Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Reexamination Certificate
2004-04-16
2008-10-14
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
C604S151000, C417S477700
Reexamination Certificate
active
07434312
ABSTRACT:
An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller and a hub. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A retracting roller is operably connected to the hub and/or one or more adjacent rollers to permit retraction of the roller during installation of the pump tube between the roller and the race.
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Christenson Steven R.
Haase James M.
Heruth Kenneth T.
Luedi Mandred K.
Robinson Reginald D.
Afzali Sarang
Banner & Witcoff , Ltd.
Bryant David P.
Medtronic Inc.
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