Patents by Inventor Robert J. Masarik

Robert J. Masarik 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).

  • Plunger systems
    Patent number: 6984222
    Abstract: The plunger systems for use in an injector-actuated syringe of the present invention include a dynamic wedge seal which improves the sealing engagement between the plunger cover and syringe barrel, and flexible capture members extending from the rear surface of the plunger which permit the engagement and disengagement of the plunger from the injector drive means at any plunger position within the syringe. Further, the plunger systems include a contrast saving tip which expells the injection liquid from the syringe tip.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: January 10, 2006
    Assignee: Medrad, Inc.
    Inventors: Mark W. Hitchins, Edward J. Rhinehart, David M. Reilly, Anthony S. McCoppin, Thomas L. Dufalla, Robert J. Masarik
  • Prefillable syringes and injectors for use therewith
    Patent number: 6322535
    Abstract: The present invention provides prefillable syringes and injectors for use therewith that expand and/or facilitate a variety of medical procedures involving the injection of a liquid medium. In several embodiments, the present syringes and injectors enable the use of current syringe materials at higher pressures than previously attainable or the use of other materials not previously usable with current high pressure-syringe and injector designs. In one embodiment, a syringe comprises an elongated cylindrical main body having a first pair and a second pair of mounting flanges encompassing collectively an arcuate length equal to at least approximately 180° of the circumference of the rear portion of the cylindrical main body for releasably mounting the syringe in a desired position relative to the front wall of the injector housing.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: November 27, 2001
    Assignee: Medrad, Inc.
    Inventors: Mark W. Hitchins, Edward J. Rhinehart, Robert J. Masarik
  • Plunger systems
    Patent number: 6017330
    Abstract: The plunger systems for use in an injector-actuated syringe of the present invention include a dynamic wedge seal which improves the sealing engagement between the plunger cover and syringe barrel, and flexible capture members extending from the rear surface of the plunger which permit the engagement and disengagement of the plunger from the injector drive means at any plunger position within the syringe. Further, the plunger systems include a contrast saving tip which expells the injection liquid from the syringe tip.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: January 25, 2000
    Assignee: Medrad, Inc.
    Inventors: Mark W. Hitchins, Edward J. Rhinehart, David M. Reilly, Anthony S. McCoppin, Thomas L. Dufalla, Robert J. Masarik
  • Prefillable syringes and injectors for use therewith
    Patent number: 5944694
    Abstract: The present invention provides prefillable syringes and injectors for use therewith that expand and/or facilitate a variety of medical procedures involving the injection of a liquid medium. In several embodiments, the present syringes and injectors enable the use of current syringe materials at higher pressures than previously attainable or the use of other materials not previously usable with current high pressure-syringe and injector designs. In one embodiment, a syringe comprises an elongated cylindrical main body having a first pair and a second pair of mounting flanges encompassing collectively an arcuate length equal to at least approximately 180.degree. of the circumference of the rear portion of the cylindrical main body for releasably mounting the syringe in a desired position relative to the front wall of the injector housing.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: August 31, 1999
    Assignee: Medrad, Inc.
    Inventors: Mark W. Hitchins, Edward J. Rhinehart, Robert J. Masarik
  • Plunger systems
    Patent number: 5873861
    Abstract: The plunger systems for use in an injector-actuated syringe of the present invention include a dynamic wedge seal which improves the sealing engagement between the plunger cover and syringe barrel, and flexible capture members extending from the rear surface of the plunger which permit the engagement and disengagement of the plunger from the injector drive means at any plunger position within the syringe. Further, the plunger systems include a contrast saving tip which expells the injection liquid from the syringe tip.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: February 23, 1999
    Assignee: Medrad, Inc.
    Inventors: Mark W. Hitchins, Edward J. Rhinehart, David M. Reilly, Anthony S. McCoppin, Robert J. Masarik