On May 17, 2016 , the USPTO issued U.S. Patent Number 9,339,597 to Hridaya, Inc., which was successfully prosecuted by Novel IP.
The '597 patent is directed towards a hemodynamic flow assist device includes a miniature pump, a basket-like cage enclosing and supporting the pump, and a motor to drive the pump. The device is implanted and retrieved in a minimally invasive manner via percutaneous access to a patient's artery. The device has a first, collapsed configuration to assist in implantation and a second, expanded configuration once deployed and active. The device is deployed within a patient's aorta and is secured in place via a self-expanding cage which engages the inner wall of the aorta. The device includes a helical screw pump with self-expanding blades. Also included is a retrieval device to remove the hemodynamic flow assist device once it is no longer needed by the patient. Also included is an arterial closure device to close the artery access point after implantation and removal of the hemodynamic flow assist device. The hemodynamic flow assist device helps to increase blood flow in patients suffering from congestive heart failure and awaiting heart transplant.
Independent Claim 1 describes "An intravascular hemodynamic flow assist device comprising: a first shaft having a lumen, a proximal end, and a distal end, said first shaft comprising a first blade attachment ring segment, wherein the first blade attachment ring segment comprises a first cylindrical ring portion for attachment to the first shaft and at least one curved first blade unit connected to the first cylindrical ring portion and extending outwardly from the first cylindrical ring portion; and a second blade attachment ring segment, physically separate from the first blade attachment ring segment, positioned in-line and distal to said first blade attachment ring segment, wherein the second blade attachment ring segment comprises a second cylindrical ring portion for attachment to the first shaft and at least one curved second blade unit connected to the second cylindrical ring portion and extending outwardly from the second cylindrical ring portion, wherein, when said device is deployed, said at least one curved first blade unit and at least one curved second blade unit form, in combination, a helical screw pump; and a second shaft having a proximal end and a distal end, wherein a portion of said proximal end of said second shaft is disposed within, and configured to telescope into and out of, a portion said lumen of said first shaft at the distal end of said first shaft; a motor positioned at said proximal end of said first shaft for coaxially rotating said first shaft and said blades about said second shaft to pump blood through the device; a housing containing said motor; a cap attached to said distal end of said second shaft; a plurality of arms each having a proximal end and a distal end, wherein said proximal end of each of said plurality of arms is attached to said housing and wherein said distal end of each of said plurality of arms is attached to said cap; and, a battery contained within said housing providing power to said motor, wherein said device has a first diameter in an undeployed configuration and a second diameter in a deployed configuration, wherein the second diameter is greater than the first diameter, wherein said blades and said arms are positioned against said first shaft when the device is in the undeployed configuration, and wherein said blades expand away from said first shaft and said arms expand away from said first shaft to form a cage surrounding said blades when the device is in said deployed configuration. "