Patents by Inventor Jeffrey R. Radziunas

Jeffrey R. Radziunas 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).

  • Device and method for separating components of a fluid sample
    Patent number: 6803022
    Abstract: A device and method for separating heavier and lighter fractions of a fluid sample. The device includes a plurality of constituents comprising a container and a composite element in the container. The composite element is a separator comprising a deformable bellows, a ballast mounted to the lower end of the bellows, and a float is engageable with an upper end of the bellows. A fluid sample is delivered to the container and the device is subjected to centrifugation whereby the centrifugal load causes the ballast to move toward the bottom of the tube and causes an elongation and narrowing of the bellows. The separator then moves down the tube and stabilizes in a position between the separated phases of the fluid sample. Termination of the centrifugal load enables the bellows to return to its original condition in sealing engagement with the walls of the tube.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: October 12, 2004
    Assignee: Becton, Dickinson and Company
    Inventors: Paul C. DiCesare, Jeffrey R. Radziunas, Robert Losada, Fu-Chung Lin
  • Device and method for separating components of a fluid sample
    Publication number: 20020094305
    Abstract: A device and method for separating heavier and lighter fractions of a fluid sample. The device includes a plurality of constituents comprising a container and a composite element in the container. The composite element is a separator comprising a deformable bellows, a ballast mounted to the lower end of the bellows, and a float is engageable with an upper end of the bellows. A fluid sample is delivered to the container and the device is subjected to centrifugation whereby the centrifugal load causes the ballast to move toward the bottom of the tube and causes an elongation and narrowing of the bellows. The separator then moves down the tube and stabilizes in a position between the separated phases of the fluid sample. Termination of the centrifugal load enables the bellows to return to its original condition in sealing engagement with the walls of the tube.
    Type: Application
    Filed: November 30, 2000
    Publication date: July 18, 2002
    Inventors: Paul C. Dicesare, Jeffrey R. Radziunas, Robert Losada, Fu-Chung Lin