Patent ID: 7288085
Filing Date: 2007-10-30
Classification: A61M

Abstract:
1. An implantable therapeutic substance delivery device comprising: a housing; a therapeutic substance reservoir; a power source carried in the housing; electronics carried in the housing, the electronics coupled to the power source; and, a permanent magnet solenoid pump carried in the housing and coupled to the electronics, the permanent magnet solenoid pump configured for pumping a therapeutic substance from the therapeutic substance reservoir through an infusion outlet, wherein the permanent magnet solenoid pump comprises a pump piston movable within a pump cylinder, a permanent magnet carried on the pump piston, a first coil formed around the pump cylinder and positioned adjacent a first pole of the permanent magnet, a second coil formed around the pump cylinder and positioned adjacent a second pole of the permanent magnet, and a biasing element biasing the pump piston in one direction within the pump cylinder.