Patents by Inventor Julian A. Shrago

Julian A. Shrago 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).

  • Long life seal and alignment system for small cryocoolers
    Patent number: 8491281
    Abstract: In one embodiment, a compressor includes a motor assembly configured to compress a gas within a compression volume, the motor assembly including: a stationary coil assembly; a moving assembly having at least one magnet, and a gap located between the stationary coil assembly and the moving assembly; wherein the moving assembly is configured to reciprocate axially with respect to the stationary coil assembly when electrical current is applied to the stationary coil assembly, and to change the width of the gap between the stationary coil assembly and the moving assembly so as to provide magnetic axial stiffness against motion of the moving assembly. One or more embodiments may be used in a cryocooler assembly.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: July 23, 2013
    Assignee: Raytheon Company
    Inventors: Robert C Hon, Lowell A Bellis, Julian A Shrago, Carl S. Kirkconnell
  • LONG LIFE SEAL AND ALIGNMENT SYSTEM FOR SMALL CRYOCOOLERS
    Publication number: 20120000208
    Abstract: In one embodiment, a compressor includes a moving assembly configured to compress a gas within a compression volume; a guide rod connected to the moving assembly which reciprocates axially with the moving assembly; and a bellows seal positioned between the moving assembly and a stationary housing which at least partially defining the compression volume. In another embodiment, a compressor includes a motor assembly configured to compress a gas within a compression volume, the motor assembly including: a stationary coil assembly; a moving assembly having at least one magnet, and a gap located between the stationary coil assembly and the moving assembly; wherein the moving assembly is configured to reciprocate axially with respect to the stationary coil assembly when electrical current is applied to the stationary coil assembly, and to change the width of the gap between the stationary coil assembly and the moving assembly so as to provide magnetic axial stiffness against motion of the moving assembly.
    Type: Application
    Filed: July 2, 2010
    Publication date: January 5, 2012
    Applicant: RAYTHEON COMPANY
    Inventors: Robert C. HON, Lowell A. BELLIS, Julian A. SHRAGO, Carl S. KIRKCONNELL
  • Low vibration cryocooler
    Patent number: 7779640
    Abstract: Disclosed are a low vibration cryocooler and a method of reducing vibration in a cryocooler. The cryocooler can be a Stirling class cryocooler includes at least one motor that drives a mass, the motor having a main drive winding and a separate trim winding. A motor controller outputs a main drive signal that is coupled to the main drive winding and a separate vibration reducing signal that is coupled to the trim winding.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: August 24, 2010
    Assignee: Raytheon Company
    Inventors: Kenneth D. Price, Robert C. Hon, Julian A. Shrago, Michael C. Barr, Michael H. Kieffer, Michael J. Ramirez
  • Low vibration cryocooler
    Publication number: 20070056297
    Abstract: Disclosed are a low vibration cryocooler and a method of reducing vibration in a cryocooler. The cryocooler can be a Stirling class cryocooler includes at least one motor that drives a mass, the motor having a main drive winding and a separate trim winding. A motor controller outputs a main drive signal that is coupled to the main drive winding and a separate vibration reducing signal that is coupled to the trim winding.
    Type: Application
    Filed: September 9, 2005
    Publication date: March 15, 2007
    Inventors: Kenneth Price, Robert Hon, Julian Shrago, Michael Barr, Michael Kieffer, Michael Ramirez