The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2018
Filed:
Sep. 12, 2014
Applicant:
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Inventors:
Naoyuki Ishida, Kobe, JP;
Kazuhiro Fujisawa, Kobe, JP;
Assignee:
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M 5/31 (2006.01); A61M 5/315 (2006.01);
U.S. Cl.
CPC ...
A61M 5/31513 (2013.01); A61M 5/3129 (2013.01); A61M 2005/3101 (2013.01); A61M 2005/3131 (2013.01);
Abstract
The present invention provides a gasket for prefilled syringes having both airtightness and operability. The present invention relates to a gasket for prefilled syringes, the gasket including a plurality of circular ribs that are to be in sliding contact with the inner wall of a syringe, the gasket being laminated with an inert film, the plurality of circular ribs including a front circular rib having a front corner with a radius of curvature Rand a rear corner with a radius of curvature R, a ratio of the radius of curvature Rto the radius of curvature Rbeing more than 1.