Patents by Inventor Lucas Varela

Lucas Varela has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Prosthetic heart valve
    Patent number: 6723123
    Abstract: A multi-leaflet cardiovascular valve having a generally annular valve body (1) and at least two leaflets (4, 5) mounted within the valve body such that the leaflets rotate around a central axis (11) and a transverse pivoting axis (12) between an open configuration wherein blood is permitted to flow through the annular valve body and a closed configuration wherein blood is prevented from flowing in at least one direction through the annular valve body. During the open configuration, the leaflets rotate around the flow axis.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 20, 2004
    Assignee: Impsa International Incorporated
    Inventors: Lev Kazatchkov, Lucas Varela
  • Hydraulic seal for rotary pumps
    Patent number: 6595743
    Abstract: A rotary blood pump comprising at least one rotor, a housing and at least one conduit in the rotor for conducting a by-passed portion of the blood into a clearance between the rotor and the housing, the portion of blood consisting mostly of plasma without red cells, thus preserving the solid particles and red cells from damage.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: July 22, 2003
    Assignee: IMPSA International Inc.
    Inventors: Lev Kazatchkov, Lucas Varela
  • Continuous flow rotary pump
    Patent number: 6247892
    Abstract: A continuous flow axial-flow pump for impelling a fluid under a continuous pattern without kinetic side effects to minimize and eliminate damage to fluid, the pump comprising two axial adjacent rotors rotating in opposite directions.
    Type: Grant
    Filed: July 26, 1999
    Date of Patent: June 19, 2001
    Assignee: IMPSA International Inc.
    Inventors: Lev Kazatchkov, Lucas Varela