US 11,839,749 B2
Syringe cap, syringe with needle, and prefilled syringe formulation
Rieko Shiozaki, Tokyo (JP); Yuji Yamanaka, Tokyo (JP); Taiji Horita, Osaka (JP); Ippei Matsumoto, Osaka (JP); and Kensuke Taniguchi, Osaka (JP)
Assigned to Taisei Kako Co., Ltd., Osaka (JP); and Chugai Seiyaku Kabushiki Kaisha, Tokyo (JP)
Appl. No. 15/315,460
Filed by Taisei Kako Co., Ltd., Osaka (JP); and Chugai Seiyaku Kabushiki Kaisha, Tokyo (JP)
PCT Filed Jun. 4, 2015, PCT No. PCT/JP2015/066209
§ 371(c)(1), (2) Date Dec. 1, 2016,
PCT Pub. No. WO2015/186792, PCT Pub. Date Dec. 10, 2015.
Claims priority of application No. 2014-115936 (JP), filed on Jun. 4, 2014.
Prior Publication US 2017/0197039 A1, Jul. 13, 2017
Int. Cl. A61M 5/32 (2006.01)
CPC A61M 5/3202 (2013.01) [A61M 5/3213 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A syringe cap comprising:
a cylindrical cap body into which a needle is inserted from a proximal end toward a distal end and is detachably attached to a syringe body to which the needle is attached; and
a plurality of projections projecting from an outer circumferential surface of the cylindrical cap body and extending around a circumference of the cylindrical cap body, wherein
the cylindrical cap body comprises:
a distal end side region formed on a distal end side of the cylindrical cap body; and
a central region located at a position between a proximal end side of the cylindrical cap body and the distal end side region,
wherein the distal end side region has a tapered shape with an outer diameter that decreases as being away from the central region in an extending direction of an axis of the cylindrical cap body
each of the plurality of projections comprises:
an apex located radially outward of the cylindrical cap body from the outer circumferential surface of the cylindrical cap body;
a first inclined surface having a starting end located at the apex and having a terminal end located at a position on a side closer to the proximal end side of the cylindrical cap body than the starting end is, on the outer circumferential surface of the cylindrical cap body; and
a second inclined surface having a starting end located at the apex and having a terminal end located at a position on a side closer to the distal end side of the cylindrical cap body than the starting end is, on the outer circumferential surface of the cylindrical cap body,
a shortest distance from the starting end to the terminal end of the first inclined surface is smaller than a shortest distance from the starting end to the terminal end of the second inclined surface, and
the plurality of projections comprise:
at least one projection arranged in the central region of the outer circumferential surface of the cylindrical cap body; and
one projection arranged at the distal end of the cylindrical cap body in the distal end side region, wherein
each of the plurality of projections has a height that is a distance from a position corresponding to the terminal end of the first inclined surface to the apex on a centerline extending perpendicularly to the axis of the cylindrical cap body passing through the apex, and
the height of the one projection arranged in the distal end side region is higher than the height of the at least one projection arranged in the central region
the plurality of projections further comprise one projection arranged in a proximal end side region from the central region,
wherein a height of the one projection arranged in the proximal end side region from the central region is higher than a height of the at least one projection arranged in the central region.