| Patent Number |
Title Of Patent |
Date Issued |
| D528020 |
Process device |
September 12, 2006 |
|
| D316975 |
Housing for a current to pressure transmitter |
May 21, 1991 |
|
| 7290450 |
Process diagnostics |
November 6, 2007 |
| A diagnostic device for use in a industrial process includes monitoring electronics or diagnostic circuitry configured to diagnose or identify a condition or other occurrence in the industrial process. The system can be implemented in a process device such as a flowmeter, and in one |
| 6975043 |
Pressurized gas to electrical energy conversion for low-power field devices |
December 13, 2005 |
| An industrial process field device with improved power generation is provided. The process device can be a process variable transmitter, process actuator, or any other suitable field device. The field device includes a wireless transceiver that transceives information related to the |
| 6722261 |
Hydraulic piston position sensor signal processing |
April 20, 2004 |
| A piston position in a cylinder of a hydraulic assembly is measured using microwave pulses. The microwave pulses are launched along a conductor coupled to the piston or cylinder. A sliding member is slidably coupled to the conductor and moves with the piston or cylinder. Position is |
| 6722260 |
Hydraulic piston position sensor |
April 20, 2004 |
| A piston position in a cylinder of a hydraulic assembly is measured using microwave pulses. The microwave pulses are launched along a conductor coupled to the piston or cylinder. A sliding member is slidably coupled to the conductor and moves with the piston or cylinder. Position is |
| 6588313 |
Hydraulic piston position sensor |
July 8, 2003 |
| A piston position in a cylinder of a hydraulic assembly is measured using microwave pulses. The microwave pulses are launched along a conductor coupled to the piston or cylinder. A sliding member is slidably coupled to the conductor and moves with the piston or cylinder. Position is |
| 6307483 |
Conversion circuit for process control system |
October 23, 2001 |
| Conversion circuitry for use in a process control system is adapted for coupling to a primary process control loop. Digital receiver circuitry in the conversion circuitry receives a digital signal transmitted over the primary process control loop from a field transmitter and responsively |
| 6003219 |
Method of making a pressure transmitter having pressure sensor having cohered surfaces |
December 21, 1999 |
| A pressure transmitter having a pressure sensor includes a first half cell and a second half cell. The first half cell includes a first recess formed therein filled with brittle material and having a first sensor surface formed thereon. The second half cell is coupled to the first half c |
| 5963147 |
Conversion circuit for process control system |
October 5, 1999 |
| Conversion circuitry for use in a process control system is adapted for coupling to a primary process control loop. Digital receiver circuitry in the conversion circuitry receives a digital signal transmitted over the primary process control loop from a field transmitter and responsively |
| 5870695 |
Differential pressure measurement arrangement utilizing remote sensor units |
February 9, 1999 |
| A master transmitter couples to first and second slave units through a bus. The slave units provide outputs to the bus related to first and second pressures of a process. The bus provides power to the units and carries signals. The master transmitter is adapted to couple to a two-wire pr |
| 5573032 |
Valve positioner with pressure feedback, dynamic correction and diagnostics |
November 12, 1996 |
| In this invention, a valve positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the position of the valve and the control pressure, and a control circuit in the positioner uses |
| 5558115 |
Valve positioner with pressure feedback, dynamic correction and diagnostics |
September 24, 1996 |
| In this invention, a valve positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the position of the valve and the control pressure, and a control circuit in the positioner uses |
| 5549137 |
Valve positioner with pressure feedback, dynamic correction and diagnostics |
August 27, 1996 |
| In this invention, a valve positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the position of the valve and the control pressure, and a control circuit in the positioner uses |
| 5431182 |
Smart valve positioner |
July 11, 1995 |
| A valve positioner controls operation of a valve in a process control system. The valve positioner is coupled to a process control loop over which it receives a signal representative of a desired valve position and operating power for the positioner. The valve positioner controls a p |
| 5356002 |
Baseball/softball sport utility bag |
October 18, 1994 |
| A sport utility bag is disclosed which includes a plurality of individually accessible compartments on said utility bag with at least one of said compartments having access means on said bottom panel of said bag to allow easy cleaning, said bag also comprising an elongate compartment ext |
| 4760859 |
Modular pressure instrument |
August 2, 1988 |
| A modular transmitter has an outer housing with a wall forming an interior cavity in which a control module is inserted. The wall has one or more ports therein that are connected to pressure conduits. When the control module is fully seated, the ports align with internal passageways in t |
| 4665938 |
Frequency feedback on a current loop of a current-to-pressure converter |
May 19, 1987 |
| A current-to-pressure (I/P) converter provides an output pressure as a function of the magnitude of a variable input DC current. The I/P converter includes a pressure sensor which produces a feedback signal representative of the output pressure. Based upon the feedback signal and the |
| 4653523 |
Pneumatic amplifier with negative feedback for current to pressure transducer |
March 31, 1987 |
| A fluid amplifier is used in a pneumatic transducer to provide a control output pressure in response to a pilot pressure provided as a function of a current signal. The fluid amplifier includes a valve that opens a pressure source to the control port and also controls pressure feeding |
| 4638830 |
High sensitivity magnetic actuator |
January 27, 1987 |
| An improved magnetic actuator for providing mechanical actuation representative of an input current has a housing that supports a coil surrounding a central core, and includes a diaphragm type spring above the central core. A cover of high magnetic permeability is mounted on the hous |
| 4534376 |
Electric signal to pressure signal transducer |
August 13, 1985 |
| An electric signal to pneumatic signal transducer 10 comprises a nozzle 12 that accepts an input pneumatic supply and expels a gas stream 20. A receiver 16 that is spaced from the nozzle is positioned to recover at least a portion of the gas stream. The recovered portion constitutes a |
