Patents by Inventor Arnold Martin Schaefer

Arnold Martin Schaefer 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).

  • Integrated connector for multi-stage compressor
    Patent number: 11486618
    Abstract: This disclosure relates to a compressor having at least two compression stages. In particular, an exemplary compressor includes a first radial compression stage arranged along an axis, a second radial compression stage arranged along the axis, and a connector fluidly connecting an outlet of the first radial compression stage to an inlet of the second radial compression stage. The connector has a plurality of sections arranged about the axis. The compressor may be a refrigerant compressor used in a heating, ventilation, and air conditioning (HVAC) chiller system.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: November 1, 2022
    Inventors: Arnold Martin Schaefer, Jin Yan, Alonso Misael Perez
  • Unloading device for HVAC compressor with mixed and radial compression stages
    Patent number: 11143193
    Abstract: A refrigerant compressor according to an exemplary aspect of the present disclosure includes, among other things, an impeller arranged in a main flow path and including a plurality of vanes. The impeller is configured to rotate about an axis. A channel is outside the main flow path. A first orifice fluidly couples the channel to the main flow path upstream of the vanes, and a second orifice fluidly couples the channel to the main flow path downstream of leading edges of the vanes.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: October 12, 2021
    Inventors: Jin Yan, Lin Xiang Sun, Arnold Martin Schaefer, Ruiguo Gao
  • INTEGRATED CONNECTOR FOR MULTI-STAGE COMPRESSOR
    Publication number: 20210108838
    Abstract: This disclosure relates to a compressor having at least two compression stages. In particular, an exemplary compressor includes a first radial compression stage arranged along an axis, a second radial compression stage arranged along the axis, and a connector fluidly connecting an outlet of the first radial compression stage to an inlet of the second radial compression stage. The connector has a plurality of sections arranged about the axis. The compressor may be a refrigerant compressor used in a heating, ventilation, and air conditioning (HVAC) chiller system.
    Type: Application
    Filed: October 11, 2019
    Publication date: April 15, 2021
    Inventors: Arnold Martin Schaefer, Jin Yan, Alonso Misael Perez
  • UNLOADING DEVICE FOR HVAC COMPRESSOR WITH MIXED AND RADIAL COMPRESSION STAGES
    Publication number: 20200208642
    Abstract: A refrigerant compressor according to an exemplary aspect of the present disclosure includes, among other things, an impeller arranged in a main flow path and including a plurality of vanes. The impeller is configured to rotate about an axis. A channel is outside the main flow path. A first orifice fluidly couples the channel to the main flow path upstream of the vanes, and a second orifice fluidly couples the channel to the main flow path downstream of leading edges of the vanes.
    Type: Application
    Filed: July 18, 2019
    Publication date: July 2, 2020
    Inventors: Jin Yan, Lin Xiang Sun, Arnold Martin Schaefer, Ruiguo Gao