Patents by Inventor Lowell Kleven
Lowell Kleven 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).
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Patent number: 9945819Abstract: A transducer assembly includes an acoustic sensor element and an acoustic waveguide. The acoustic waveguide includes a rotatable acoustic coupler, a tube, and a foot. The foot has a mounting surface that is mountable on a fluid conduit. A circuit assembly couples to acoustic sensor element and provides a diagnostic output.Type: GrantFiled: August 11, 2014Date of Patent: April 17, 2018Assignee: Rosemount Inc.Inventor: Lowell A. Kleven
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Patent number: 9217653Abstract: A process transmitter includes at least one sensor which monitors a process variable, and analog-to-digital (A/D) converter circuitry coupled to the at least one sensor and configured to provide process variable data indicative of process variable values. A digital signal processor (DSP) is coupled to the A/D converter circuitry to receive the process variable data. The DSP comprises a co-processor configured to receive and perform calculations on the process variable data from the A/D converter circuitry to generate output data. Communications circuitry of the process transmitter is configured either to control communication over loop wiring which can be coupled to the process transmitter, or to control wireless communications with the process transmitter. A microprocessor, separate from the co-processor of the DSP, is coupled between the co-processor and the communications circuitry to control movement of the output data from the DSP to the communications circuitry.Type: GrantFiled: September 13, 2007Date of Patent: December 22, 2015Assignee: Rosemount Inc.Inventors: Lowell A. Kleven, John P. Schulte
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Patent number: 9188489Abstract: A sensor tube for protecting a sensor inserted into a moving process fluid is provided. The sensor tube includes a process interface section for mounting to a process vessel and an extended section extending from the process interface section to a sealed end. The extended section includes a twisted section having a longitudinal axis. The process interface section and the extended section define a sensor bore configured to receive a sensor therein. The twisted section has a cross section that includes at least three equally sized walls and wherein the walls form helixes along the longitudinal axis of the twisted section.Type: GrantFiled: June 29, 2012Date of Patent: November 17, 2015Assignee: Rosemount Inc.Inventor: Lowell A. Kleven
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Publication number: 20140352435Abstract: A transducer assembly includes an acoustic sensor element and an acoustic waveguide. The acoustic waveguide includes a rotatable acoustic coupler, a tube, and a foot. The foot has a mounting surface that is mountable on a fluid conduit. A circuit assembly couples to acoustic sensor element and provides a diagnostic output.Type: ApplicationFiled: August 11, 2014Publication date: December 4, 2014Inventor: Lowell A. Kleven
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Patent number: 8849589Abstract: A process fluid flow device includes a power supply module, a process communication module, a processor and measurement circuitry. The process communication circuitry is coupled to the power supply module and to the processor. The measurement circuitry is operably coupleable to plurality of process variable sensors to obtain an indication of differential pressure, static pressure and process fluid temperature. The processor is configured to compute process fluid mass flow, and to use the static pressure and process fluid temperature to obtain an energy per unit mass value relative to the process fluid and to provide an energy flow indication.Type: GrantFiled: May 22, 2009Date of Patent: September 30, 2014Assignee: Rosemount Inc.Inventors: David E. Wiklund, Lowell A. Kleven
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Patent number: 8800373Abstract: A transducer assembly includes an acoustic sensor element and an acoustic waveguide. The acoustic waveguide includes a rotatable acoustic coupler, a tube, and a foot. The foot has a mounting surface that is mountable on a fluid conduit. A circuit assembly couples to acoustic sensor element and provides a diagnostic output.Type: GrantFiled: February 14, 2011Date of Patent: August 12, 2014Assignee: Rosemount Inc.Inventor: Lowell A. Kleven
