Patents by Inventor Ruiguo Gao

Ruiguo Gao 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).

  • HOUSING ARRANGEMENT FOR REFRIGERANT COMPRESSOR
    Publication number: 20250012489
    Abstract: A housing for a refrigerant compressor may include a first portion made of a metallic material and surrounding moving parts of the refrigerant compressor. The housing may further include a second portion mounted to the first portion and surrounding non-moving, electronic parts of the refrigerant compressor. The second portion is made of a plastic material.
    Type: Application
    Filed: January 31, 2023
    Publication date: January 9, 2025
    Inventors: Sushank THOTAKOORI, Marius DRAGUT, Lin Xiang SUN, Brandon Keith PRITCHARD, Wenchao CAO, Ruiguo GAO, Joshua David FLESCH
  • Step seal for refrigerant compressors
    Patent number: 12146501
    Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.
    Type: Grant
    Filed: May 16, 2023
    Date of Patent: November 19, 2024
    Assignee: Danfoss A/S
    Inventors: James Wilson, Jin Yan, Lin Xiang Sun, Ruiguo Gao, Brenden Richman
  • STEP SEAL FOR REFRIGERANT COMPRESSORS
    Publication number: 20230279865
    Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.
    Type: Application
    Filed: May 16, 2023
    Publication date: September 7, 2023
    Inventors: James Wilson, Jin Yan, Lin Xiang Sun, Ruiguo Gao, Brenden Richman
  • Step seal for refrigerant compressors
    Patent number: 11692557
    Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: July 4, 2023
    Inventors: James Wilson, Jin Yan, Lin Xiang Sun, Ruiguo Gao, Brenden Richman
  • Partially hollow shaft for HVAC compressor
    Patent number: 11434918
    Abstract: This disclosure relates to a compressor having a partially hollow shaft. In particular, an exemplary compressor includes a shaft which is partially hollow, and at least one impeller rotatably coupled to the shaft. The compressor may be a refrigerant compressor used in a heating, ventilation, and air conditioning (HVAC) chiller system.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: September 6, 2022
    Inventors: Zili Sun, Ruiguo Gao, Stefan Walshe, Aida Rezaei, Dongkoo Shin
  • STEP SEAL FOR REFRIGERANT COMPRESSORS
    Publication number: 20220213896
    Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.
    Type: Application
    Filed: December 9, 2021
    Publication date: July 7, 2022
    Inventors: James Wilson, Jin Yan, Lin Xiang Sun, Ruiguo Gao, Brenden Richman
  • 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
  • PARTIALLY HOLLOW SHAFT FOR HVAC COMPRESSOR
    Publication number: 20200400155
    Abstract: This disclosure relates to a compressor having a partially hollow shaft. In particular, an exemplary compressor includes a shaft which is partially hollow, and at least one impeller rotatably coupled to the shaft. The compressor may be a refrigerant compressor used in a heating, ventilation, and air conditioning (HVAC) chiller system.
    Type: Application
    Filed: June 21, 2019
    Publication date: December 24, 2020
    Inventors: Zili Sun, Ruiguo Gao, Stefan Walshe, Aida Rezaei, Dongkoo Shin
  • 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