Stephen Robert Samms

US Patent:

7360446, Apr 22, 2008

Filed:

May 31, 2006

Appl. No.:

11/444090

Inventors:

Steve X. Dai - Gilbert AZ, US
Stephen R. Samms - Mesa AZ, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01F 1/20

US Classification:

7386119

Abstract:

An apparatus is provided for measuring the amount of fluid () flowing in a channel (). The apparatus comprises a fluidic oscillation flow meter () including a housing () defining an inlet () for receiving the fluid (), and first and second diversion channels () for alternately receiving the fluid () from the inlet (). The housing () comprises a first nozzle () for receiving the fluid () from the first diversion channel () and deflecting the fluid () from the inlet () into the second diversion channel (). A second nozzle () receives the fluid () from the second diversion channel () and alternately deflects the fluid () from the inlet () into the first diversion channel (). A first layer of material () overlies at least one of the first and second diversion channels () and includes a sensing area that distorts due to a pressure change caused by the fluid () flowing through the diversion channels (). A first sensing piezoresistor () is positioned on the layer of material () near the first diversion channel () for detecting the pressure change of the sensing area and generating a frequency signal.

US Patent:

20040228211, Nov 18, 2004

Filed:

May 13, 2003

Appl. No.:

10/437479

Inventors:

Chowdary Koripella - Scottsdale AZ, US
Rajnish Changrani - Champaign IL, US
Stephen Samms - Mesa AZ, US

International Classification:

B01F013/00

US Classification:

366/341000

Abstract:

An exemplary system and method for providing substantially uniform mixing of fluid reactants, wherein the flow velocities and/or device dimensions generally correspond to Reynolds numbers less than unity, is disclosed as comprising inter alia: a first fluid inlet (); a second fluid inlet (); and a fluid transport channel () having a plurality of features () corresponding to relatively discontinuous or otherwise abrupt shifts in the fluid transportation gradient. Disclosed features and specifications may be variously controlled, adapted or otherwise optionally modified to improve mixing operation in any diffusion limited application. Exemplary embodiments of the present invention representatively provide for efficient mixing of fluid phases at relatively low Reynolds numbers and may be readily integrated with existing micro-scale technologies for the improvement of device package form factors, weights and other manufacturing and/or device performance metrics.

US Patent:

20070003814, Jan 4, 2007

Filed:

Jun 29, 2005

Appl. No.:

11/174269

Inventors:

Allison Fisher - Chandler AZ, US
Jerald Hallmark - Gilbert AZ, US
Stephen Samms - Mesa AZ, US

International Classification:

H01M 8/02
H01M 8/04

US Classification:

429038000, 429026000

Abstract:

A polymer electrolyte membrane fuel cell stack () includes a plurality of membrane electrode assemblies () having evenly distributed fuel concentration across an anode (), and efficient cooling across a cathode (). A first plate () has a fuel side () with a plurality of serpentine channels () formed therein for distributing fuel across the anode (), and a second plate () has an oxidant side () with oxidant channels () formed therein for distributing an oxidant across the cathode (). The membrane electrode assembly () has an even fuel concentration thereacross, and the oxidant is routed through the cell () at least twice for absorbing heat prior to being distributed across the cathode ().

US Patent:

20070022825, Feb 1, 2007

Filed:

Jul 29, 2005

Appl. No.:

11/192819

Inventors:

Stephen Samms - Mesa AZ, US
Chowdary Koripella - Scottsdale AZ, US

International Classification:

G01F 1/20

US Classification:

073861190

Abstract:

An apparatus () is provided for determining the flow rate of a gas. The apparatus comprises a housing () forming a vaporization chamber () for converting a fluid into a gas vapor when subjected to heat (). An oscillation flow meter is formed within the housing (), thereby being integrated with the vaporization chamber, for receiving the gas vapor and providing a frequency signal () indicative of the rate of flow of the gas vapor.

US Patent:

20090036303, Feb 5, 2009

Filed:

Jul 30, 2007

Appl. No.:

11/830098

Inventors:

Stephen R. Samms - Mesa AZ, US

Assignee:

MOTOROLA, INC. - Schaumburg IL

International Classification:

B01J 32/00

US Classification:

502439

Abstract:

A method is provided for placing high surface area catalyst material () within ceramic micro-reactors. The method comprises forming a first cavity () in a first green sheet () and disposing a high surface area catalyst material () within the first cavity (). The first green sheet () is placed adjacent to a second green sheet wherein the first cavity is surrounded by the first and second green sheets. At least one input channel () and one output channel () is provided to the catalyst material before the ceramic micro-reactor is fired.