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公开(公告)号：BR8907728A
公开(公告)日：1991-07-30
申请号：BR8907728
申请日：1989-10-17
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , NAUMAAN AHMED , RUD STANLEY E JR
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公开(公告)号：FI885292A
公开(公告)日：1988-11-16
申请号：FI885292
申请日：1988-11-16
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , FRICK ROGER L , BRUESEHOFF STEVEN M
Abstract: A cell for sensing differential pressures has a single brittle material diaphragm mounted on support plates positioned on opposite sides of the diaphragm. The diaphragm surfaces when at zero differential pressure facing the support are concave and shaped to conform very closely to the shape the diaphragm has when it is deflected so that when the diaphragm is under a selected pressure and it is forced against one of the supports in either direction, the diaphragm is substantially planar or flat and supported fully on its support plate. The diaphragm may be shaped by placing it under a pressure so that it bows or deflects and then grinding the surface opposite from the applied pressure flat. When the pressure is removed, the diaphragm relaxes and a cavity with the exact required shape is produced on the surface that had been bowed out and ground flat. The same procedure can be done to the other side of the diaphragm or two diaphragm sections may be fixed together.
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公开(公告)号：NO880675L
公开(公告)日：1988-02-16
申请号：NO880675
申请日：1988-02-16
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , BRUESEHOFF STEVEN M , FRICK ROGER L
Abstract: A cell for sensing differential pressures has a single brittle material diaphragm mounted on support plates positioned on opposite sides of the diaphragm. The diaphragm surfaces when at zero differential pressure facing the support are concave and shaped to conform very closely to the shape the diaphragm has when it is deflected so that when the diaphragm is under a selected pressure and it is forced against one of the supports in either direction, the diaphragm is substantially planar or flat and supported fully on its support plate. The diaphragm may be shaped by placing it under a pressure so that it bows or deflects and then grinding the surface opposite from the applied pressure flat. When the pressure is removed, the diaphragm relaxes and a cavity with the exact required shape is produced on the surface that had been bowed out and ground flat. The same procedure can be done to the other side of the diaphragm or two diaphragm sections may be fixed together.
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公开(公告)号：NO880675D0
公开(公告)日：1988-02-16
申请号：NO880675
申请日：1988-02-16
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , BRUESEHOFF STEVEN M , FRICK ROGER L
Abstract: A cell for sensing differential pressures has a single brittle material diaphragm mounted on support plates positioned on opposite sides of the diaphragm. The diaphragm surfaces when at zero differential pressure facing the support are concave and shaped to conform very closely to the shape the diaphragm has when it is deflected so that when the diaphragm is under a selected pressure and it is forced against one of the supports in either direction, the diaphragm is substantially planar or flat and supported fully on its support plate. The diaphragm may be shaped by placing it under a pressure so that it bows or deflects and then grinding the surface opposite from the applied pressure flat. When the pressure is removed, the diaphragm relaxes and a cavity with the exact required shape is produced on the surface that had been bowed out and ground flat. The same procedure can be done to the other side of the diaphragm or two diaphragm sections may be fixed together.
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25.发明专利
公开(公告)号：RU2069328C1
公开(公告)日：1996-11-20
申请号：SU4613103
申请日：1987-06-12
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , FRICK ROGER L , BRUESEHOFF STEVEN M
Abstract: A cell for sensing differential pressures has a single brittle material diaphragm mounted on support plates positioned on opposite sides of the diaphragm. The diaphragm surfaces when at zero differential pressure facing the support are concave and shaped to conform very closely to the shape the diaphragm has when it is deflected so that when the diaphragm is under a selected pressure and it is forced against one of the supports in either direction, the diaphragm is substantially planar or flat and supported fully on its support plate. The diaphragm may be shaped by placing it under a pressure so that it bows or deflects and then grinding the surface opposite from the applied pressure flat. When the pressure is removed, the diaphragm relaxes and a cavity with the exact required shape is produced on the surface that had been bowed out and ground flat. The same procedure can be done to the other side of the diaphragm or two diaphragm sections may be fixed together.
