Injection device

• US 6,945,961 B2
• Filed: 07/01/2003
• Issued: 09/20/2005
• Est. Priority Date: 07/10/2002
• Status: Expired due to Fees

• Current Assignee: Novo Nordisk A/S
• Original Assignee: Novo Nordisk A/S
• Inventors: Miller, Thomas Dedenroth, Hansen, Steffen, Moller, Claus Schmidt
• Primary Examiner(s): Lucchesi, Nicholas D.
• Assistant Examiner(s): WILLIAMS, CATHERINE SERKE
• Application Number:
  US10/611,389
• Publication Number:
  US 20040064104A1
• Time in Patent Office: 812 Days
• Field of Search: 604/232, 604/220, 604/228, 604/229, 604/71, 604/246, 604/181, 604186-187, 604207-211, 604/218, 604223-225, 222/309, 222/390, 222/391
• US Class Current: 604/207
• CPC Class Codes: A61M 2005/31518 designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 5/3146 Priming, e.g. purging, reducing backlash or clearance
• CPC Class Codes: A61M 5/31525 Dosing burettes, pipettes B01L3/02
• CPC Class Codes: A61M 5/31535 Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
• CPC Class Codes: A61M 5/31541 Means preventing setting of a dose beyond the amount remaining in the cartridge
• CPC Class Codes: A61M 5/31553 without axial movement of dose setting member
• CPC Class Codes: A61M 5/31558 using scaling up or down transmissions, e.g. gearbox
• CPC Class Codes: A61M 5/3156 using volume steps only adjustable in discrete intervals, i.e. individually distinct intervals
• CPC Class Codes: A61M 5/31585 performed by axially moving actuator, e.g. an injection button
• CPC Class Codes: A61M 5/31595 Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking

Abstract

An injection device having an incremental clicking mechanism providing the user with an indication of the number of doses being set. For handling different types of medicaments having different dose volumes in the same type of injection device it is beneficial to provide an additional clicking mechanism which is easy changeable. The clicking mechanism is preferably a curved track provided between the dose setting member and a non-rotatable clicker element.

Claims

1. An injection device having a housing accommodating a cartridge containing medicine sufficient for a number of dosed injections, which doses are injected by advancing a piston rod forward inside the cartridge, comprising:

a dose setting and injection mechanism, comprising an incremental feedback mechanism,

a rotatable dose setting member operationally coupled to the dose setting and injection mechanism for setting up a dose to be injected, and

an injection button operationally coupled to the dose setting and injection mechanism and by which the dose setting and injection mechanism can be activated for advancing the piston rod forward to press out the set dose through a conduit connected to said cartridge,

wherein;

an additional clicking means is provided between the rotatable dose setting member and a non-rotatable clicker element, and wherein the additional clicking means provides incremental clicks corresponding to a dose volume,

the clicking means comprises a curved track provided as a part of the rotatable dose setting member wherein curved track engages the non-rotatable clicker element provided on or as a part of the injection device,

the curved track is provided with a number of spared indentations,

there are 5 to 60 equally spaced indentations, and

an air shot indentation is provided between the first equally spaced indentations.

2. An injection device having a housing accommodating a cartridge containing medicine sufficient for a number of dosed injections, which doses are injected by advancing a piston rod forward inside the cartridge, comprising:

a dose setting and injection mechanism, comprising an incremental feedback mechanism,

a rotatable dose setting member operationally coupled to the dose setting and injection mechanism for setting up a dose to be injected, and

an injection button operationally coupled to the dose setting and injection mechanism and by which the dose setting and injection mechanism can be activated for advancing the piston rod forward to press out the set dose through a conduit connected to said cartridge,

wherein;

an additional clicking element is provided between the rotatable dose setting member and a non-rotatable clicker element, and wherein the additional clicking element provides incremental clicks corresponding to a dose volume,

the clicking element comprises a curved track provided as a part of the rotatable dose setting member wherein curved track engages the non-rotatable clicker element provided on or as a part of the injection device,

the curved track is provided with a number of equally spaced indentations, there are more than 2 spaced indentations, and

an air shot indentation is provided between the two first equally spaced indentations.