:
  • IVOSEVIC, Milan
    Kinnelon, New Jersey 07405 (US)
  • YEMANE TEKESTE, Girum
    Hackensack, New Jersey 07601 (US)
  • WONG, Andrew
    Morristown, New Jersey 07960 (US)
  • QUINN, Michael, Vincent
    East Hanover, New Jersey 07936 (US)
  • BARANSKI, Andrzej
    Catham, New Jersey 07928 (US)

(74)Representative: dompatent von Kreisler Selting Werner - Partnerschaft von Patent- und Rechtsanwälten mbB 
Deichmannhaus am Dom Bahnhofsvorplatz 1
50667 Köln
50667 Köln (DE)

  


(54)PLASTIC STOPPER


(57) A stopper includes a main body portion defining an open rearward end configured to receive the plunger rod, an engagement portion provided along an inner circumference of the main body portion configured to engage at least a top portion of the plunger rod, a closed front end forming a flexible roof, and a first perimetrical skirt extending around an outer circumference of the main body portion toward the closed front end of the main body portion. When fluid pressure is increased inside the syringe barrel during an injection, the flexible roof expands in a radial direction toward an inner wall of the syringe barrel, the first perimetrical skirt is forced against the inner wall of the syringe barrel, and an engagement between the plunger rod and the engagement portion forces the main body portion to expand in the radial direction toward the inner wall of the syringe barrel.







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