Patents by Inventor Stefan Pistorius

Stefan Pistorius 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).

  • Pressure sensor with foresighted maintenance control and monitoring for diaphragm fracture and to a method for monitoring for diaphragm fracture
    Patent number: 6776046
    Abstract: A pressure-measuring device with monitoring for diaphragm fracture comprises a housing with a passage whose two openings at the end faces of the housing are closed by a first deformation body and a second deformation body. The passage is completely filled with a transmission liquid in order to transmit the process pressure from the first deformation body to the second deformation body. The device has components for monitoring a material property of the transmission liquid. A change in the material property indicates contamination by the process medium and thus a fracture of the first deformation body. The material property monitored is preferably the relative dielectric constant.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: August 17, 2004
    Assignee: Endress & Hauser GmbH & Co. KG
    Inventor: Stefan Pistorius
  • Pressure sensor and method of operating it
    Publication number: 20030024319
    Abstract: A pressure-measuring device with monitoring for diaphragm fracture comprises a housing (10) with a passage whose two openings at the end faces of the housing (10) are closed by a first deformation body (21) and a second deformation body (22). The passage is completely filled with a transmission liquid in order to transmit the process pressure from the first deformation body (21) to the second deformation body (22). The device comprises means (31, 32) for monitoring a material property of the transmission liquid. A change in the material property indicates contamination by the process medium and thus a fracture of the first deformation body. The material property monitored is preferably the relative dielectric constant.
    Type: Application
    Filed: July 11, 2002
    Publication date: February 6, 2003
    Inventor: Stefan Pistorius