Robert T Chinnock, 728601 Woodstone Gln, Victoria, MN 55386

7155983, Jan 2, 2007

Feb 4, 2005

11/052005

David L. Wehrs - Eden Prairie MN, US
Robert T. Chinnock - Victoria MN, US

Entegris, Inc. - Chaska MN

G01F 1/58

7386112

A magnetic flow metering device and method is disclosed for the measurement of corrosive flow streams. The device utilizes a unibody construction wherein the flow conduit is constructed entirely from an insulative, non-conducting material without resorting to a metallic outer housing. The portions of the electrodes in contact with the flow stream are made of a suitable conductive polymer material, resistant to the corrosive media. The electrodes also feature shields that are molded into the electrode assembly to reduce background electrical noise. The invention also utilizes an electrical configuration that actively drives the electrode shield circuit (electrodes as well as cabling) to provide a more accurate measurement of the electromotive force.

7343817, Mar 18, 2008

May 31, 2007

11/807996

David L. Wehrs - Eden Prairie MN, US
Robert T. Chinnock - Victoria MN, US

Entegris, Inc. - Chaska MN

G01F 1/58

7386112

A magnetic flow metering device and method is disclosed for the measurement of corrosive flow streams. The device utilizes a unibody construction wherein the flow conduit is constructed entirely from an insulative, non-conducting material without resorting to a metallic outer housing. The portions of the electrodes in contact with the flow stream are made of a suitable conductive polymer material, resistant to the corrosive media. The electrodes also feature shields that are molded into the electrode assembly to reduce background electrical noise. The invention also utilizes an electrical configuration that actively drives the electrode shield circuit (electrodes as well as cabling) to provide a more accurate measurement of the electromotive force.

7866337, Jan 11, 2011

Jul 7, 2006

11/482542

Robert T. Chinnock - Victoria MN, US
Clifford Miller - Bloomington MN, US
Charles Meacham - Circle Pines MN, US

Entegris, Inc. - Billerica MA

F16K 31/02

1374875, 137486, 137859, 174254, 174268

A flow controller including a unitary controller body with a chemically inert fluid conduit having an insertable constriction or orifice disposed within the conduit having a reduced cross-sectional area to thereby restrict the flow of fluid within the conduit allowing for reliable flow measurement. An integrated circuit or controller may be coupled to the control valve and also coupled to the pressure sensors by a lead structure including signal conductors surrounded by a Faraday cage, and a chemically inert housing coupled to the unitary controller body enclosing the control valve and the pressure sensors.

2007006, Mar 22, 2007

Nov 14, 2006

11/599023

David Wehrs - Eden Prairie MN, US
Robert Chinnock - Victoria MN, US

G01F 1/58

073861120

A magnetic flow metering device and method is disclosed for the measurement of corrosive flow streams. The device utilizes a unibody construction wherein the flow conduit is constructed entirely from an insulative, non-conducting material without resorting to a metallic outer housing. The portions of the electrodes in contact with the flow stream are made of a suitable conductive polymer material, resistant to the corrosive media. The electrodes also feature shields that are molded into the electrode assembly to reduce background electrical noise. The invention also utilizes an electrical configuration that actively drives the electrode shield circuit (electrodes as well as cabling) to provide a more accurate measurement of the electromotive force.

5297773, Mar 29, 1994

Jul 16, 1993

8/092690

Timothy R. Collins - Cologne MN
Robert T. Chinnock - Victoria MN
Dean T. Hamilton - Cologne MN

Fluoroware, Inc. - Chaska MN

F16K 700

251 4

A plastic valve comprising a valve body, integral plastic valving duct means with rigid tubular plastic end portions for attachment to flow ducts carrying liquids to be valved, and a collapsible and distensible tubular plastic valving portion welded to the tubular end portions, the valving portion have sidewalls of plastic film laminae free of each other, but welded to each other at edges to form resilient side rib portions, squeezing linkages traversing flexible wall portions and applying squeezing pressure onto the flexible wall portions to close the flow passage therebetween, tiltable squeeze bars extending along the flexible wall adjacent the squeezing linkages and progressively deforming the flexible wall portions during application of squeezing pressure, camming impeller portions applying and relieving squeezing pressure against the squeezing linkages and squeeze bars and camming against the camming surfaces of the body portion as a driving head moves the impeller portions in the valve body portion.

5316035, May 31, 1994

Feb 19, 1993

8/019039

Timothy R. Collins - Cologne MN
Robert T. Chinnock - Victoria MN
Robert C. Grant - Eden Prairie MN
Dean T. Hamilton - Cologne MN

Fluoroware, Inc. - Chaska MN

F16K 2300

137312

A capacitive proximity monitoring device for corrosive atmosphere environments comprising a capacitance field element or sensing element disposed in such a corrosive atmosphere environment and being made of conductive plastic resistant for such a corrosive atmosphere environment. The field element may be a functional part of a functional device that performs a function with respect to the presence of the liquid being sensed; and in some cases the field element is nonfunctional with respect to the liquid, but functional and sensing the capacitance and determining the presence or absence of liquid.

4977929, Dec 18, 1990

Jun 28, 1989

7/372647

Robert T. Chinnock - Victoria MN
Jeffrey J. McKenzie - Watertown MN

Fluoroware, Inc. - Chaska MN

F16K 712

137863

The present weir valve includes a weir disposed along a flow passage. A port at the other side of the weir is open to the flow passage when the diaphragm is lifted off the weir.

5449017, Sep 12, 1995

Jan 18, 1995

8/375185

Timothy R. Collins - Cologne MN
Robert T. Chinnock - Victoria MN
Robert C. Grant - Eden Prairie MN
Dean T. Hamilton - Cologne MN

Fluoroware, Inc. - Chaska MN

F16K 2300
G08B 2100

137312

A capacitive proximity monitoring device for corrosive atmosphere environments comprising a capacitance field element or sensing element disposed in such a corrosive atmosphere environment and being made of conductive plastic resistant for such a corrosive atmosphere environment. The field element may be a functional part of a functional device that performs a function with respect to the presence of the liquid being sensed; and in some cases the field element is nonfunctional with respect to the liquid, but functional and sensing the capacitance and determining the presence or absence of liquid.