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
Semiconductor IC including pulse generation logic circuit
Field of view matching in a visual prosthesis
Sacrificial spacer approach for differential source/drain implantation spacers in transistors comprising a high-k metal gate electrode structure
Systems and methods for facilitating communication with foundation fieldbus linking devices
Systems and methods for a signed magnitude adder in one's complement logic
DC/DC converter, power supply circuit, and semiconductor device
Image quality assessment
  Randomly Featured Patents
Accumulator dehydrator
Packer Mill
Variable ratio rotary positioning mechanism and camera dolly steering mechanism embodying same
System and method of measuring low impedances
Redispersible microdenominated cellulose
Protection from excessive heating of components on an object during curing of paint on a localized area of the object
Printing unit incorporating integrated data connector, media supply cartridge and print head assembly
Process for preparing synthetic intermediates of 2-alkynyladenosines and 2-alkynyladenosines
Web based management of host computers in an open protocol network
Method of error correction