US 10,131,472 B2Granted

Vial rubber stopper

AssigneeNipro Corporation

InventorsTakashi Asai, Tadatoshi Uchida, Masanobu Iwasa, Ryouji Komatsu

Life of this patent

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Abstract

Provided is a vial rubber stopper using multiple types of rubber to prevent the vial rubber stopper from being scraped and from sticking to a presser plate. The vial rubber stopper includes: a cap portion having a flange; a piercing area formed to have a recess at a top surface of the cap portion and configured to traverse longitudinally the cap portion in an axial direction from the recess to a bottom surface of the cap portion; and a leg portion formed on the bottom surface of the cap portion in a way of extending downward and located outside the piercing area with respect to an axial center of the cap portion. The piercing area is formed of rubber having rubber hardness from 20 to 35, and the top surface other than the recess of the cap portion is formed of rubber having rubber hardness from 58 to 90.

Claims6

Dependent claims

A vial rubber stopper comprising:

a cap portion having a top surface with at least one opening, a bottom surface and a flange;
at least one piercing portion recessed downwardly from the top surface of the cap portion to form a recess, said recess having a sidewall inwardly tapered from the top surface of the cap portion toward a central axis of the at least one piercing portion, the at least one piercing portion being configured to traverse said cap portion from the at least one opening to the bottom surface of the cap portion in an axial direction along a central axis of the cap portion;
and
a leg portion extending downward from the bottom surface of the cap portion and having a recess wider than the top surface of the at least one piercing portion,
wherein the top surface of the cap portion is formed of rubber having a Type A rubber hardness from 58 to 90,
wherein the at least one piercing portion, the bottom surface of the cap portion and the leg portion are formed of rubber having a Type A rubber hardness from 20 to 35,
wherein the cap portion, the at least one piercing portion and the leg portion are unitarily formed as one piece, and
wherein the flange of the cap portion is the entire portion, which extends out of an outer diameter of the leg portion, of the cap portion, and includes a first portion made of the rubber having the Type A rubber hardness from 58 to 90 and a second portion made of the rubber having the Type A rubber hardness from 20-35.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/997,513Filed 28 Dec 2010
Published: US 2013/0270271 A117 Oct 2013
Granted: 20 Nov 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B65D 39/0052
Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers: made in more than one piece
A61J 1/1406
Details; Accessories therefor: septums, pierceable membranes
B65D 39/007
Made in more than one piece: plastic cap-shaped hollow plugs
B65D 51/002
Closures not otherwise provided for: closures to be pierced by an extracting-device for the contents and fixed on the container by separate…