Pen-type injector having holding mechanism for medicament cartridge

• US 7,081,108 B2
• Filed: 12/21/2001
• Issued: 07/25/2006
• Est. Priority Date: 12/22/2000
• Status: Expired due to Term

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Dca Design International Ltd.
• Inventors: Veasey, Robert Frederick, Langley, Christopher Nigel, Woolston, Robert, Day, Shane Alistair
• Primary Examiner(s): Williams, Catherine S.
• Application Number:
  US10/433,822
• Publication Number:
  US 20040044317A1
• Time in Patent Office: 1,677 Days
• Field of Search: 604/232, 604/234, 604/235, 604/243, 604/151, 604/187, 604/263, 604/240, 604/250, 600576-577, 128/912
• US Class Current: 604/232
• CPC Class Codes: A61M 2005/31588 electrically driven
• CPC Class Codes: A61M 2205/215 Tilt detection, e.g. for warning or shut-off
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump
• CPC Class Codes: A61M 5/20 Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically A61M5/142 , A61M5/46 take precedence; hypodermic projectiles F42B12/54
• CPC Class Codes: A61M 5/31525 Dosing burettes, pipettes B01L3/02
• CPC Class Codes: A61M 5/31546 Electrically operated dose setting, e.g. input via touch screen or plus/minus buttons
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: Y10S 128/01 Motorized syringe

Abstract

An injection device for injection of a medicament from a medicament cartridge 40 having a neck portion is disclosed. The injection device further comprises a main housing 4 in which the medicament cartridge 40 is releasably retained by first and second retaining means 92,94. The retaining means 92,94 are each moveable between a first position in which the neck portion is engaged thereby to retain the medicament cartridge 40 in the main housing 4 and a second position which allows the medicament cartridge 40 to be removed from the main housing 4.

Claims

1. An injection device for injection of a medicament from a medicament cartridge having a neck portion, the injection device comprising:

a main housing in which the medicament cartridge is releasably retained by first and second retaining means, the retaining means each being moveable between a first position in which the neck portion is engaged thereby to retain the medicament cartridge in the main housing and a second position which allows the medicament cartridge to be removed from the main housing;

spring means disposed between the first and second retaining means to urge the first and second retaining means toward the second position; and

a slider tab acting on each of the first and second retaining means to urge the first and second retaining means towards the first position.

2. An injection device according to claim 1, wherein, the slider tab acts on an external face of each of the first and second retaining means.

3. An injection device according to claim 1, wherein, the slider tab is slidably retained within a groove formed in the main housing.

4. An injection device according to claim 1, wherein, the slider tab is adapted to engage the neck portion of the medicament cartridge.

5. An injection device according to claim 1, wherein, the main housing includes an end stop to prevent movement of the first and second retaining means beyond the second position.

6. An injection device according to claim 1, wherein, the first and second retaining means move radially about a common pivot point.