US 9,039,664 B2Granted

Elastic seal member for prefilled syringe

AssigneeTaisei Kako Co., Ltd.

InventorsYukihiro Ogawa, Yasuyuki Shiraishi, Taiji Horita, Ichiro Suzuki

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Abstract

In a prefilled syringe including an elastic seal member to be pierced with a needle for use to eject a protein pharmaceutical preparation therefrom, the elastic seal member ensures smooth and reliable piercing thereof with the needle while reliably preventing an active substance of the protein pharmaceutical preparation from being adsorbed thereon. When a protective film (3) is laminated to a top surface of a seal body (2) of an elastic material, the protective film (3) is stretched to a greater extent by a recess (4) provided in the top surface. Further, the piercing portion to be pierced with the needle is provided in a bottom of the recess (4). Thus, the protective film (3) is formed as locally having a smaller thickness in the piercing portion.

Claims5

Dependent claims

An elastic seal member for a prefilled syringe including a drug containing portion filled with a content liquid, the elastic seal member being adapted to seal the drug containing portion and having a piercing portion to be pierced with a needle for use, the elastic seal member comprising:

a seal body of an elastic material;
and
a protective film laminated to at least a surface portion of the seal body opposed to the drug containing portion,
wherein the protective film has a relaxed state wherein the protective film has a first thickness,
wherein the protective film has an applied state with the protective film laminated to the surface portion of the seal body,
wherein in the applied state, the protective film is changed from the relaxed state by being locally stretched more in the piercing portion than around the piercing portion as a result of which the laminated protective film is locally changed from the first thickness and has a locally smaller thickness in the piercing portion than around the piercing portion.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/112,092Filed 16 Apr 2012
Priority: JP 2011-09783526 Apr 2011
Published: US 2014/0066859 A16 Mar 2014
Granted: 26 May 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

A61M 5/2466
With sealing means to be broken or opened: by piercing without internal pressure increase
A61M 5/315
Details: pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ;…
A61M 5/31511
Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing…:…
A61M 5/2429
Using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule: by telescoping of ampoules…

Family

US 2014/0066859 A1Pre-grant publication · published 6 Mar 2014
US 9,039,664 B2This patent

From the US filing history. Foreign family members aren’t listed.

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