公开(公告)号：FI96991C

公开(公告)日：1996-09-25

申请号：FI885292

申请日：1988-11-16

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L20060101 ,  G01L7/08 ,  G01L9/00 ,  G01L9/12 ,  G01L13/00 ,  G01L13/02 ,  G01L9/04

公开(公告)号：HU207160B

公开(公告)日：1993-03-01

申请号：HU346887

申请日：1987-06-12

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L20060101 ,  G01L7/08 ,  G01L9/00 ,  G01L9/12 ,  G01L13/00 ,  G01L13/02 ,  G01L9/04

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.

公开(公告)号：IN169797B

公开(公告)日：1991-12-21

申请号：IN399MA1987

申请日：1987-06-01

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L20060101 ,  G01L9/12 ,  G01L7/08 ,  G01L9/00 ,  G01L13/00 ,  G01L13/02

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.

公开(公告)号：AU610070B2

公开(公告)日：1991-05-16

申请号：AU7544587

申请日：1987-06-12

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L9/12 ,  G01L20060101 ,  G01L7/08 ,  G01L9/00 ,  G01L13/00 ,  G01L13/02 ,  G01L9/04 ,  F16J3/02

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.

公开(公告)号：FI96991B

公开(公告)日：1996-06-14

申请号：FI885292

申请日：1988-11-16

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L20060101 ,  G01L7/08 ,  G01L9/00 ,  G01L9/12 ,  G01L13/00 ,  G01L13/02 ,  G01L9/04

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.

公开(公告)号：MX163905B

公开(公告)日：1992-06-30

申请号：MX693787

申请日：1987-06-15

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L20060101 ,  G01L7/08 ,  G01L9/12 ,  G01L9/00 ,  G01L13/00 ,  G01L13/02 ,  G01L9/04

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.

公开(公告)号：DK106088A

公开(公告)日：1988-02-29

申请号：DK106088

申请日：1988-02-29

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L9/12 ,  G01L20060101 ,  G01L7/08 ,  G01L9/00 ,  G01L13/00 ,  G01L13/02 ,  G01L9/04

Abstract: A cell for recording differential pressures has a single brittle material diaphragm 63, 93, 102 mounted on support plates 50, 75, 120, 130 positioned on opposite sides of the diaphragm 63, 93, 102. The diaphragm surfaces 43C, 77C, 102A, 102C are, when zero differential pressure prevails on the support plate 50, 75, 120, 130, concave and shaped to conform very closely to the shape the diaphragm 63, 93, 102 has when it is deflected so that when the diaphragm 63, 93, 102 is under a selected pressure and it is forced against one of the support plates 50, 75, 120, 130 in either direction, the diaphragm 63, 93, 102 is substantially planar and supported fully on its support plate 50, 75, 120, 130. The diaphragm 63, 93, 102 may be shaped by placing it under a pressure so that it bows or deflects and then grinding the surface 43C, 77C opposite from the applied pressure flat. When the pressure is removed, the diaphragm 63, 93, 102 relaxes and the exact required shape is produced on the surface 43C, 77C, 102A that had been bowed out and ground flat. The same procedure can be applied to the other side 102C of the diaphragm 102 or two diaphragm sections 43, 43; 77, 77 may be fixed together.

公开(公告)号：DE3751546T2

公开(公告)日：1996-02-22

申请号：DE3751546

申请日：1987-06-12

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L9/12 ,  G01L20060101 ,  G01L7/08 ,  G01L9/00 ,  G01L13/00 ,  G01L13/02 ,  G01L9/04

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.

公开(公告)号：NO173074B

公开(公告)日：1993-07-12

申请号：NO880675

申请日：1988-02-16

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  BRUESEHOFF STEVEN M ,  FRICK ROGER L

IPC: G01L20060101 ,  G01L9/12 ,  G01L7/08 ,  G01L9/00 ,  G01L13/00 ,  G01L13/02

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.

公开(公告)号：ES2006189A6

公开(公告)日：1989-04-16

申请号：ES8701890

申请日：1987-06-29

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  FRICK ROGER L ,  BRUESEHOFF STEVEN M

IPC: G01L20060101 ,  G01L9/12 ,  G01L7/08 ,  G01L9/00 ,  G01L13/00 ,  G01L13/02 ,  G05D15/00

Abstract: DETECTOR PARA PERCIBIR PRESIONES DIFERENCIALES EN FLUIDOS Y DIAFRAGMA PARA EL MISMO, EN DONDE EL DETECTOR COMPRENDE UN PAR DE ENTRADAS CON SENDAS ABERTURAS PARA TRANSMITIR PRESIONES DE FLUIDO, UN DIAFRAGMA UNICO DE MATERIAL NO DUCTIL, DOTADO DE UNA REGION FLEXIONABLE POR EFECTO DE LA PRESION Y MONTADO SOBRE PLACAS DE SOPORTE SITUADAS EN CARAS OPUESTAS DEL MISMO, Y UN SENSOR PARA PERCIBIR LA FLEXION DEL DIAFRAGMA Y SUMINISTRAR UNA SALIDA INDICATIVA DE DICHA PRESION. EL DIAFRAGMA TIENE UN REBORDE EXTERIOR QUE LIMITA DICHA REGION FLEXIONABLE Y QUE SE PEGA HERMETICAMENTE A DICHAS PLACAS DE SOPORTE PARA RODEAR A DICHAS ABERTURAS, SIENDO CONCAVA AL MENOS UNA DE LAS SUPERFICIES DEL DIAFRAGMA. EL INVENTO ES APLICABLE A CELULAS DE MEDIDA DE PRESION DIFERENCIAL PROTEGIDAS CONTRA LA ACCION DE SOBREPRESIONES.