Threaded medication cartridge

• US 6,017,331 A
• Filed: 02/20/1998
• Issued: 01/25/2000
• Est. Priority Date: 02/20/1998
• Status: Expired due to Term

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Watts, Lennox, Linfante, John, Bustamante, Carlos A., Walters, Daniel A., Hoeck, Roger W.
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): Blyveis, Deborah
• Application Number:
  US09/027,404
• Time in Patent Office: 704 Days
• Field of Search: 604/232-235, 604/181, 604/187, 604/134-138, 604/156, 604/157, 604/200, 604/201, 604/205
• US Class Current: 604/232
• CPC Class Codes: A61M 2005/2492 via snap connection
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: B65D 51/002 Closures to be pierced by an extracting-device for the contents and fixed on the container by separate retaining means

Abstract

A medication cartridge for use with a medication delivery pen having a cartridge body with threads at its distal end for receiving a pen-needle. The threads are either integrally molded in the cartridge or on the outer surface of a cap used to retain a septum on the distal end of the cartridge body. The cartridge body of the medication cartridge also includes threads or a snap-ring at its proximal end for attaching the medication cartridge directly to a pen body housing of the medication delivery pen without the need for a medication cartridge holder.

Claims

1. A medication cartridge comprising:

a cartridge body having a distal end, a proximal end and a hub attached to said distal end, said hub including a set of threads and an outer sleeve attached to an inner sleeve by a plurality of connecting ribs having an opening between each rib;

a septum for mounting on said hub; and

a septum retention cap for retaining said septum on said hub, said septum retention cap including a plurality of legs with each leg being received in one of said openings in said hub to retain said septum on said hub.

2. A medication cartridge according to claim 1, further comprising an arrowhead at a proximal end of each of said plurality of legs on said septum retention cap.

3. A medication cartridge according to claim 2, wherein each of said plurality of ribs has a triangular shape with a point in a distal direction to guide each arrowhead on said leg into a respective one of said plurality of openings.