Patents by Inventor Eric Seitz

Eric Seitz 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).

  • MULTIPLE ROTARY VALVE FOR PULSE TUBE REFRIGERATOR
    Publication number: 20150001428
    Abstract: A rotary disc valve unit and refrigerators containing a rotary disc valve unit that has multiple valves, in which at least one rotary valve has ports connecting to the regenerator and at least one rotary valve has ports connecting to the warm ends of one or more pulse tubes where the rotary valve with ports for the regenerator has lighter contact than the rotary valve with ports for the pulse tubes. The valve face is divided into an inner area with ports for the pulse tubes and an outer area with ports for the regenerator, the inner area having a greater sealing pressure than the outer area.
    Type: Application
    Filed: September 16, 2014
    Publication date: January 1, 2015
    Inventors: Mingyao XU, Eric SEITZ
  • Reduced torque valve for cryogenic refrigerator
    Patent number: 7654096
    Abstract: A rotary valve unit which reduces the torque required to turn the valve disc, and the amount of wear dust that is blown into the cold head, using differential gas forces to keep the valve disc in contact with the valve seat, and which enables larger diameter valve discs to be utilized for multi-ported pulse tubes that have less force on the face of the valve disc, resulting in reduced torque and reduced wear rate.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: February 2, 2010
    Assignees: Sumitomo Heavy Industries, Ltd., Sumitomo (SHI) Cryogenics of America, Inc.
    Inventors: Mingyao Xu, Jin Lin Gao, Eric Seitz, Motokazu Saito
  • Wearless valve for cryorefrigerator
    Patent number: 7631505
    Abstract: An improved method of reducing wear dust and torque required to turn a multi-port rotary disc valve utilizes a thrust bearing to hold the valve seat and/or valve disc such that they are not in contact with each other, or have light contact each other.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: December 15, 2009
    Assignees: Sumitomo Heavy Industries, Ltd., Sumitomo (SHI) Cryogenics of America, Inc.
    Inventors: Eric Seitz, Jin Lin Gao, Ralph C. Longsworth, Mingyao Xu
  • MULTIPLE ROTARY VALVE FOR PULSE TUBE REFRIGERATOR
    Publication number: 20080295525
    Abstract: A rotary disc valve unit and refrigerators containing a rotary disc valve unit that has multiple valves, in which at least one rotary valve has ports connecting to the regenerator and at least one rotary valve has ports connecting to the warm ends of one or more pulse tubes where the rotary valve with ports for the regenerator has lighter contact than the rotary valve with ports for the pulse tubes. The valve face is divided into an inner area with ports for the pulse tubes and an outer area with ports for the regenerator, the inner area having a greater sealing pressure than the outer area.
    Type: Application
    Filed: August 12, 2008
    Publication date: December 4, 2008
    Inventors: Mingyao Xu, Eric Seitz
  • Multiple Rotary Valve For Pulse Tube Refrigerator
    Publication number: 20080245077
    Abstract: A rotary disc valve unit and refrigerators containing a rotary disc valve unit that has multiple valves, in which at least one rotary valve has ports connecting to the regenerator and at least one rotary valve has ports connecting to the warm ends of one or more pulse tubes where the rotary valve with ports for the regenerator has lighter contact than the rotary valve with ports for the pulse tubes. The valve face is divided into an inner area with ports for the pulse tubes and an outer area with ports for the regenerator, the inner area having a greater sealing pressure than the outer area.
    Type: Application
    Filed: June 10, 2005
    Publication date: October 9, 2008
    Applicants: SUMITOMO HEAVY INDUSTRIES, LTD., SHI-APD CRYOGENICS, INC.
    Inventors: Mingyao Xu, Eric Seitz
  • Reduced torque valve for cryogenic refrigerator
    Publication number: 20070119188
    Abstract: A rotary valve unit which reduces the torque required to turn the valve disc, and the amount of wear dust that is blown into the cold head, using differential gas forces to keep the valve disc in contact with the valve seat, and which enables larger diameter valve discs to be utilized for multi-ported pulse tubes that have less force on the face of the valve disc, resulting in reduced torque and reduced wear rate.
    Type: Application
    Filed: January 20, 2005
    Publication date: May 31, 2007
    Inventors: Mingyao Xu, Jin Gao, Eric Seitz, Motokazu Saito
  • Wearless valve for cryorefrigerator
    Publication number: 20070107442
    Abstract: An improved method of reducing wear dust and torque required to turn a multi-port rotary disc valve utilizes a thrust bearing to hold the valve seat and/or valve disc such that they are not in contact with each other, or have light contact each other.
    Type: Application
    Filed: March 8, 2005
    Publication date: May 17, 2007
    Inventors: Eric Seitz, Jin Gao, Ralph Longsworth, Mingyao Xu