Syringe with co-molded hub and cannula

• US 8,721,603 B2
• Filed: 09/20/2011
• Issued: 05/13/2014
• 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
• Primary Examiner(s): Schmidt, Emily
• Assistant Examiner(s): PENG, LAUREN MICHELE
• Application Number:
  US13/237,429
• Publication Number:
  US 20120010573A1
• Time in Patent Office: 966 Days
• Field of Search: 604/181, 604/187, 604/164.07, 604/272, 604/240, 604190-199, 604241-249, 604/263
• 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 of the cannula 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 including a first pair of ribs and a second pair of ribs, the first pair of ribs having a generally rectangular-shaped cross-section and the second pair of ribs having a generally H-shaped cross-section, the cannula co-molded with the rib section.

2. The prefilled syringe of claim 1 wherein the rib section has a generally cruciform cross-section taken along a rib plane, the rib plane being generally perpendicular to the longitudinal axis.

3. The prefilled syringe of claim 1 wherein the cap has a generally U-shaped cross-section taken along a longitudinal plane, the longitudinal plane being generally parallel to the longitudinal axis.

4. The prefilled syringe of claim 1 wherein the first pair of ribs include a first rectangular rib and a second rectangular rib, the first rectangular rib having a first radius and the second rectangular rib have a second radius, the first radius being generally equal to the second radius.

5. The prefilled syringe of claim 1 wherein the second pair of ribs include a first T-shaped rib and a second T-shaped rib, the first T-shaped rib having a third radius and the second T-shaped rib having a fourth radius, the third radius being generally equal to the fourth radius.

6. The prefilled syringe of claim 1 further comprising:

a needle shield configured for removable mounting to the cap, the cap being tapered to allow the needle shield to removably mount to the syringe, the cap including an upstanding wall and a base, the upstanding wall engaging the needle shield in a mounted position, the engagement between the needle shield and the upstanding wall limiting leakage of the medicament in the mounted position.

7. The prefilled syringe of claim 6 wherein the cap is generally hollow, the cap having a U-shaped cross-section taken along a longitudinal plane that extends through and generally parallel with the longitudinal axis.

8. The prefilled syringe of claim 1 wherein the first pair of ribs includes a first rectangular rib and the second pair of ribs includes a first T-shaped rib, the first rectangular rib has a first radius and the first T-shaped rib has a third radius, the first radius being generally equal to the third radius.

9. The prefilled syringe of claim 1 wherein the cannula includes notches defined in the proximal end of the cannula, the hub in facing engagement with the cannula at the proximal end, the notches configured for affixing and securing the proximal end to the hub.