Patents by Inventor Eric E-Lee Chang

Eric E-Lee Chang 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).

  • Patent number: 11644081
    Abstract: A vibration isolator, system, and method for minimizing propagation of vibrations between structures are configured to decouple axial and lateral structural modes. The vibration isolator includes an axial flexural support that provides axial compliance relative to a central axis and a lateral elastomeric support that provides lateral compliance relative to the central axis. The axial flexural support and the lateral elastomeric support provide stiffness about the central axis. The vibration isolator includes a first mount coupled to a first external structure and a second mount coupled to a second external structure. The axial flexural support is coupled to the first mount and the lateral elastomeric support is coupled to the second mount and the axial flexural support. Using an axial flexural support and a lateral elastomeric support enables tuning of the structural modes in one axis while minimizing the effects to the structural modes in the orthogonal axes.
    Type: Grant
    Filed: November 11, 2021
    Date of Patent: May 9, 2023
    Assignee: Raytheon Company
    Inventors: Emmanuel Fierro, Eric E-Lee Chang, Kirk A. Miller
  • Publication number: 20220235845
    Abstract: A vibration isolator, system, and method for minimizing propagation of vibrations between structures are configured to decouple axial and lateral structural modes. The vibration isolator includes an axial flexural support that provides axial compliance relative to a central axis and a lateral elastomeric support that provides lateral compliance relative to the central axis. The axial flexural support and the lateral elastomeric support provide stiffness about the central axis. The vibration isolator includes a first mount coupled to a first external structure and a second mount coupled to a second external structure. The axial flexural support is coupled to the first mount and the lateral elastomeric support is coupled to the second mount and the axial flexural support. Using an axial flexural support and a lateral elastomeric support enables tuning of the structural modes in one axis while minimizing the effects to the structural modes in the orthogonal axes.
    Type: Application
    Filed: November 11, 2021
    Publication date: July 28, 2022
    Inventors: Emmanuel Fierro, Eric E-Lee Chang, Kirk A. Miller
  • Patent number: 11313433
    Abstract: A shock isolator assembly comprises a base a platform and a plurality of self-resetting buckling isolators providing a three-stage response to a dynamic load acting between the base and the platform. The three-stage response of the self-resetting buckling isolators comprises a tension stage when the dynamic load exceeds a threshold tension load, a compression stage when the dynamic load exceeds a threshold compression load, and a rigid stage when the dynamic load is below the threshold tension load and the threshold compression load.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: April 26, 2022
    Assignee: Raytheon Company
    Inventor: Eric E-Lee Chang
  • Publication number: 20210215223
    Abstract: A shock isolator assembly comprises a base a platform and a plurality of self-resetting buckling isolators providing a three-stage response to a dynamic load acting between the base and the platform. The three-stage response of the self-resetting buckling isolators comprises a tension stage when the dynamic load exceeds a threshold tension load, a compression stage when the dynamic load exceeds a threshold compression load, and a rigid stage when the dynamic load is below the threshold tension load and the threshold compression load.
    Type: Application
    Filed: May 18, 2020
    Publication date: July 15, 2021
    Inventor: Eric E-Lee Chang
  • Patent number: 10816056
    Abstract: A vibration isolation device includes flexures and a multi-part mounting interface for coupling a frame that supports equipment to a structure. The flexures may include three pairs of flexures that allow movement in three orthogonal directions, to allow compliance and/or damp vibrations in the three directions. The flexures may surround the multi-part mounting interface, the parts of which are configured to move relative to one another. One of the parts of the mounting interfaces passes through another part of the mounting interface, such as in one or more holes in one of the interfaces. The device allows equipment mounted on the frame to be isolated from some or all of vibrations produced at the structure. In an example embodiment the vibration isolation system is used in mounting an optical sensor or device to an aircraft.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: October 27, 2020
    Assignee: Raytheon Company
    Inventors: Eric E-Lee Chang, Emmanuel Fierro, Kirk A. Miller, Richard L. Scott
  • Publication number: 20190162268
    Abstract: A vibration isolation device includes flexures and a multi-part mounting interface for coupling a frame that supports equipment to a structure. The flexures may include three pairs of flexures that allow movement in three orthogonal directions, to allow compliance and/or damp vibrations in the three directions. The flexures may surround the multi-part mounting interface, the parts of which are configured to move relative to one another. One of the parts of the mounting interfaces passes through another part of the mounting interface, such as in one or more holes in one of the interfaces. The device allows equipment mounted on the frame to be isolated from some or all of vibrations produced at the structure. In an example embodiment the vibration isolation system is used in mounting an optical sensor or device to an aircraft.
    Type: Application
    Filed: November 29, 2017
    Publication date: May 30, 2019
    Inventors: Eric E-Lee CHANG, Emmanuel Fierro, Kirk A. Miller, Richard L. Scott
  • Patent number: 5720183
    Abstract: A water trap cup for use in connection with a drain tube in a refrigerator is described. In one embodiment, the water trap cup includes a bottom wall and a side wall extending from the bottom wall. The side wall includes retaining webs configured for retaining an end of the drain tube within the water trap cup, and a bottom stop extends from the side wall and maintains the drain tube end spaced from the bottom wall so that a seal is not formed between the bottom wall and the drain tube. The retaining webs generally define a first chamber and a second chamber, and the first and second chambers are in fluid communication. To assemble the water trap cup to the drain tube, the first chamber is aligned with the tube, and the cup is pushed upward into engagement with the drain tube until the drain tube end contacts the bottom stop.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: February 24, 1998
    Assignee: General Electric Company
    Inventor: Eric E-Lee Chang