Patents by Inventor Daniel C. H. Yang

Daniel C. H. Yang 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).

  • TECHNIQUE FOR APEX-SEAL PROFILE DESIGN
    Publication number: 20150240638
    Abstract: A method for designing an apex seal, a rotor housing, and a rotor includes defining a rotor radius describing a distance between a rotor housing and a specified point within a rotor pitch curve p1, defining a switch angle describing a portion of an apex seal of the rotor to contact the rotor (START) housing, and identifying a generating curve g1 from the rotor radius and the switch angle. A conjugate curve g2 represents an envelope of patterns traced by the generating curve g1 as the rotor pitch curve p1 is moved along a housing pitch curve p2. A rotor flank curve g3 represents an inside envelope of patterns traced by the conjugate curve g2 as the housing pitch curve p2 is moved along the rotor pitch curve p1. Curves g1, g2, and g3 may represent profiles of an apex seal, a rotor housing, and a rotor, respectively.
    Type: Application
    Filed: August 28, 2013
    Publication date: August 27, 2015
    Applicant: The Regents of The University of California
    Inventors: Daniel C. H. Yang, Sarah Warren Rose
  • Lobe pump system and method of manufacture
    Patent number: 8323011
    Abstract: A method of manufacturing a rotor to be used in a dual-rotor lobe pump system for pumping a material at a periodic rate is provided. The method includes selecting a desired periodic flow rate for the material, selecting a number of lobes for the rotor, and selecting either a thickness of the rotor or a spacing between the dual-rotors' axes of rotation in the lobe pump. The method also includes determining the profile for the rotor based on the desired periodic flow rate, so that when the rotor is operated within the dual-rotor lobe pump system, the material can be pumped at substantially the desired periodic flow rate. In another embodiment of the invention, a lobe pump rotor profile is formed by the method described above.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: December 4, 2012
    Assignee: The Regents of the University of California
    Inventors: Daniel C. H. Yang, Shih-Hsi Tong
  • Lobe pump system and method of manufacture
    Patent number: 7553143
    Abstract: A method of manufacturing a rotor to be used in a dual-rotor lobe pump system for pumping a material at a periodic rate is provided. The method includes selecting a desired periodic flow rate for the material, selecting a number of lobes for the rotor, and selecting either a thickness of the rotor or a spacing between the dual-rotors' axes of rotation in the lobe pump. The method also includes determining the profile for the rotor based on the desired periodic flow rate, so that when the rotor is operated within the dual-rotor lobe pump system, the material can be pumped at substantially the desired periodic flow rate. In another embodiment of the invention, a lobe pump rotor profile is formed by the method described above.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: June 30, 2009
    Assignee: The Regents of the University of California
    Inventors: Daniel C. H. Yang, Shih-Hsi Tong