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Patent number: 8655604Abstract: A process fluid flow device includes process communication circuitry, a processor, and measurement circuitry. The process communication circuitry is configured to communicate with at least one additional process device. The processor is coupled to the process communication circuitry and is configured to execute instructions to provide a plurality of cycles, wherein each cycle includes a number of flow-related calculations. Measurement circuitry is operably coupleable to a plurality of process variable sensors to obtain an indication of differential pressure during each cycle, and to obtain static pressure, and process fluid temperature. The processor is configured to compute a process fluid flow value using a current differential pressure sensor indication and at least one flow-related value calculated during a previous cycle. The process communication circuitry communicates the computed process fluid flow value to the at least one additional process device.Type: GrantFiled: October 27, 2009Date of Patent: February 18, 2014Assignee: Rosemount Inc.Inventors: Lowell A. Kleven, David E. Wiklund
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Publication number: 20130142216Abstract: A sensor tube for protecting a sensor inserted into a moving process fluid is provided. The sensor tube includes a process interface section for mounting to a process vessel and an extended section extending from the process interface section to a sealed end. The extended section includes a twisted section having a longitudinal axis. The process interface section and the extended section define a sensor bore configured to receive a sensor therein. The twisted section has a cross section that includes at least three equally sized walls and wherein the walls form helixes along the longitudinal axis of the twisted section.Type: ApplicationFiled: June 29, 2012Publication date: June 6, 2013Applicant: Rosemount Inc.Inventor: Lowell A. Kleven
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Publication number: 20120204650Abstract: A transducer assembly includes an acoustic sensor element and an acoustic waveguide. The acoustic waveguide includes a rotatable acoustic coupler, a tube, and a foot. The foot has a mounting surface that is mountable on a fluid conduit. A circuit assembly couples to acoustic sensor element and provides a diagnostic output.Type: ApplicationFiled: February 14, 2011Publication date: August 16, 2012Inventor: Lowell A. Kleven
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Patent number: 7724001Abstract: A circuit that senses a process variable includes a voltage divider that includes first and second capacitances. At least one of the capacitances is varied by the process variable. Divider ends receive modulated potentials, and a divider center tap coupled to a detector. The detector has a detector output representing carrier frequency range components. A control circuit controls a baseband envelope of the modulated potentials as a function of the detector output.Type: GrantFiled: March 26, 2007Date of Patent: May 25, 2010Assignee: Rosemount Inc.Inventor: Lowell A. Kleven
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Publication number: 20100106433Abstract: A process fluid flow device includes process communication circuitry, a processor, and measurement circuitry. The process communication circuitry is configured to communicate with at least one additional process device. The processor is coupled to the process communication circuitry and is configured to execute instructions to provide a plurality of cycles, wherein each cycle includes a number of flow-related calculations. Measurement circuitry is operably coupleable to a plurality of process variable sensors to obtain an indication of differential pressure during each cycle, and to obtain static pressure, and process fluid temperature. The processor is configured to compute a process fluid flow value using a current differential pressure sensor indication and at least one flow-related value calculated during a previous cycle. The process communication circuitry communicates the computed process fluid flow value to the at least one additional process device.Type: ApplicationFiled: October 27, 2009Publication date: April 29, 2010Inventors: Lowell A. Kleven, David E. Wiklund
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Publication number: 20090292484Abstract: A process fluid flow device includes a power supply module, a process communication module, a processor and measurement circuitry. The process communication circuitry is coupled to the power supply module and to the processor. The measurement circuitry is operably coupleable to plurality of process variable sensors to obtain an indication of differential pressure, static pressure and process fluid temperature. The processor is configured to compute process fluid mass flow, and to use the static pressure and process fluid temperature to obtain an energy per unit mass value relative to the process fluid and to provide an energy flow indication.Type: ApplicationFiled: May 22, 2009Publication date: November 26, 2009Inventors: David E. Wiklund, Lowell A. Kleven
