Cartridge with a wheel for sealing the opening

• US 7,552,843 B2
• Filed: 03/22/2006
• Issued: 06/30/2009
• Est. Priority Date: 03/22/2005
• Status: Expired due to Fees

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Kuriger, Rex J., Ruan, Tieming
• Primary Examiner(s): Crawford; Gene
• Assistant Examiner(s): COLLINS, MICHAEL
• Application Number:
  US11/885,911
• Publication Number:
  US 20080164280A1
• Time in Patent Office: 1,196 Days
• Field of Search: 221 1-312 C
• US Class Current: 221/228
• CPC Class Codes: G01N 33/48757 Test elements dispensed from a stack

Abstract

A dispensing mechanism is adapted to eject a test sensor from a cartridge opening formed in a cartridge containing test sensors. The dispensing mechanism comprises a gear rack, a gear, and a wheel. The gear rack includes a first portion and a second portion located generally parallel to one another. The second portion of the gear rack includes a first plurality of teeth. The gear includes a second plurality of teeth that are adapted to be engaged by the first plurality of teeth upon movement of the gear rack. The wheel is operatively engaged by the gear and is adapted to dispense the test sensor from the cartridge opening and to seal the cartridge opening. The movement of the gear rack in a first direction causes the gear to rotate causing the wheel to rotate. The rotation of the wheel dispenses the test sensor through the cartridge opening.

Claims

1. A dispensing mechanism for ejecting a test sensor from a cartridge opening formed in a cartridge containing a plurality of test sensors, the dispensing mechanism comprising:

a gear rack including a first portion and a second portion located generally parallel to one another, the second portion of the gear rack including a first plurality of teeth;

a gear including a second plurality of teeth, the second plurality of teeth being adapted to be engaged by the first plurality of teeth upon movement of the gear rack; and

a wheel operatively engaged by the gear, the wheel being adapted to dispense the test sensor from the cartridge opening and to seal the cartridge opening,

wherein movement of the gear rack in a first direction causes the gear to rotate causing the wheel to rotate, the rotation of the wheel dispensing the test sensor through the cartridge opening.

2. The dispensing mechanism of claim 1, wherein the first portion of the gear rack includes an acclivity and the second portion of the gear rack includes a complimentary declivity.

3. The dispensing mechanism of claim 2, wherein a sealing portion extends from the acclivity, the sealing portion being adapted to place the gear in a resting position.

4. The dispensing mechanism of claim 3, wherein the wheel seals the cartridge opening when the gear is placed in the resting position.

5. The dispensing mechanism of claim 2, wherein the declivity causes the wheel to move away from the cartridge so as to expose a portion of the cartridge opening, the test sensor being dispensed through the exposed portion of the cartridge opening.

6. The dispensing mechanism of claim 1, wherein the wheel comprises rubber.

7. The dispensing mechanism of claim 1, wherein the diameter of the wheel is greater than the diameter of the gear.

8. The dispensing mechanism of claim 7, wherein the test sensor is moved further in the first direction than the gear rack when the gear rack is moved in the first direction.

9. The dispensing mechanism of claim 1, wherein the movement of the gear rack in the first direction moves the test sensor in the first direction.

10. The dispensing mechanism of claim 1, further comprising a slider located on the gear rack, the slider being adapted to move the gear rack between a resting position and a dispensing position.

11. A cartridge comprising:

a plurality of walls forming at least one cavity therein, the cavity being adapted to contain a plurality of test sensors, the plurality of test sensors being adapted to assist in the determination of a concentration of an analyte in a fluid sample, at least one of the plurality of walls forming an opening adapted to allow a test sensor to be dispensed therefrom;

a dispensing mechanism adapted to dispense a test sensor through the opening, the dispensing mechanism including,

(i) a gear rack including a first portion and a second portion located generally parallel to one another, the second portion of the gear rack including a first plurality of teeth,

(ii) a gear including a second plurality of teeth, the second plurality of teeth being adapted to be engaged by the first plurality of teeth upon movement of the gear rack, and

(iii) a wheel operatively engaged by the gear, the wheel being adapted to dispense the test sensor from the opening and to seal the opening;

a retention plate located in the at least one cavity, the retention plate being adapted to engage at least one of the plurality of test sensors; and

a spring mechanism adapted to engage the retention plate, the spring mechanism exerting a force on the retention plate in the direction of the wheel,

wherein the spring mechanism and the retention plate force at least one of the test sensors into contact with a portion of the wheel of the dispensing mechanism.

12. The cartridge of claim 11, wherein the at least one cavity is two cavities separated by a divide, the two cavities being in communication with each other, the first cavity containing the plurality of test strips and the second cavity containing a desiccant.

13. The cartridge of claim 11, wherein the walls of the cartridge form only one opening therein.

14. The cartridge of claim 11, wherein the spring mechanism includes a plurality of springs extending between one of the plurality of walls and the retention plate.

15. The cartridge of claim 11, wherein the spring mechanism includes a torsion spring located between one of the plurality of walls and the retention plate.

