Patents by Inventor Christian F. Fradin

Christian F. Fradin 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).

  • Methods and apparatuses for avoiding surging phenomena in compressors
    Patent number: 4205941
    Abstract: The invention relates to a centrifugal compressor comprising an impeller not comprising distributor blading upstream of the impeller, a pressure probe and regulator means controlled by the probe and arranged to act on the flow conditions downstream or upstream of the compressor to avoid the risk of surging. The probe is disposed upstream of the impeller of the compressor and being arranged to detect the critical direction of the absolute velocity of the fluid and to measure the critical value of the radial gradient of the static pressure beyond which the compressor runs the risk of being subjected to surging.
    Type: Grant
    Filed: May 2, 1978
    Date of Patent: June 3, 1980
    Assignee: Office National d'Etudes et de Recherches Aerospatiales (O.N.E.R.A.)
    Inventor: Christian F. Fradin