Infusion device and driving mechanism and process for same...

Details Infusion device and driving mechanism and process for same... Infusion device and driving mechanism and process for same...

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 17/04 (2006.01) A61M 5/14 (2006.01) F04B 35/04 (2006.01)

Patent

CA 2754739

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.

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