Tracy A Prevo

US Patent:

20130071794, Mar 21, 2013

Filed:

Oct 23, 2012

Appl. No.:

13/658766

Inventors:

JOSEPH COLANNINO - MERCER ISLAND WA, US
THOMAS S. HARTWICK - SNOHOMISH WA, US
DAVID B. GOODSON - SEATTLE WA, US
TRACY A. PREVO - SEATTLE WA, US
CHRISTOPHER A. WIKLOF - EVERETT WA, US

Assignee:

CLEARSIGN COMBUSTION CORPORATION - SEATTLE WA

International Classification:

F23D 14/84
F23C 5/14

US Classification:

431 2, 431253, 431354

Abstract:

A charge electrode configured to impart a time-varying majority charge on a flame and a shape electrode located outside the flame may be driven synchronously by a voltage source through time varying voltage(s). The flame may be flattened or compressed responsive to an electric field produced by the shape electrode acting on the charges imparted on the flame.

US Patent:

20130170090, Jul 4, 2013

Filed:

Dec 28, 2012

Appl. No.:

13/729159

Inventors:

Joseph COLANNINO - Mercer Island WA, US
Tracy A. PREVO - Seattle WA, US
Igor A. KRICHTAFOVITCH - Kirkland WA, US
Christopher A. WIKLOF - Everett WA, US

Assignee:

CLEARSIGN COMBUSTION CORPORATION - Seattle WA

International Classification:

H02J 17/00

US Classification:

361225

Abstract:

An apparatus for enhancing flame radiation includes a flame charging system and an electrically isolated electrode. A time-varying voltage is applied to the flame charging system and the flame charging system imparts a corresponding time-varying charge or time-varying voltage onto the flame. The flame responds to the time-varying charge or voltage by increasing its luminosity.

US Patent:

20130230810, Sep 5, 2013

Filed:

Dec 30, 2012

Appl. No.:

13/731095

Inventors:

DAVID B. GOODSON - SEATTLE WA, US
TRACY A. PREVO - SEATTLE WA, US
JOSEPH COLANNINO - MERCER ISLAND WA, US
ROBERT E. BREIDENTHAL - SEATTLE WA, US
CHRISTOPHER A. WIKLOF - EVERETT WA, US

Assignee:

CLEARSIGN COMBUSTION CORPORATION - Seattle WA

International Classification:

F23L 7/00

US Classification:

431 4, 431354

Abstract:

An inertial electrode launcher may be configured to project charged particles or a voltage comprising an inertial electrode proximate a flame or combustion gas produced by the flame.

US Patent:

20130230811, Sep 5, 2013

Filed:

Dec 31, 2012

Appl. No.:

13/731223

Inventors:

DAVID B. GOODSON - SEATTLE WA, US
TRACY A. PREVO - SEATTLE WA, US
JOSEPH COLANNINO - MERCER ISLAND WA, US
ROBERT E. BREIDENTHAL - SEATTLE WA, US
CHRISTOPHER A. WIKLOF - EVERETT WA, US

Assignee:

CLEARSIGN COMBUSTION CORPORATION - SEATTLE WA

International Classification:

F23L 7/00

US Classification:

431 4, 431354

Abstract:

A combustion system includes a subsystem for electrically biasing or charging a flame and a virtual electrode launcher configured to launch a virtual electrode in proximity to the flame or combustion gas produced by the flame.

US Patent:

20130255549, Oct 3, 2013

Filed:

Mar 26, 2013

Appl. No.:

13/850936

Inventors:

JOSEPH COLANNINO - MERCER ISLAND WA, US
DAVID B. GOODSON - BELLEVUE WA, US
TRACY A. PREVO - SEATTLE WA, US
CHRISTOPHER A. WIKLOF - EVERETT WA, US

Assignee:

CLEARSIGN COMBUSTION CORPORATION - SEATTLE WA

International Classification:

F23B 90/00

US Classification:

110342, 431253

Abstract:

A solid fuel burner may include a system for electrodynamic homogenization. One or more electrodes may apply an electric field to burning solid fuel or a region proximate the burning solid fuel. The electric field causes mixing and homogenization of volatilized fractions of the solid fuel, combustion gases, and air. The improved mixing and homogenization may reduce emission of carbon monoxide (CO), reduce emission of oxides of nitrogen (NOx), reduce oxygen in flue gas, increase temperature of flue gas, and/or allow for a larger grate surface.

US Patent:

20130323661, Dec 5, 2013

Filed:

May 31, 2013

Appl. No.:

13/907136

Inventors:

IGOR A. KRICHTAFOVITCH - KIRKLAND WA, US
TRACY A. PREVO - SEATTLE WA, US
CHRISTOPHER A. WIKLOF - EVERETT WA, US

Assignee:

CLEARSIGN COMBUSTION CORPORATION - SEATTLE WA

International Classification:

C04B 2/10
F27B 9/06
F27B 9/00

US Classification:

432 20, 432140, 432108

Abstract:

A flame used to heat a process material may be extended or otherwise shaped by the application of voltages using electrodes.

US Patent:

20140038113, Feb 6, 2014

Filed:

Jul 31, 2013

Appl. No.:

13/956315

Inventors:

VINCENZO CASASANTA, III - WOODINVILLE WA, US
JOSEPH COLANNINO - BELLEVUE WA, US
DAVID B. GOODSON - BELLEVUE WA, US
TRACY A. PREVO - SEATTLE WA, US
RICHARD F. RUTKOWSKI - SEATTLE WA, US
CHRISTOPHER A. WIKLOF - EVERETT WA, US

Assignee:

ClearSign Combustion Corporation - Seattle WA

International Classification:

F23N 5/16

US Classification:

431 2, 431 19

Abstract:

A system is configured to apply a voltage, charge, and/or an electric field to a combustion reaction responsive to acoustic feedback from the combustion reaction.

US Patent:

20140076212, Mar 20, 2014

Filed:

Sep 19, 2013

Appl. No.:

14/031828

Inventors:

Tracy A. Prevo - Seattle WA, US

Assignee:

ClearSign Combustion Corporation - Seattle WA

International Classification:

F23J 3/04
F23J 15/00
F23D 14/46

US Classification:

110344, 431159, 431181, 110216

Abstract:

An apparatus for treating a combustion product stream includes a burner assembly configured to support one or more flames, the burner assembly having at least a portion configured to be driven to or held at one or more first voltages. A collection surface is held at a voltage different than the one or more first voltages to attract particulates charged by the burner assembly.