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Patent Agency Ranking
公开(公告)号：DE3751546D1
公开(公告)日：1995-11-02
申请号：DE3751546
申请日：1987-06-12
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , FRICK ROGER L , BRUESEHOFF STEVEN M
Abstract: A cell for sensing differential pressures has a single brittle material diaphragm mounted on support plates positioned on opposite sides of the diaphragm. The diaphragm surfaces when at zero differential pressure facing the support are concave and shaped to conform very closely to the shape the diaphragm has when it is deflected so that when the diaphragm is under a selected pressure and it is forced against one of the supports in either direction, the diaphragm is substantially planar or flat and supported fully on its support plate. The diaphragm may be shaped by placing it under a pressure so that it bows or deflects and then grinding the surface opposite from the applied pressure flat. When the pressure is removed, the diaphragm relaxes and a cavity with the exact required shape is produced on the surface that had been bowed out and ground flat. The same procedure can be done to the other side of the diaphragm or two diaphragm sections may be fixed together.
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公开(公告)号：CA1311365C
公开(公告)日：1992-12-15
申请号：CA538825
申请日：1987-06-04
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , RUF JAMES , SCHULTE JOHN P
Abstract: A pressure transducer has a stress isolator layer which permits the sensor to be non-resiliently mounted (hard mounted) to a mounting surface that in turn is subjected to strain. The strain of the mounting surface tends to induce undesired stress in the sensing diaphragm, and the present stress isolator layer minimizes the amount of stress that is transferred to the measuring diaphragm, to thereby reduce error. The spring preferably comprises a silicon leaf-type spring, with or without isolating slots, and is used in various combinations of diaphragms that are sensitive to pressure. The deflection of the diaphragm in response to pressure can be measured in any desired known manner such as with strain gage resistors, or through capacitive sensing.
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公开(公告)号：HUT52243A
公开(公告)日：1990-06-28
申请号：HU346887
申请日：1987-06-12
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , FRICK ROGER L , BRUESEHOFF STEVEN M
Abstract: A cell for sensing differential pressures has a single brittle material diaphragm mounted on support plates positioned on opposite sides of the diaphragm. The diaphragm surfaces when at zero differential pressure facing the support are concave and shaped to conform very closely to the shape the diaphragm has when it is deflected so that when the diaphragm is under a selected pressure and it is forced against one of the supports in either direction, the diaphragm is substantially planar or flat and supported fully on its support plate. The diaphragm may be shaped by placing it under a pressure so that it bows or deflects and then grinding the surface opposite from the applied pressure flat. When the pressure is removed, the diaphragm relaxes and a cavity with the exact required shape is produced on the surface that had been bowed out and ground flat. The same procedure can be done to the other side of the diaphragm or two diaphragm sections may be fixed together.
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29.发明专利
公开(公告)号：CA2001047A1
公开(公告)日：1990-04-20
申请号：CA2001047
申请日：1989-10-19
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , NAUMAAN AHMED , RUD STANLEY E JR
Abstract: SOLID STATE DIFFERENTIAL PRESSURE SENSOR WITH OVERPRESSURE STOP AND FREE EDGE CONSTRUCTION A solid state pressure sensor utilizes a brittle diaphragm made of a material such as silicon, which is mounted between base plates of glass, and which deflects in response to pressure. The base plates of glass can have recesses formed therein to receive the diaphragm and provide a full support across the diaphragm under overpressure conditions to prevent overstressing the diaphragm, or the diaphragm can have such contoured surfaces for forming overpressure stop surfaces against the facing base plate. The diaphragm has grooves defining a central portion that deflects, and whereby the grooves will form webs joining the central portion to an outer rim so that the diaphragm acts similarly to a "free edge" diaphragm in its deflection characteristics. The grooves defining the webs can have various configurations for achieving the results desired.
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公开(公告)号：BR8707739A
公开(公告)日：1989-08-15
申请号：BR8707739
申请日：1987-06-12
Applicant: ROSEMOUNT INC
Inventor： KNECHT THOMAS A , FRICK ROGER L , BRUESEHOFF STEVEN M
Abstract: A cell for sensing differential pressures has a single brittle material diaphragm mounted on support plates positioned on opposite sides of the diaphragm. The diaphragm surfaces when at zero differential pressure facing the support are concave and shaped to conform very closely to the shape the diaphragm has when it is deflected so that when the diaphragm is under a selected pressure and it is forced against one of the supports in either direction, the diaphragm is substantially planar or flat and supported fully on its support plate. The diaphragm may be shaped by placing it under a pressure so that it bows or deflects and then grinding the surface opposite from the applied pressure flat. When the pressure is removed, the diaphragm relaxes and a cavity with the exact required shape is produced on the surface that had been bowed out and ground flat. The same procedure can be done to the other side of the diaphragm or two diaphragm sections may be fixed together.
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