INDICATION MECHANISM FOR AN AUTOMATIC APPLICATOR, PARTICULARLY FOR INSULIN

• US 20120197207A1
• Filed: 01/31/2012
• Published: 08/02/2012
• Est. Priority Date: 07/31/2009
• Status: Active Grant

• Current Assignee: Nemera Szczecin Spolka Z Ograniczona Odpowiedzialnoscia
• Original Assignee: Copernicus Sp. Z o.o.
• Inventors: STEFANSKI, Adam
• Granted Patent: US 8,894,619 B2
• Time in Patent Office: Days
• US Class Current: 604/189
• CPC Class Codes: A61M 2005/2026 Semi-automatic, e.g. user activated piston is assisted by additional source of energy
• CPC Class Codes: A61M 2005/3126 Specific display means related to dosing
• 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 5/31 Details
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/31528 by means of rotational movements, e.g. screw-thread mechanisms
• CPC Class Codes: A61M 5/31543 piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change
• CPC Class Codes: A61M 5/3155 by rotational movement of dose setting member, e.g. during setting or filling of a syringe
• CPC Class Codes: A61M 5/31553 without axial movement of dose setting member
• CPC Class Codes: A61M 5/31556 Accuracy improving means
• CPC Class Codes: A61M 5/31583 based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
• CPC Class Codes: Y10T 29/49 Method of mechanical manufacture

Abstract

The present disclosure concerns an indication mechanism for an automatic applicator, particularly for insulin or other liquid preparations, particularly for multiple injection administration of set doses of a medicine from an exchangeable container, for example for the self-application of insulin by diabetes patients. An indication mechanism for an automatic applicator, having an assembly of at least two barrels movably coupled to each other has an indication barrel mounted on the driving barrel contains only marking on its external surface and is co-axially connected to the pull-push control nut.

Claims

1. An indication mechanism for an automatic applicator, particularly for insulin or other liquid preparations, particularly for multiple injection administration of set doses of a medicine from an exchangeable container, comprising:

an applicator housing;

an assembly of at least two barrels movably coupled to each other, wherein one barrel is an indication barrel mounted on the other barrel, the other barrel being a driving barrel, directly inside the applicator housing, the indication barrel containing a dose scale on an external surface, characterised in that the indication barrel containing the dose scale on its external surface is mounted slidingly, co-axially and lengthwise, by a key coupling, directly on an external surface of the driving barrel, without touching an internal surface of the applicator housing, and the indication barrel, at a distal ending being co-axially and directly connected to a separate pull-push control nut, the pull-push control nut being mounted rotatably on the driving barrel co-axially and lengthwise, wherein the indication barrel functions to indicate the set dose and is functions separately from the dose setting mechanism.

2. The indication mechanism according to claim 1, characterised in that the indication barrel is mounted by a splined coupling comprising grooves and the keys.

3. The indication mechanism according to claim 2, wherein the splined coupling comprises bayonet keys.

4. The indication mechanism according to claim 2, characterised in that the indication barrel is mounted slidingly between two end positions defining a working range of the indication barrel.

5. The indication mechanism according to claim 1, characterised in that the driving barrel is mounted rotatably within the applicator housing.

6. The indication mechanism according to claim 1, characterised in that the pull-push control nut is mounted on the driving barrel by means of a thread coupling.

7. The indication mechanism according to claim 6, wherein the thread coupling comprises a non self-locking thread.

8. The indication mechanism according to claim 1, characterised in that the pull-push control nut is mounted slidingly, co-axially and lengthwise in the applicator housing by means of a key coupling.

9. The indication mechanism according claim 8, wherein the key coupling is a splined coupling.

10. The indication mechanism according to claim 1, characterised in that the indication barrel is mounted lengthwise to the pull-push control nut by a catch unit.

11. The indication mechanism according to claim 10, wherein the catch unit is a circumferential catch unit comprising an indication barrel catch and a control nut catch.

12. The indication mechanism according to claim 1, characterised in that the indication barrel is mounted on the driving barrel with its external surface situated at a predefined distance, greater than zero, from the internal surface of the applicator housing.

13. The indication mechanism according to claim 1, characterised in that the dose scale on the external surface of the indication barrel is in the form of spirally disposed indication numerals.

14. The indication mechanism according to claim 1, characterised in that the driving barrel is resiliently connected to a driving element.

15. The indication mechanism according to claim 14, wherein the driving barrel is resiliently connected to the driving element with a helical spring.

16. The indication mechanism according to claim 1, characterised in that the driving barrel is connected to a mechanism for medicine dose setting.