# US 10,369,295 B2 · Syringe assembly, cap, and puncture needle

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- Number: US 10,369,295 B2
- Document ID: US10369295B2
- Status: Granted
- Kind: B2
- Application number: 15/470,835
- Filed: 2017-03-27
- Published: 2017-07-13
- Granted: 2019-08-06
- Earliest claimed: 2014-10-01
- Assignees: Terumo Kabushiki Kaisha
- Applicants: Terumo Kabushiki Kaisha
- Inventors: Kaori Funatsu; Yoshihiko Abe; Ruriko Iibuchi
- Web page: https://patentgrep.com/patent/US10369295B2

## CPC

- A61M 5/3202: {Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; protectors for sharps A61B50/3001)}
- A61M 5/28: Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
- A61M 5/285: {with sealing means to be broken or opened}
- A61M 5/32: Needles; Details of needles pertaining to their connection with syringe or hub (infusion needles A61M5/158); Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M 5/343: {Connection of needle cannula to needle hub, or directly to syringe nozzle without a needle hub (A61M5/322 takes precedence)}
- A61M 2005/3107: {for needles}
- A61M 2005/3109: {Caps sealing the needle bore by use of, e.g. air-hardening adhesive, elastomer or epoxy resin}
- A61M 2005/311: {Plugs, i.e. sealing rods or stylets closing the bore of needles}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A syringe assembly includes a barrel having a barrel tip portion, a puncture needle projecting from the barrel tip portion, and a cap that is detachably mountable to the barrel so as to seal a distal end of a needle hole. The cap has a receiving hole that receives the puncture needle, a bottom wall portion into which the puncture needle is inserted, and a stopper portion that defines an insertion length of the puncture needle relative to the bottom wall portion. In a state in which the cap is mounted to the barrel, the length from the most proximal position of a contact region between the cap and the puncture needle to the most proximal position of an edge surface is 1 to 3 mm.

## Claims

### Claim 1

A syringe assembly comprising:
a barrel comprising:
a cylindrical barrel body that includes an opening at a proximal end thereof, and
a barrel tip portion that is disposed at a distal end of the barrel body;
a puncture needle that includes an edge surface and a needle hole, and being held by the barrel tip portion so as to project from the barrel tip portion; and
a cap that is detachably mountable to the barrel so as to seal a distal end of the needle hole;
wherein the cap includes:
a receiving hole configured to receive the puncture needle,
a bottom wall portion that is disposed adjacent to a distal end side of the receiving hole and into which the puncture needle is insertable, wherein the bottom wall portion has a Shore D hardness in range of 35 to 55, and
a stopper portion that defines an insertion length of the puncture needle relative to the bottom wall portion by abutting against the barrel;
wherein, in a state in which the cap is mounted to the barrel, a length from a most proximal position of a contact region between the cap and the puncture needle to a most proximal position of the edge surface is in a range of 1 to 3 mm; and
wherein the puncture needle comprises:
a first lubricant-covered region at which an outer surface of the puncture needle is covered by a lubricant, the first lubricant-covered region extending from a most distal position of the puncture needle to a position in a range of 1 to 3 mm from the most proximal position of the edge surface,
a second lubricant-covered region at which the outer surface of the puncture needle is covered by the lubricant, the second lubricant-covered region being adjacent to a proximal end of the first lubricant-covered region, and
a non-lubricant-covered region at which the outer surface of the puncture needle is not covered by the lubricant, the non-lubricant-covered region being adjacent to a proximal end of the second lubricant-covered region,
wherein a thickness of the lubricant in the first lubricant-covered region is lower than a thickness of the lubricant in the second lubricant-covered region.

### Claim 2 (depends on 1)

The syringe assembly according to claim 1, wherein a length of the edge surface along an axial direction of the puncture needle is in a range of 1 to 4 mm.