16. A dispensing mechanism for ejecting a test sensor from a cartridge opening formed in a cartridge containing a plurality of test sensors, the dispensing mechanism comprising:

a plurality of gears, each of the plurality of gears including a plurality of teeth;

a wheel operatively engaged by the plurality of gears, the wheel being adapted to dispense the test sensor from the cartridge opening and to seal the cartridge opening; and

a gear rack including a plurality of first portions and a plurality of second portions located generally parallel to one another, at least one of the plurality of first and second portions being located on opposite sides of the wheel, the plurality of second portions of the gear rack each including a plurality of teeth, the plurality of teeth on the plurality of second portions being adapted to engage the plurality of teeth on the plurality of gears,

wherein movement of the gear rack in a first direction causes the plurality of gears to rotate causing the wheel to rotate, the rotation of the wheel dispensing the test sensor through the cartridge opening.

17. The dispensing mechanism of claim 16, wherein the first portion of the gear rack includes an acclivity and the second portion of the gear rack includes a complimentary declivity.

18. The dispensing mechanism of claim 17, wherein a sealing portion extends from the acclivity, the sealing portion being adapted to place the gear in a resting position.

19. The dispensing mechanism of claim 18, wherein the wheel seals the cartridge opening when the gear is placed in the resting position.

20. The dispensing mechanism of claim 16, wherein the diameter of the wheel is greater than the diameter of the gear.

21. The dispensing mechanism of claim 20, wherein the test sensor is moved further in the first direction than the gear rack when the gear rack is moved in the first direction.

22. A cartridge comprising:

a plurality of walls forming at least one cavity therein, the cavity being adapted to contain a plurality of test sensors, the plurality of test sensors being adapted to assist in the determination of a concentration of an analyte in a fluid sample, at least one of the plurality of walls having an opening adapted to allow a test sensor to be dispensed therefrom;

a dispensing mechanism adapted to dispense a test sensor through the opening, the dispensing mechanism including,

(i) a plurality of gears, each of the plurality of gears including a plurality of teeth,

(ii) a wheel operatively engaged by the plurality of gears, the wheel being adapted to dispense the test sensor from the cartridge opening and to seal the cartridge opening, and

(iii) a gear rack including a plurality of first portions and a plurality of second portions located generally parallel to one another, at least one of the plurality of first and second portions being located on opposite sides of the wheel, the plurality of second portions of the gear rack each including a plurality of teeth, the plurality of teeth on the plurality of second portions being adapted to engage the plurality of teeth on the plurality of gears;

a retention plate located in the at least one cavity, the retention plate being adapted to engage at least one of the plurality of test sensors; and

a spring mechanism adapted to engage the retention plate, the spring mechanism exerting a force on the retention plate in the direction of the wheel,

wherein the spring mechanism and the retention plate force at least one of the test sensors into contact with a portion of the wheel of the dispensing mechanism.

23. The cartridge of claim 22, wherein the at least one cavity is two cavities separated by a divide, the two cavities being in communication with each other, the first cavity containing the plurality of test strips and the second cavity containing a desiccant.

24. The cartridge of claim 22, wherein the walls of the cartridge have only one opening formed therein.

25. A method of dispensing a test sensor, the method comprising the acts of:

providing a container, the container including a plurality of walls forming at least one cavity therein, the cavity containing a plurality of test sensors, the plurality of test sensors being adapted to assist in the determination of a concentration of an analyte in a fluid sample, at least one of the plurality of walls forming an opening adapted to allow a test sensor to be dispensed therefrom;

providing a dispensing mechanism including

(i) a gear rack including a first portion and a second portion located generally parallel to one another, the second portion of the gear rack including a first plurality of teeth,

(ii) a gear including a second plurality of teeth, the second plurality of teeth being adapted to be engaged by the first plurality of teeth upon movement of the gear rack, and

(iii) a wheel operatively engaged by the gear;

moving the wheel from a position of sealing the opening;

dispensing a test sensor from the container through the opening after the wheel has been moved from the position of sealing the opening.

26. The method of claim 25 wherein dispensing of the test sensor including the wheel contacting the test sensor and assisting in moving the test sensor through the opening.

27. A method using a cartridge comprising:

providing a container, the container including a plurality of walls forming at least one cavity therein, the cavity being adapted to contain a plurality of test sensors, the plurality of test sensors being adapted to assist in the determination of a concentration of an analyte in a fluid sample, at least one of the plurality of walls forming an opening adapted to allow a test sensor to be dispensed therefrom;

providing a dispensing mechanism including

(i) a plurality of gears, each of the plurality of gears including a plurality of teeth,

(ii) a wheel operatively engaged by the plurality of gears, the wheel being adapted to dispense the test sensor from the cartridge opening and to seal the cartridge opening, and

(iii) a gear rack including a plurality of first portions and a plurality of second portions located generally parallel to one another, at least one of the plurality of first and second portions being located on opposite sides of the wheel, the plurality of second portions of the gear rack each including a plurality of teeth, the plurality of teeth on the plurality of second portions being adapted to engage the plurality of teeth on the plurality of gears;

moving the wheel from a position of sealing the opening;

dispensing a test sensor from the container through the opening after the wheel has been moved from the position of sealing the opening.

28. The method of claim 27 wherein dispensing of the test sensor including the wheel contacting the test sensor and assisting in moving the test sensor through the opening.