Patents by Inventor Thomas Uehlin

Thomas Uehlin 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).

  • Patent number: 6848318
    Abstract: A pressure sensor that is particularly suitable inter alia for the food industry and the measuring accuracy of which is stable over a long time, having a diaphragm seal (3, 45) with a separating diaphragm (7, 53) on which a pressure (P) to be measured acts and having a ceramic measuring cell (9, 57) which is connected to the diaphragm seal (3, 45) exclusively by inorganic materials, is provided, in which sensor the separating diaphragm (7, 53) and all further sensor components coming into contact during measurement with a medium of which the pressure (P) is to be measured are metallic.
    Type: Grant
    Filed: January 23, 2004
    Date of Patent: February 1, 2005
    Assignee: Endress + Hauser GmbH + Co.
    Inventors: Peter Gerst, Karlheinz Banholzer, Karl Flögel, Thomas Uehlin, Frank Hegner, Elke Schmidt, Ulfert Drewes, Rainer Martin
  • Publication number: 20040149042
    Abstract: A pressure sensor that is particularly suitable inter alia for the food industry and the measuring accuracy of which is stable over a long time, having a diaphragm seal (3, 45) with a separating diaphragm (7, 53) on which a pressure (P) to be measured acts and having a ceramic measuring cell (9, 57) which is connected to the diaphragm seal (3, 45) exclusively by inorganic materials, is provided, in which sensor the separating diaphragm (7, 53) and all further sensor components coming into contact during measurement with a medium of which the pressure (P) is to be measured are metallic.
    Type: Application
    Filed: January 23, 2004
    Publication date: August 5, 2004
    Applicant: ENDRESS + HAUSER GMBH + CO.
    Inventors: Peter Gerst, Karlheinz Banholzer, Karl Flogel, Thomas Uehlin, Frank Hegner, Elke Schmidt, Ulfert Drewes, Rainer Martin
  • Patent number: 6715356
    Abstract: A pressure sensor that is particularly suitable for the food industry and the measuring accuracy of which is stable over a long time, having a diaphragm seal with a separating diaphragm on which a pressure to be measured acts and having a ceramic measuring cell which is connected to the diaphragm seal exclusively by inorganic materials, is provided, in which sensor the separating diaphragm and all further sensor components coming into contact during measurement with a medium of which the pressure is to be measured are metallic.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: April 6, 2004
    Inventors: Peter Gerst, Karlheinz Banholzer, Karl Flögel, Thomas Uehlin, Frank Hegner, Elke Schmidt, Ulfert Drewes, Rainer Martin
  • Publication number: 20040050169
    Abstract: A pressure measurement device, a receiving tube 1, in which a pressure sensor element 3 is axially clamped by means of a screw element 7. Between the screw element 7 and the pressure sensor element 3, a transmission element 4 is arranged to transmit the axial clamping forces. The pressure measurement device exhibits at least one first stop 21, which is not rotatable relative to the receiving tube 1, wherein the transmission element exhibits at least one second stop 41, which is engaged with the at least one first stop, in order to prevent a rotation of the transmission element. In this way, a transmission of torque to the pressure sensor element 3 during assembly is prevented. Preferably the first stop 21 is arranged on a bushing 2 which centers the pressure sensor element 3 in the receiving tube.
    Type: Application
    Filed: October 27, 2003
    Publication date: March 18, 2004
    Inventors: Miroslaw Alznauer, Thomas Uehlin, Frank Gutmann
  • Patent number: 6615665
    Abstract: A pressure measuring device with a housing (21, 53) and a pressure measuring cell is provided, the pressure measuring cell being protected from interference, in particular independently of its installation position in the housing (21, 53), and comprising: a housing (21, 53), a pressure measuring cell, which has at least one pressure-sensitive measuring diaphragm (3, 35, 37), on the outer side of which a pressure (P, P1, P2) acts during operation, which has a transducer for converting a pressure-dependent deflection of the measuring diaphragm (3, 35, 37) into an electrical measured variable and which has free outer circumferential surfaces, which are provided with an electrically conductive coating (31, 61), and an electronic circuit (13, 49) for converting the electrical measured variable into a measuring signal.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: September 9, 2003
    Assignee: Endress + Hauser GmbH + Co.
    Inventors: Karl Flögel, Thomas Uehlin, Frank Hegner, Karlheinz Banholzer
  • Patent number: 6508130
    Abstract: A pressure sensor has a measuring cell, a measuring cell mount and an electronic sensor system connected to the measuring cell. The pressure sensor is designed as a modular unit in which the electronic sensor system and its electric connections are protected against moisture and mechanical loads, in which the electronic sensor system is embedded in a protective cushion, and in which the protective cushion is surrounded by an encapsulation.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: January 21, 2003
    Assignee: Endress and Hauser GmbH + Co.
    Inventors: Thomas Werner, Thomas Uehlin, Karl Flögel
  • Patent number: 6363790
    Abstract: The invention is concerned with a pressure sensor which avoids temperature hysteresis effects caused on account of heat-induced expansions as a result of stresses between a ceramic pressure-measuring cell and a metallic housing. The inventive pressure sensor (100) for determining the pressure of a process medium comprises a metallic housing (110), which is open to a process medium and has a continuous hole (111) for accommodating the ceramic pressure-measuring cell (120), the pressure-measuring cell (120) comprising a ceramic base body (122) and a ceramic diaphragm (121), which is fitted thereon and is exposed to the process medium, and also suitable means (124a, 124b, 130), which supply an electrical signal which can be picked off and corresponds to the process pressure acting on the diaphragm (121).
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: April 2, 2002
    Assignee: Endress + Hauser GmbH + Co.
    Inventors: Karl Flögel, Thomas Uehlin
  • Publication number: 20010015105
    Abstract: A pressure sensor that is particularly suitable inter alia for the food industry and the measuring accuracy of which is stable over a long time, having a diaphragm seal (3, 45) with a separating diaphragm (7, 53) on which a pressure (P) to be measured acts and having a ceramic measuring cell (9, 57) which is connected to the diaphragm seal (3, 45) exclusively by inorganic materials, is provided, in which sensor the separating diaphragm (7, 53) and all further sensor components coming into contact during measurement with a medium of which the pressure (P) is to be measured are metallic.
    Type: Application
    Filed: December 13, 2000
    Publication date: August 23, 2001
    Applicant: Endress + Hauser GmbH + Co.
    Inventors: Peter Gerst, Karlheinz Banholzer, Karl Flogel, Thomas Uehlin, Frank Hegner, Elke Schmidt, Ulfert Drewes, Rainer Martin
  • Publication number: 20010013254
    Abstract: A pressure sensor is specified which has a measuring cell (1, 46), a measuring cell mount (3, 47) and an electronic sensor system (15) connected to the measuring cell (1, 46), and which is designed as a modular unit and in which the electronic sensor system (15) and its electric connections (19) are protected against moisture and mechanical loads, in which the electronic sensor system (15) is embedded in a protective cushion (25), and in which the protective cushion (25) is surrounded by an encapsulation (27).
    Type: Application
    Filed: February 16, 2001
    Publication date: August 16, 2001
    Applicant: Endress and Hauser GmbH+Co.
    Inventors: Thomas Werner, Thomas Uehlin, Karl Flogel