US Patent No. 10,363,371

MEDICAL SYRINGE, GASKET TO BE USED FOR SYRINGE, AND GASKET PRODUCTION METHOD


Patent No. 10,363,371
Issue Date July 30, 2019
Title Medical Syringe, Gasket To Be Used For Syringe, And Gasket Production Method
Inventorship Hiroaki Nakano, Kobe (JP)
Yuki Sakashita, Kobe (JP)
Yoshikazu Masuyama, Kobe (JP)
Assignee SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo (JP)

Claim of US Patent No. 10,363,371

1. A gasket to be used for a medical syringe, the gasket comprising:a main body made of an elastic material; and
a film provided on a surface of the main body;
the gasket having a circumferential surface portion to be brought into contact with an inner peripheral surface of a syringe barrel of the syringe;
wherein said circumferential surface portion has a predetermined and fixed diameter along the gasket longitudinal direction, and has at least one projection provided thereon which projects circumferentially from a surface portion of the film, wherein said at least one projection has a height of not less than 15 ?m and not greater than 55 ?m and has a width of not less than 30 ?m and not greater than 75 ?m.