End of injection indicator for injection pen

• US 9,827,378 B2
• Filed: 09/02/2016
• Issued: 11/28/2017
• Est. Priority Date: 03/18/2011
• Status: Active Grant

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Quinn, Michael, Cronenberg, Richard, Shetty, Gautam
• Primary Examiner(s): FLICK, JASON E
• Application Number:
  US15/255,446
• Publication Number:
  US 20160367759A1
• Time in Patent Office: 452 Days
• Field of Search: 604207
• CPC Class Codes: A61M 2005/3126 Specific display means related to dosing
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 5/31533 Dosing mechanisms, i.e. setting a dose administrating mechanisms A61M5/31565
• CPC Class Codes: A61M 5/31551 including axial movement of dose setting member
• CPC Class Codes: A61M 5/3157 Means providing feedback signals when administration is completed A61M5/20 takes precedence
• CPC Class Codes: A61M 5/31585 performed by axially moving actuator, e.g. an injection button

Abstract

A medication injection pen (50) includes a housing (1) and a dose set knob (2) rotatably connected to the housing (1) for setting a dose. An indicator member (200) is movable between a visible position indicating a zero position of the dose set knob (2) and a non-visible position indicating a non-zero position of the dose set knob (2). The indicator member is visible to a user in the visible position and not visible to the user in the non-visible position. The dose set knob is in the zero position when a set dose has been completely administered. Accordingly, a visible indication is provided to the user when a set dose has been completely administered.

Claims

1. A medication injection pen, comprising:

a housing;

a dose set member connected to the housing for setting a dose; and

a window disposed in the housing such that the dose set member is visible in the window to indicate a zero position of the dose set member and no portion of the dose set member is visible in the window to indicate a non-zero position, the dose set member being in the zero position when a set dose has been completely administered.

2. The medication injection pen according to claim 1, wherein the window includes a surface that is substantially parallel to a longitudinal axis of an upper body of the pen.

3. The medication injection pen according to claim 1, wherein the window includes a surface that is substantially perpendicular to a longitudinal axis of an upper body of the pen.

4. The medication injection pen according to claim 1, wherein the dose set member has a cut-out portion formed by an inverted substantially V-shaped cut at a distal end thereof to facilitate visibility of the outer surface of the dose set member through the window.

5. The medication injection pen according to claim 1, wherein an outer surface of the dose set member has a printed line or block that is only visible when the dose set member is in the zero position.

6. The medication injection pen according to claim 1, wherein the window includes a plurality of windows.

7. A medication injection pen, comprising:

a housing;

a dose set member connected to the housing for setting a dose;

a plurality of numerals corresponding to a set dose;

an indicator member positioned distally of the plurality of numerals and movable between a visible position indicating a zero position of the dose set member and a non-visible position indicating a non-zero position of the dose set member, the dose set member being in the zero position when a set dose has been completely administered;

wherein the indicator member is visible in the visible position and not visible in the non-visible position.

8. The medication injection pen according to claim 7, wherein the housing is transparent or translucent to facilitate visibility of the indicator member.

9. The medication injection pen according to claim 7, wherein the indicator member does not rotate and is limited to axial movement.

10. The medication injection pen according to claim 7, wherein:

an insert is fixed to the housing and has a boss extending outwardly therefrom, the insert includes at least one arm extending towards the dose set member; and

a track in the indicator member receives the boss to guide the indicator member between the visible position and the non-visible position.

11. The medication injection pen according to claim 10, further comprising:

a lug disposed adjacent to a distal end of the dose set member;

wherein the arm of the insert engages the lug.

12. The medication injection pen according to claim 11, wherein as the dose set member is rotated during dose setting, the lug on the dose set member engages a portion of the arm to cause the insert to rotate.

13. The medication injection pen according to claim 10, wherein

the insert includes a track;

and

the indicator member includes a boss;

wherein as the insert rotates, the track performs a camming function with the boss such that the indicator member retracts as the boss traverses the track.