John E Garnett

US Patent:

7484426, Feb 3, 2009

Filed:

Feb 14, 2007

Appl. No.:

11/706135

Inventors:

Russell N. Evans - Louisville CO, US
John E. Garnett - Boulder CO, US

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

G01F 1/37
G06F 19/00

US Classification:

7386152, 702 50

Abstract:

A process variable transmitter is operably coupleable to a source of multiphasic process fluid flow. The process variable transmitter is configured to obtain information relative to temperature, a reference pressure, and differential pressure across a differential pressure producer in the multiphasic process flow. The process variable transmitter is configured to calculate and/or correct for overreading based upon the reference pressure, the differential pressure and the temperature.

US Patent:

7654154, Feb 2, 2010

Filed:

Mar 21, 2008

Appl. No.:

12/053396

Inventors:

John Everett Garnett - Boulder CO, US
Stephen Arthur Ifft - Longmont CO, US

Assignee:

Dieterich Standard, Inc. - Boulder CO

International Classification:

G01F 1/37
G01F 1/42

US Classification:

7386152, 7386161

Abstract:

An element of an averaging orifice plate fluid flow meter for measuring the volumetric rate of fluid flow in a conduit having an interior circumference for carrying a flow of fluid comprising, a planar flow impedance plate for disposition transversely across the interior of the conduit and perpendicular to the fluid flow, a plurality of spaced apart orifices disposed in the plate where the profile of each orifice is a segment of a circle on an arc where the arc is coincident with a portion of the interior circumference of the conduit.

US Patent:

7836780, Nov 23, 2010

Filed:

Feb 26, 2008

Appl. No.:

12/072494

Inventors:

John Everett Garnett - Boulder CO, US
Stephen Arthur Ifft - Longmont CO, US
Marcos A. V. Peluso - Chanhassen MN, US
David Eugene Wiklund - Eden Prairie MN, US

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

G01F 1/32

US Classification:

7386122

Abstract:

A device comprises a sensor tube for placement in a process flow and a flow-modifying element. The flow-modifying element is formed on the sensor tube, in order to reduce flow-induced vibrations by reducing coherent vortex shedding in the process flow.

US Patent:

57737266, Jun 30, 1998

Filed:

Jun 4, 1996

Appl. No.:

8/658147

Inventors:

Ralene S. Mahoney - Boulder CO
Donald R. Verhaagen - Golden CO
John Everett Garnett - Boulder CO

Assignee:

Dieterich Technology Holding Corp. - Boulder CO

International Classification:

G01F 146

US Classification:

7386165

Abstract:

A fluid pressure and temperature sensing probe assembly for a mass flow measurement system comprising, a tubular body, a portion of which is adapted for insertion into the fluid flowing in a confined conduit, and having, within the body, a pair of separated plenums. Openings are provided in the tubular body which expose the respective plenums to high and low fluid pressures in the fluid flow. An electrically responsive temperature sensor, having an electrical signal output, is disposed within the tubular body of the probe. A pressure transducer, in fluid communication with the plenums, converts the fluid pressures in the plenums to at least one electrical signal representative of the difference between the high and low fluid pressures. A transmitter transmits the electrical signal from the pressure transducer and the electrical temperature signal to a remote location.

US Patent:

59692669, Oct 19, 1999

Filed:

Feb 6, 1998

Appl. No.:

9/020096

Inventors:

Ralene S. Mahoney - Boulder CO
Donald R. Verhaagen - Golden CO
John Everett Garnett - Boulder CO

Assignee:

Dieterich Technology Holding Corp. - Boulder CO

International Classification:

G01F 146

US Classification:

7386165

Abstract:

A combined temperature and pressure sensing probe assembly for a flow measurement system comprising a body, a portion of which is adapted for insertion into fluid flowing in a confined conduit, such as a pipe. Within the body are separated plenums which are exposed respectively to high and low fluid pressures in the flow. A manifold block is that portion of the body which is disposed outside of the pipe containing the fluid flow. Along with valves and fluid conveying channels, the block is equipped with a duct for carrying electrical conductors and also contains a traversing bore which is aligned with the body and is in communication with the conductor carrying duct. An electrically responsive temperature sensor is disposed within or formed from the body. Conductors from the temperature sensor are directed from the manifold's bore through the connecting duct to a point exterior of the manifold.

US Patent:

57103704, Jan 20, 1998

Filed:

May 17, 1996

Appl. No.:

8/650140

Inventors:

Eugene Miles Shanahan - Niwot CO
John Everett Garnett - Boulder CO
Robert James Gray - Louisville CO
Gabriel Dragnea - Longmont CO

Assignee:

Dieterich Technology Holding Corp. - Boulder CO

International Classification:

G01F 2500

US Classification:

73 135

Abstract:

In a flow measurement system comprising a primary flow sensor and a secondary electronic conversion apparatus for converting high and low fluid pressure signals from the primary flow sensor to an electronic signal output representative of fluid flow, a process for calibrating the system as an integral unit, comprising the steps of applying a plurality of known reference fluid flow rates to the primary flow sensor over the system's operative range of flow conditions, sensing the electrical output of the secondary electronic conversion apparatus for each of the said plurality of reference fluid flow rates, establishing a correction factor for each of said recorded values of electrical output which will tend to linearize the relationship between fluid flow rate and the electrical output of the measuring system, and storing the correction factors in non-volatile memory in a microprocessor which is part of the secondary electronic conversion apparatus.

US Patent:

20150075293, Mar 19, 2015

Filed:

Sep 17, 2013

Appl. No.:

14/029207

Inventors:

- Boulder CO, US
John Everett Garnett - Boulder CO, US

Assignee:

Dieterich Standard, Inc. - Boulder CO

International Classification:

G01F 1/46

US Classification:

7386167, 29428

Abstract:

A customizable length averaging pitot tube (APT) probe for insertion into a confined conduit, such as a process pipe, is disclosed. The APT probe includes a probe portion, configured to be inserted into the confined conduit, which includes longitudinally extending upstream, downstream and middle surfaces to form first and second fluid carrying plenums within the APT probe portion. A plurality of longitudinally arranged openings are disposed along the length of the upstream surface with each opening in fluid communication with the first fluid carrying plenum. A plurality of longitudinally arranged openings are disposed along the length of the downstream surface with each opening in fluid communication with the second fluid carrying plenum. A cap is affixed to an end of the APT probe portion to isolate the first and second fluid carrying plenums at the end of the APT probe portion. An elongated body is coupled to the APT probe portion and provides fluid passageways fluidically coupled to the first and second plenums for coupling process pressures from the first and second plenums to a pressure sensor.