Patents by Inventor Carl D. Harr

Carl D. Harr 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).

  • VARIABLE RATE LIQUID SPRING SUSPENSION SYSTEM EXHIBITING LOW VARIANCE IN SUSPENSION FREQUENCY
    Publication number: 20240100902
    Abstract: A suspension system configured to exhibit low variance in vehicle ride frequency over a large range of vehicle loads. The suspension system includes a strut having a cylinder and a piston configured to reciprocate in the cylinder. The suspension system also includes a vessel coupled to the strut, and a valve in an interior chamber of the vessel. The valve divides the interior chamber into a first liquid volume and a second liquid volume. The suspension system also includes a hydraulic accumulator having a volume and a liquid volume. The suspension system further includes a compressible liquid in the cylinder, the first liquid volume in the vessel, and the second liquid volume in the vessel, and a spring element in the volume of the hydraulic accumulator.
    Type: Application
    Filed: June 14, 2023
    Publication date: March 28, 2024
    Inventors: Dean F. Bartolone, David L. Nagreski, Carl D. Harr, Aaron Gebhardt
  • Variable rate liquid spring suspension system exhibiting low variance in suspension frequency
    Patent number: 11738619
    Abstract: A suspension system configured to exhibit low variance in vehicle ride frequency over a large range of vehicle loads. The suspension system includes a strut having a cylinder and a piston configured to reciprocate in the cylinder. The suspension system also includes a vessel coupled to the strut, and a valve in an interior chamber of the vessel. The valve divides the interior chamber into a first liquid volume and a second liquid volume. The suspension system also includes a hydraulic accumulator having a volume and a liquid volume. The suspension system further includes a compressible liquid in the cylinder, the first liquid volume in the vessel, and the second liquid volume in the vessel, and a spring element in the volume of the hydraulic accumulator.
    Type: Grant
    Filed: September 28, 2022
    Date of Patent: August 29, 2023
    Assignee: LIQUIDSPRING TECHNOLOGIES, INC.
    Inventors: Dean F. Bartolone, David L. Nagreski, Carl D. Harr, Aaron Gebhardt