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Publication number: 20090072994Abstract: A process transmitter includes at least one sensor which monitors a process variable, and analog-to-digital (A/D) converter circuitry coupled to the at least one sensor and configured to provide process variable data indicative of process variable values. A digital signal processor (DSP) is coupled to the A/D converter circuitry to receive the process variable data. The DSP comprises a co-processor configured to receive and perform calculations on the process variable data from the A/D converter circuitry to generate output data. Communications circuitry of the process transmitter is configured either to control communication over loop wiring which can be coupled to the process transmitter, or to control wireless communications with the process transmitter. A microprocessor, separate from the co-processor of the DSP, is coupled between the co-processor and the communications circuitry to control movement of the output data from the DSP to the communications circuitry.Type: ApplicationFiled: September 13, 2007Publication date: March 19, 2009Inventors: Lowell A. Kleven, John P. Schulte
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Patent number: 7458275Abstract: A pressure transmitter comprises a metal wall separating a process pressure chamber from an electronics compartment. The metal wall has a stepped bore with a bore shelf facing the process pressure chamber. A metal header has a stepped outer rim with a header shelf that contacts the bore shelf. The metal header includes at least one electrical feedthrough with a glass-to-metal seal adjacent the stepped outer rim. A welded seal seals the stepped outer rim to the stepped bore.Type: GrantFiled: March 15, 2007Date of Patent: December 2, 2008Assignee: Rosemount Inc.Inventors: Lowell A. Kleven, Mark G. Romo
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Publication number: 20080229838Abstract: A pressure transmitter comprises a metal wall separating a process pressure chamber from an electronics compartment. The metal wall has a stepped bore with a bore shelf facing the process pressure chamber. A metal header has a stepped outer rim with a header shelf that contacts the bore shelf. The metal header includes at least one electrical feedthrough with a glass-to-metal seal adjacent the stepped outer rim. A welded seal seals the stepped outer rim to the stepped bore.Type: ApplicationFiled: March 15, 2007Publication date: September 25, 2008Inventors: Lowell A. Kleven, Mark G. Romo
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Publication number: 20070227253Abstract: A circuit that senses a process variable, comprises a voltage divider that includes first and second capacitances. At least one of the capacitances is varied by the process variable. Divider ends receive modulated potentials, and a divider center tap coupled to a detector. The detector has a detector output representing carrier frequency range components. A control circuit controls a baseband envelope of the modulated potentials as a function of the detector output.Type: ApplicationFiled: March 26, 2007Publication date: October 4, 2007Inventor: Lowell A. Kleven
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Patent number: 6658945Abstract: A method and apparatus measures a parameter of a flowing fluid at a first location. A correction is applied to the parameter value that yields an adjusted value representative of the parameter of the fluid at a second location. A flowmeter output is calculated as a function of the adjusted value.Type: GrantFiled: September 21, 1999Date of Patent: December 9, 2003Assignee: Rosemount Inc.Inventor: Lowell A. Kleven
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Patent number: 6651512Abstract: A method and apparatus measures a fluid flow using generated vortices. A flow rate is calculated from at least the frequency of the vortices. Warnings are generated for other characteristics of the vortices and fluid measure.Type: GrantFiled: September 21, 1999Date of Patent: November 25, 2003Assignee: Rosemount, Inc.Inventors: Lowell A. Kleven, Robert C. Hedtke
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Patent number: 6643610Abstract: A transmitter for measuring a process variable includes a sensor configured to couple to a process and having a sensor output related to the process variable. A microprocessor coupled to the sensor output provides a process variable output which is a function of an orthogonal-polynomial of the sensor output. A transmitter output is configured to provide an output related to the process variable.Type: GrantFiled: September 24, 1999Date of Patent: November 4, 2003Assignee: Rosemount Inc.Inventors: Lowell A. Kleven, Ahmed H. Tewfik
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Patent number: 6622573Abstract: A flow device including a differential flow plate insertable into a flow path between pipe sections including a flow conduit supporting a flow interrupter and differential pressure taps. The flow conduit including a seamless interface between the flow interrupter and the pressure taps to reduce non-attributable pressure loss between differential pressure taps as well as reduce field installation labor including that of pressure testing the various pressure couplings.Type: GrantFiled: November 2, 2001Date of Patent: September 23, 2003Assignee: Rosemount Inc.Inventor: Lowell Kleven