Patents by Inventor Joel Gronvall

Joel Gronvall 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).

  • Impeller with external blades
    Patent number: 11598347
    Abstract: A compressor includes a housing, a shaft, and an impeller rotatable relative to the housing by the shaft. The impeller includes a hub, impeller blades, and external blades. The impeller blades extend from a front of the hub. The external blades protrude from a rear surface of the hub or an outer surface of a shroud of the impeller. The external blades are curved along the rear surface or the outer surface. A heat transfer circuit includes a compressor and a working fluid. The compressor includes an impeller having a hub, impeller blades, and external blades.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: March 7, 2023
    Assignee: TRANE INTERNATIONAL INC.
    Inventor: Joel Gronvall
  • IMPELLER WITH EXTERNAL BLADES
    Publication number: 20200408220
    Abstract: A compressor includes a housing, a shaft, and an impeller rotatable relative to the housing by the shaft. The impeller includes a hub, impeller blades, and external blades. The impeller blades extend from a front of the hub. The external blades protrude from a rear surface of the hub or an outer surface of a shroud of the impeller. The external blades are curved along the rear surface or the outer surface. A heat transfer circuit includes a compressor and a working fluid. The compressor includes an impeller having a hub, impeller blades, and external blades.
    Type: Application
    Filed: June 28, 2019
    Publication date: December 31, 2020
    Inventor: Joel Gronvall