Patents by Inventor Helmuth L. Kayan

Helmuth L. Kayan 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).

  • Cannula with improved valve and skin seal
    Patent number: 5324270
    Abstract: A cannula having an elongate rigid tubular member with proximal and distal extremities. A cylindrical housing is secured to the proximal extremity of the tubular member. A duckbill valve assembly is disposed in the cylindrical housing. The valve assembly has a valve member formed of an elastomeric material and having first and second leaflets forming a duckbill-type seal. First and second spring fingers are provided which engage said first and second leaflets and yieldably urge the leaflets into a closed position whereby in the event the leaflets take a permanent set towards an open position, the spring fingers will urge the first and second leaflets into a closed sealing position.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: June 28, 1994
    Assignee: General Surgical Innovations, Inc.
    Inventors: Helmuth L. Kayan, Kenneth H. Mollenauer