Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Corporeal artificial heart – heart assist – control... – Having enclosed rotary member for directly impelling blood flow
Reexamination Certificate
2007-06-12
2007-06-12
Evanisko, George R. (Department: 3762)
Prosthesis (i.e., artificial body members), parts thereof, or ai
Corporeal artificial heart, heart assist , control...
Having enclosed rotary member for directly impelling blood flow
C623S003280, C600S017000
Reexamination Certificate
active
10297143
ABSTRACT:
Since disruptive forces can be continuously exerted upon a rotor during a pulsatile flow through a pump with a magnetically mounted rotor (permanent magnets and addition control current coils), it is necessary to adjust position i.e. modify axial rotor position very quickly. The control current should only result in small amounts of losses. According to the invention, the current is pulse-width modulated by the control current coils by means of a set value predetermined by a controller which is arranged downstream from a position sensing system. If the set value is high, it is switched to a higher voltage level and the real value of the position sensing system is stored for a defined period of time, respectively beginning with the switching flank of the control current, and the position sensing system is disconnected during said period of time.
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Arndt Andreas
Hoffmann Jan
Merkel Tobias
Berlin Heart AG
Evanisko George R.
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