Pen-type injector having an electronic control unit

• US 20040054328A1
• Filed: 06/06/2003
• Published: 03/18/2004
• Est. Priority Date: 12/22/2000
• Status: Abandoned Application

• Current Assignee: Christopher Nigel Langley, Shane Alistair Day
• Original Assignee: Christopher Nigel Langley, Shane Alistair Day
• Inventors: Langley, Christopher Nigel, Day, Shane Alistair
• Application Number:
  US10/433,645
• Publication Number:
  US 20040054328A1
• Time in Patent Office: Days
• US Class Current: 604/151
• CPC Class Codes: A61M 2005/31588 electrically driven
• CPC Class Codes: A61M 2205/215 Tilt detection, e.g. for warning or shut-off
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump
• 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 5/31525 Dosing burettes, pipettes B01L3/02
• CPC Class Codes: A61M 5/31546 Electrically operated dose setting, e.g. input via touch screen or plus/minus buttons
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: Y10S 128/01 Motorized syringe

Abstract

An injection device for injection of a medicament from a medicament cartridge, the medicament cartridge (40) having a bung (48) displaceable within the medicament cartridge (40) to cause medicament to be expelled from the medicament cartridge (40) is disclosed. The injection device comprises a drive mechanism (42) for selectively acting on the bung (48) to dispense the medicament from the medicament cartridge (40) and an electronic control unit for controlling operation of the drive mechanism (42). Under the control of the electronic control unit the drive mechanism (42) initially acts at first speed and at a second speed thereafter.

Claims

1. An injection device for injection of a medicament from a medicament cartridge, the medicament cartridge 40 having a bung 48 displaceable within the medicament cartridge 40 to cause medicament to be expelled from the medicament cartridge 40, the injection device comprising a drive mechanism 42 for selectively acting on the bung 48 to dispense the medicament from the medicament cartridge 40 and an electronic control unit for controlling operation of the drive mechanism 42 in which the drive mechanism 42 under the control of the electronic control unit initially acts at a first speed and at a second speed thereafter.

2. An injection device according to claim 1, characterised in that the first speed is slower than the second speed.

3. An injection device according to claim 2, characterised in that the second speed is controlled by a user of the injection device.

4. An injection device according to claim 1, in which the device further comprises means to detect resistance to dispense, said means providing a resistance to dispense signal to the electronic control unit, in which the drive mechanism 42, following receipt of the resistance to dispense signal by the electronic control unit, under the control of the electronic control unit, acts at the second speed, the second speed being slower than the first speed.

5. An injection device according to claim 4, in which when the resistance to dispense signals continue for a predetermined time following the drive mechanism 42 acting at the second speed, the electronic control unit halts the drive mechanism 42.

6. A method of dispensing a dose of medicament from a medicament cartridge within an injection device having a drive mechanism 42 for selectively acting on a bung 48 of the medicament cartridge 40 comprising the steps of causing the drive mechanism 42 to act on the bung 48 at a first speed;

and causing the drive mechanism 42 to act on the bung 48 at a second speed thereafter.

7. A method according to claim 6 characterised in that the first speed is slower than the second speed.

8. A method according to claim 7 characterised in that the second speed is controlled by the user of the injection device.

9. A method according to claim 6, in which the first speed is faster than the second speed.