1
Fred C Sittler, Cynthia R Nelson: Micromachined valve with polyimide film diaphragm. Rosemount, Kinney & Lange P A, September 26, 1989: US04869282 (118 worldwide citation)

A micromachined miniature valve used for gas chromatography has very low valve and interconnection dimensions to reduce the fluid volume inherent in other gas switching valves to thereby provide accurate measurements involving small gas flows. In order to reduce actuating diaphragm size, without enc ...


2
Fred C Sittler, Roger Frick: Pressure sensor for a pressure transmitter. Rosemount, Westman Champlin & Kelly P A, November 26, 2002: US06484585 (67 worldwide citation)

A pressure transmitter in a process control system for transmitting pressure on a process control loop includes a transmitter housing, an isolation diaphragm configured to couple to a process fluid, and a pressure sensor body of a brittle corrosion resistant material operably coupled to the housing ...


3
Fred C Sittler: Transmitter with isolation assembly for pressure sensor. Rosemount, Westman Champlin & Kelly P A, March 24, 1998: US05731522 (44 worldwide citation)

A process control transmitter includes a transmitter housing and transmitter circuitry adapted for providing a transmitter output related to a sensed pressure. A sensor coupling in the housing defines a pressure sensor cavity which is filled with isolation fluid. An isolation diaphragm separates the ...


4
Fred C Sittler, Robert C Bohara: Integrated semiconductor resistance temperature sensor and resistive heater. Rosemount, Kinney & Lange, February 28, 1989: US04808009 (43 worldwide citation)

An integrated sensing device includes a resistance temperature sensor formed in a semiconductor substrate and a resistance heater which is formed on an insulating layer which covers the surface of the semiconductor substrate. The resistance heater has a low temperature coefficient of resistivity and ...


5
Fred C Sittler, James H Crabtree: Fluid flow detector. Rosemount, Kinney & Lange, March 20, 1990: US04909078 (37 worldwide citation)

A thermal effect sensing device comprises a semiconductor substrate supporting an insulating layer which has a thin film of platinum deposited on it. Holes are etched through the semiconductor substrate and the insulating layer. The platinum film is shaped to provide a serpentine resistive element s ...


6
Mark G Romo, Stanley E Rud Jr, Mark A Lutz, Fred C Sittler, Adrian C Toy: Grain growth of electrical interconnection for microelectromechanical systems (MEMS). Rosemount, Westman Champlin & Kelly P A, February 11, 2003: US06516671 (35 worldwide citation)

A sensor has an electrical interconnect grown in a cavity between first and second layers that are bonded together. Electrically conductive grain growth material is selectively deposited on at least one of two electrically conductive film interconnect regions that face one another across the cavity. ...


7
Fred C Sittler: Micromachined mass spectrometer. Rosemount Analytical, Westman Champlin & Kelly P A, July 30, 1996: US05541408 (35 worldwide citation)

A micromachined mass spectrometer includes an ionizer, a separation region and a detector. The ionizer is formed from an upper electrode, a center electrode and a lower electrode. Ionization of a sample gas takes place around an edge of the center electrode. Accelerating electrodes extract ionized p ...


8
Mark A Lutz, Roger Frick, Fred C Sittler, Adrian C Toy: Method and apparatus for a direct bonded isolated pressure sensor. Rosemount, Westman Champlin & Kelly P A, February 18, 2003: US06520020 (30 worldwide citation)

A pressure sensor integrally formed in the shape of a beam around a central channel. The beam has an integral blind end that is pressurized by the fluid. The beam has an opposite end that is shaped to provide a stepped corner with a gap opening at the base of the stepped corner, where the gap and is ...


9
David A Broden, Kelly Orth, Chad M McGuire, Fred C Sittler: High temperature pressure transmitter assembly. Rosemount, Westman Champlin & Kelly P A, May 2, 2006: US07036381 (28 worldwide citation)

A pressure transmitter assembly for measuring a pressure of a process fluid includes an isolation diaphragm assembly. A pressure sensor is spaced apart from the isolation diaphragm assembly to provide thermal isolation. A conduit extends from the isolation diaphragm assembly to the pressure sensor a ...


10
Fred C Sittler: Organic chemical sensor. Rosemount, Westman Champlin & Kelly, January 9, 1996: US05482678 (24 worldwide citation)

In this invention, a first sensor senses an organic gas, liquid or vapor and includes a first support having a first support surface with a layer of material fastened to it. In the presence of liquid, gas or vapor, the material swells and expands so as to vary at least one of its dimensions. Such ex ...



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