INJECTION DEVICE WITH NEEDLE SENSOR

• US 20150182706A1
• Filed: 06/11/2013
• Published: 07/02/2015
• Est. Priority Date: 06/15/2012
• Status: Active Grant

• Current Assignee: Ares Trading SA (Merck & Co., Inc.)
• Original Assignee: Ares Trading SA (Merck & Co., Inc.)
• Inventors: Wurmbauer, Werner, Schopf, Josef, Schatz, Bernhard
• Granted Patent: US 10,183,128 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/3107 for needles
• CPC Class Codes: A61M 2005/3118 via the distal end of a syringe, i.e. syringe end for mounting a needle cannula
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/34 Constructions for connecting the needle , e.g. to syringe nozzle or needle hub connecting catheter tubes to hubs A61M25/0014
• CPC Class Codes: A61M 5/5086 for indicating if defective, used, tampered with or unsterile

Abstract

An injection device for injecting liquid medicine to a patient comprises a medicine container (2) an end of which is connectable to a needle (3) and magnetic sensor means (21, 22) for sensing connection of the needle (3) to the medicine container (2).

Claims

1. Injection device for injecting liquid medicine to a patient, comprising a medicine container an end of which is connectable to a needle and magnetic sensor means for sensing connection of the needle to the medicine container.

2. Injection device according to claim 1, wherein the magnetic sensor means comprise:

a movable member actuable by connecting the needle to the medicine container and comprising a magnetic element,

a sensor element sensitive to a magnetic field generated by the magnetic element.

3. Injection device according to claim 2, wherein the movable member is a lever comprising first and second ends, said lever being actuable at said first end by a needle support upon connection of the needle to the medicine container, said second end comprising the magnetic element.

4. Injection device according to claim 3, wherein said second end is farther from said end of the medicine container than is said first end.

5. Injection device according to claim 4, wherein a distance between a hinge point of the lever and the second end is larger than a distance between said hinge point and the first end.

6. Injection device according to claim 3, further comprising a spring acting on the lever for maintaining the lever in a rest position when the needle is not connected to the medicine container.

7. Injection device according to claim 2, further comprising a wall between the magnetic element and the sensor element to protect the sensor element from contamination by the medicine.

8. Injection device according to claim 7, wherein said wall is made of a non-magnetic material.

9. Injection device according to claim 2, wherein the magnetic element is a permanent magnet.

10. Injection device according to claim 2, wherein the sensor element is a Hall effect sensor.