Controlled Needle-Free Transport

Patent metadata

Field	Value
Publication number	US-2016197542-A1
Application number	US-201615066868-A
Country	US
Kind code	A1
Filing date	Mar 10, 2016
Priority date	Feb 11, 2005
Publication date	Jul 7, 2016
Grant date	—

Abstract

A needle-free transdermal transport device for transferring a substance across a surface of a biological body includes a reservoir for storing the substance, a nozzle in fluid communication with the reservoir and a controllable electromagnetic actuator in communication with the reservoir. The actuator, referred to as a Lorentz force actuator, includes a stationary magnet assembly and a moving coil assembly. The coil assembly moves a piston having an end portion positioned within the reservoir. The actuator receives an electrical input and generates in response a corresponding force acting on the piston and causing a needle-free transfer of the substance between the reservoir and the biological body. The magnitude, direction and duration of the force are dynamically controlled (e.g., servo-controlled) by the electrical input and can be altered during the course of an actuation cycle. Beneficially, the actuator can be moved in different directions according to the electrical input.

First claim

What is claimed is:

1 . A linear electromagnetic actuator comprising:
a stationary magnet assembly providing a magnetic field; a coil assembly receiving an electrical input, the coil assembly slidably disposed with respect to the magnet assembly; and a stationary bearing surface formed over a length that abuts the magnet assembly a first bearing surface defined along a distal portion of the coil assembly and adapted to slide relative to the stationary bearing surface.

2 . The linear electromagnetic actuator of claim 1 further comprising a second bearing surface defined along a proximal portion of the coil assembly also adapted to slide relative to the stationary bearing surface.

3 . The linear electromagnetic actuator of claim 2 further comprising a ferromagnetic shell including one or more extensions extending from a distal end of the shell, the shell and the extensions providing the stationary bearing surface.

4 . The linear electromagnetic actuator of claim 1 in a needle-free transdermal transport device.

5 . The linear electromagnetic actuator of claim 4 further comprising a reservoir in communication with the actuator and a nozzle in fluid communication with the reservoir.

Assignees

• Massachusetts Inst Technology

Inventors

• Hunter Ian W
• Taberner Andrew J
• Hemond Brian D
• Wendell Dawn M
• Hogan Nora Catherine
• Ball Nathan B

Classifications

• A61M5/30

  Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules · CPC title

• H02K41/02 Primary

  Linear motors; Sectional motors · CPC title

• A61M2205/6009

  for matching patient with his treatment, e.g. to improve transfusion security · CPC title

• A61M2205/825

  using mechanical generation of electricity, e.g. hand cranked generators · CPC title

• H02K33/00

  Motors with reciprocating, oscillating or vibrating magnet, armature or coil system (arrangements for handling mechanical energy structurally associated with motors H02K7/00, e.g. H02K7/06) · CPC title