Plastic stopper

Plastic stopper

  • CN 103,533,977 A
  • Filed: 03/28/2012
  • Published: 01/22/2014
  • Est. Priority Date: 03/28/2011
  • Status: Active Application
First Claim
Patent Images

1. be suitable for the stopper being connected with the plunger rod being used in syringe barrel, described stopper comprises:

  • Main part, limit unlimited rear end, this unlimited rear end is configured to receive described plunger rod, and described main part is manufactured by rigidity or semi-rigid polymeric material, this rigidity or semi-rigid polymeric material have at about 0.01GPa to the elastic modelling quantity in the scope of about 5GPaWherein, during injecting, when described syringe barrel internal fluid pressure increases, there are at least two actions in following action;

    A) flexible top of described main part is in the radial direction to the inwall expansion of described syringe barrel;

    The inwall of the first pressured described syringe barrel in periphery skirt section of b) extending around the excircle of described main part;

    AndC) engaging between the bonding part of described plunger rod and inner periphery setting along described main part force described main part described in the radial direction to the inwall expansion of described syringe barrel.

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