Inductively operated fluid dispensing device

• US 8,789,727 B2
• Filed: 08/29/2012
• Issued: 07/29/2014
• Est. Priority Date: 04/01/2010
• Status: Expired due to Fees

• Current Assignee: Alpimed Sarl
• Original Assignee: Alpimed Sarl
• Inventors: Mortazavi, Behzad
• Primary Examiner(s): Shaver, Kevin P
• Assistant Examiner(s): Buechner, Patrick M
• Application Number:
  US13/598,235
• Publication Number:
  US 20130037578A1
• Time in Patent Office: 699 Days
• Field of Search: 222/325, 222/326, 222/333, 222/386, 222/1, 222/327, 433/89, 433/98, 433/99, 604/67, 604/152, 604/164.01, 604/207, 604/232, 604/235, 417/44.1, 417/53, 417/419
• US Class Current: 222/327
• CPC Class Codes: A61M 5/14546 Front-loading type injectors

Abstract

A device for delivering fluid, having an elongated outer casing (10) provided with a substantially cylindrical inner chamber (11); an inner cartridge (20), for insertion into the inner chamber (11) and including a plunger (21) movable axially along a longitudinal axis A-A of an inner reservoir (22) towards an outlet (28). The device also includes a coil assembly (12, 23, 24) having an outer coil (12), an inner coil (23) and an inner coil core (24). The outer coil (12) is provided on the outer casing (10) and axially oriented along the chamber longitudinal axis. And, the inner coil (23) is provided in the inner cartridge (20) attached to the movable plunger (21).

Claims

1. A device for delivering fluid, comprising:

an elongated outer casing provided with a substantially cylindrical inner chamber;

an inner cartridge, for insertion into said inner chamber and comprising a plunger movable axially along a longitudinal axis of an inner reservoir towards an outlet;

a coil assembly comprising one or several outer coils, on said outer casing and axially oriented along the chamber longitudinal axis,

wherein an inner coil in said inner cartridge is attached to said movable plunger and said coil assembly is adapted for power transmission from the outer coil to the inner coil of the inner cartridge.

2. A device for delivering fluid according to claim 1, further comprising an actuation device configured to provide axial displacement of said plunger in said reservoir.

3. A device for delivering fluid according to claim 2, wherein said actuation device comprises a piezoelectric actuator configured to produce linear motion of the plunger.

4. A device for delivering fluid according to claim 1, said inner coil further comprising an inner coil core, around which said inner coil is spirally arranged.

5. A device for delivering fluid according to claim 1, wherein said coil assembly is operable as a Linear Variable Differential Transformer (LVDT), for indicating the axial position of said plunger along the reservoir.

6. A device for delivering fluid according to claim 1, wherein when the inner cartridge is inserted into the corresponding outer casing, the longitudinal axis of the cartridge reservoir and the longitudinal axis of the chamber are the same.

7. A device for delivering fluid, comprising:

an elongated outer casing provided with a substantially cylindrical inner chamber;

an inner cartridge, for insertion into said inner chamber and comprising a plunger movable axially along a longitudinal axis of an inner reservoir towards an outlet;

a coil assembly comprising one or several outer coils, on said outer casing and axially oriented along the chamber longitudinal axis, wherein said coil assembly is operable as a data transfer unit for data transfer between inner cartridge and outer casing, and

wherein an inner coil in said inner cartridge is attached to said movable plunger.

8. A device for delivering fluid according to claim 7, wherein data transfer is operable at least from inner cartridge towards outer casing.

9. A method for delivering fluid from a cartridge, comprising the steps of:

providing an elongated outer casing having a substantially cylindrical inner chamber;

providing an inner cartridge, for insertion into said inner chamber and comprising a plunger movable axially along a longitudinal axis of an inner reservoir;

providing a coil assembly, such that;

at least one outer coil is provided on said outer casing and axially oriented along the chamber longitudinal axis, and an inner coil is provided in said inner cartridge attached to said movable plunger, wherein power transmission from the at least one outer coil to the inner coil of inner cartridge is used for providing power to an actuation device thereby allowing axial displacement of plunger in said reservoir.

10. A method for delivering fluid according to claim 9, wherein said coil assembly is operable as a data transfer unit for data transfer between inner cartridge and outer casing.

11. A method for delivering fluid according to claim 9, wherein said coil assembly is operable as a Linear Variable Differential Transformer (LVDT), for indicating the axial position of said plunger along the reservoir.