Patents by Inventor Roland E. Jelvestam

Roland E. Jelvestam 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).

  • Device for measuring concentration of particles conveyed by a liquid
    Patent number: 4492868
    Abstract: A measuring device for measuring the concentration of particles in a liquid advanced through a tube (2) includes a transducer where the tube in a measuring zone has an area change implemented such that the pipe wall is kept clean from deposits. Probes (8, 9) are inserted in the tube wall (6, 7) so that the measuring surfaces of the probes are in contact with the liquid and form a part of the tube wall. The measuring device is compensated for temperature by means of a reference apparatus (13, 14) coacting with said probes electrically and mechanically.
    Type: Grant
    Filed: November 4, 1982
    Date of Patent: January 8, 1985
    Inventors: Roland E. Jelvestam, Par-Halan Bergstrom
  • Transmitter for in-line connection by measuring of fluid consistency
    Patent number: D277831
    Type: Grant
    Filed: May 14, 1982
    Date of Patent: March 5, 1985
    Inventors: P/a/ r H. S. Bergstr/o/ m, Roland E. Jelvestam
  • Supersonic transceiver level measure device
    Patent number: D278317
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: April 9, 1985
    Inventor: Roland E. Jelvestam