Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Heart valve with rectangular orifice










Image Number 4 for United States Patent #6699283.

A mechanical heart valve prosthesis has a generally rectangular orifice and two leaflets that move between a closed position nearly perpendicular to blood flow and an open position nearly parallel to blood flow. Due to the uniform dimension of a rectangle, the leaflets are hinged at the periphery of the orifice, and present a single large central flow region to the blood when opened. The base provides several means of constraining the leaflet rotation during opening and closing.








 
 
  Recently Added Patents
Electrode compositions and processes
Timing phase detection using a matched filter set
Power amplifier
Method for improving uniformity of high-frequency plasma discharge by means of frequency modulation
Few-moded optical fibers
Process cartridge and developing cartridge
Curable resin composition, cured product thereof, phenolic resin, epoxy resin, and semiconductor sealing material
  Randomly Featured Patents
Apparatus and method for grinding a punch
Introgen rejection method
Multiple device management method and system
Hair ring
Fuel injector fixing device for direct injection engine
Pulsed voltage surge resistant magnet wire
Flexible method for producing oil bases and distillates by hydroisomerization-conversion on a weakly dispersed catalyst followed by a catalyctic dewaxing
Locking device for telescoping pole and appliance provided with such a locking device
Method and a device for identifying and neutralizing an undersea mine
Method of producing hollow fiber polymer membranes