Patent Number: 6,945,760

Title: Infusion device and driving mechanism and process for same with actuator for multiple infusion uses

Abstract: A drive mechanism for delivery of infusion medium a coil capable of being electrically activated to provide an electromagnetic field. The coil surrounds a piston channel extending in an axial direction. An armature is located adjacent the coil, on one side of the axial channel. The armature is moveable toward a forward position, in response to the electromagnetic field produced by activation of the coil. A piston is located within the piston channel and is moveable axially within the channel to a forward position, in response to movement of the armature to its forward position. The armature and piston are moved toward a retracted position, when the coil is not energized. The armature may be configured with a reduced diameter by including a coil cup for supporting the coil including a shelf portion defining at least a portion of a pole surface of the coil cup.

Inventors: Gray; John (Los Angeles, CA), Bosley; Robert W. (Cerritos, CA), Lorenzen; Eric (Granada Hills, CA)

Assignee: Medtronic Minimed, Inc.

International Classification: F04B 17/03 (20060101); F04B 17/04 (20060101); F04B 017/04 (); H02K 041/00 ()

Expiration Date: 09/20/2022