Syringe with Co-Molded Hub and Cannula

• US 20140188053A1
• Filed: 03/07/2014
• Published: 07/03/2014
• Est. Priority Date: 01/15/2008
• Status: Active Grant

• Current Assignee: West Pharmaceutical Services Incorporated
• Original Assignee: West Pharmaceutical Services Incorporated
• Inventors: LUNDQUIST, Jon Tyler
• Granted Patent: US 9,468,726 B2
• Time in Patent Office: Days
• US Class Current: 604/240
• CPC Class Codes: A61M 2005/3109 Caps sealing the needle bore by use of, e.g. air-hardening adhesive, elastomer or epoxy resin
• CPC Class Codes: A61M 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: A61M 5/3286 Needle tip design, e.g. for improved penetration
• CPC Class Codes: A61M 5/3293 characterised by features of the needle hub
• CPC Class Codes: A61M 5/343 Connection of needle cannula to needle hub, or directly to syringe nozzle without a needle hub A61M5/322 takes precedence
• CPC Class Codes: B29C 2045/14139 positioning inserts having a part extending into a positioning cavity outside the mould cavity
• CPC Class Codes: B29C 45/14065 Positioning or centering articles in the mould
• CPC Class Codes: B29C 45/14311 using means for bonding the coating to the articles B29C45/14795 takes precedence
• CPC Class Codes: B29C 45/14426 Coating the end of wire-like or rod-like or cable-like or blade-like or belt-like articles
• CPC Class Codes: B29L 2031/7544 Injection needles, syringes

Abstract

A prefilled syringe for injecting medicament into a patient includes a barrel constructed of a polymeric material, a cannula and a hub. The barrel has a diameter, a longitudinal axis, a proximal end and a distal end. The cannula has a proximal end and a tip opposite the proximal end. The proximal end of the cannula is fixed to the distal end of the barrel. The cannula is positioned generally coaxially with the longitudinal axis. The hub is integrally formed with the distal end. The hub includes a rib section and a cap. The rib section has a generally cruciform cross-section taken along a rib plane. The rib plane is generally perpendicular to the longitudinal axis. The cap has a generally U-shaped cross-section taken along a longitudinal plane. The longitudinal plane is generally parallel to the longitudinal axis.

Claims

1. A prefilled syringe for injecting medicament into a patient, the syringe comprising:

a barrel constructed of a polymeric material, the barrel including a diameter, a longitudinal axis, a proximal end and a distal end;

a cannula having a proximal end and a tip opposite the proximal end, the proximal end fixed to the distal end of the barrel, the cannula positioned generally coaxially with the longitudinal axis; and

a hub integrally formed with the distal end, the hub including a rib section and a cap, the rib section having a generally cruciform cross-section taken along a rib plane, the rib plane being generally perpendicular to the longitudinal axis, the cap having a generally U-shaped cross-section taken along a longitudinal plane, the longitudinal plane being generally parallel to the longitudinal axis.

2. The prefilled syringe of claim 1 wherein the barrel and hub are constructed of one of a transparent cyclic olefin copolymer and a transparent cyclic olefin polymer.

3. The prefilled syringe of claim 1 wherein the cannula has a gauge of twenty-seven to thirty-three (27-33).

4. The prefilled syringe of claim 1 wherein the rib section includes a first pair of ribs and a second pair of ribs, the first pair of ribs includes a first rectangular rib and a second rectangular rib, the first rectangular rib positioned on an opposite side of the longitudinal axis relative to the second longitudinal rib, the second pair of ribs includes a first T-shaped rib and a second T-shaped rib, the first T-shaped rib positioned on an opposite side of the longitudinal axis relative to the second T-shaped rib.

5. The prefilled syringe of claim 4 wherein the first rectangular rib has a first radius and the second rectangular rib has a second radius, the first radius being generally equal to the second radius.

6. The prefilled syringe of claim 4 wherein the first T-shaped rib has a third radius and the second T-shaped rib has a fourth radius, the third radius being generally equal to the fourth radius.

7. The prefilled syringe of claim 1 wherein the rib section includes a first rectangular rib and a first T-shaped rib.

8. The prefilled syringe of claim 7 wherein the first rectangular rib has a rectangular root width and a rectangular head width, the rectangular root width being greater than the rectangular head width.

9. The prefilled syringe of claim 7 wherein the first T-shaped rib has a T-root width and a T-head width, the T-root width being greater than the T-head width.

10. The prefilled syringe of claim 1 wherein the rib section includes a second pair of ribs, the second pair of ribs having a generally H-shaped cross-section.

11. The prefilled syringe of claim 1 wherein the cannula is co-molded with the rib section.