Sivakumar M Muthuswamy

US Patent:

6406808, Jun 18, 2002

Filed:

Apr 10, 2000

Appl. No.:

09/546337

Inventors:

Steven D. Pratt - Plantation FL
Ronald J. Kelley - Coral Springs FL
Sivakumar Muthuswamy - Plantation FL
Robert W. Pennisi - Boca Raton FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 804

US Classification:

429 26

Abstract:

A method and apparatus for managing thermal performance of a fuel cell system having a fuel cell assembly and a fuel storage container is disclosed. The fuel cell system consists of one or more fuel cells , each having a major surface , and disposed next to each other in a side-by-side adjacent arrangement and a fuel storage container having an exterior wall. The fuel cells are positioned such that distance between the major surfaces and the fuel storage container wall along a direction normal to the major surfaces is substantially the same. In addition, one or more of the fuel cells are in thermal contact with the fuel storage container such that cell waste heat is transferred to the fuel storage container.

US Patent:

6423434, Jul 23, 2002

Filed:

Aug 9, 1999

Appl. No.:

09/370157

Inventors:

Steven D. Pratt - Plantation FL
Ronald J. Kelley - Coral Springs FL
Sivakumar Muthuswamy - Plantation FL
Robert W. Pennisi - Boca Raton FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 804

US Classification:

429 13, 429 22

Abstract:

A method and apparatus for managing the performance of a fuel cell system ( ) using an agitation means ( ). The method of managing the performance involves, monitoring operational parameters ( ) of individual fuel cells and the overall fuel cell system, comparing performance parameters ( ) of the system against target values, selecting a control method ( ) from a set of available control methods based on the result of comparison of the performance parameters against the target values and using that control method to initiate and control an agitation process, and actuating ( ) an agitation means using the selected control method so as alter the monitored operational parameters ( ).

US Patent:

6426158, Jul 30, 2002

Filed:

Jul 20, 2000

Appl. No.:

09/620234

Inventors:

Steven D. Pratt - Plantation FL
Sivakumar Muthuswamy - Plantation FL
Ronald J. Kelley - Coral Springs FL
Robert W. Pennisi - Boca Raton FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 804

US Classification:

429 13, 429 22, 429 34

Abstract:

A method of diluting reacted fuel gas that is exhausted from a fuel cell. The reacted fuel gas is transferred from the fuel cell ( ) into a hydrogen diluting mechanism ( ) prior to release into the atmosphere, so that when the reacted fuel gas is subsequently released into the atmosphere, the percentage of hydrogen immediately surrounding the fuel cell does not exceed 4 percent by volume.

US Patent:

6486874, Nov 26, 2002

Filed:

Nov 6, 2000

Appl. No.:

09/706894

Inventors:

Sivakumar Muthuswamy - Plantation FL
Joseph G. Gillette - Margate FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G09G 500

US Classification:

345173, 178 1801, 345863

Abstract:

A method ( ) of pre-caching user interaction elements, includes monitoring motion patterns ( ) with an electronic input device having a gesture recorder and a writing surface using a three-dimensional position of the recorder with respect to the writing surface, analyzing the monitored motion patterns ( ) made while the recorder is off the writing surface to determine if the recorder is approaching a target area at the writing surface ( ), the target area having an associated functionality, and triggering the functionality ( )before contact between the recorder and the target area. The steps are repeated continuously. The analyzing step ( ) determines if the recorder is moving towards the writing surface, and, if so, a two-dimensional location of the recorder with respect to the plane of the writing surface is determined ( ) and a trajectory is defined based upon the location and movement of the recorder off the writing surface. A control area disposed at an endpoint of the trajectory is identified ( ) as the target area to be triggered. Alternatively, a plurality of trajectories between the recorder and a control area is defined based upon recorder location and movement off the writing surface and correlated with the actual trajectory.

US Patent:

6584825, Jul 1, 2003

Filed:

Aug 13, 2001

Appl. No.:

09/928607

Inventors:

Steven D. Pratt - Plantation FL
Sivakumar Muthuswamy - Plantation FL
Ronald J. Kelley - Coral Springs FL
Robert W. Pennisi - Boca Raton FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01N 1910

US Classification:

73 232, 73 2331, 422 88, 702 24

Abstract:

An apparatus and method for measuring the quantity of hydrogen in a hydrogen storage vessel of a hydrogen fuel cell using the Pressure, Composition, Temperature (PCT) relationship of the storage media is disclosed. The method of measuring the quantity of hydrogen involves, measuring the temperature of the hydrogen storage media at one or more points on the hydrogen storage vessel , measuring the mechanical strain at one or more points on the hydrogen storage vessel, computing the pressure inside the vessel based on the strain measurements, referring to a lookup table or an equation representing the discharge PCT curve for the particular composition of the hydrogen storage media at the measured temperature and computing the hydrogen concentration at the measured pressure. The changes in temperature and pressure during hydrogen absorption-desorption which are characteristic of hydride storage media air is used to measure the hydrogen concentration in the storage vessel and the hydrogen to metal hydride.

US Patent:

6586124, Jul 1, 2003

Filed:

Mar 26, 2001

Appl. No.:

09/817336

Inventors:

Ronald J. Kelley - Coral Springs FL
Steven D. Pratt - Plantation FL
Sivakumar Muthuswamy - Plantation FL
Robert W. Pennisi - Boca Raton FL

Assignee:

Motorola INC - Schaumburg IL

International Classification:

H01M 804

US Classification:

429 17, 429 12, 429 13, 4292182

Abstract:

An apparatus and method for temperature regulation of a fuel cell using differential heat capacity of the fuel storage media is disclosed. The method of regulating the temperature involves measuring the temperature of one or more fuel cells, comparing the temperature against target values, selecting a control method from a set of available control methods based on the result of comparison and using that control method to initiate and control a regulation cycle, and actuating a flow control means using the selected control method to alter the flow of fuel between one or more fuel storage containers, each containing fuel storage media which exhibit different enthalpies of formation and dissociation. The regulation process starts with measuring temperature ( ) of a fuel cell system ( ). The measured temperature is then compared ( ) to a predetermined set of ideal target values designed to provide peak fuel cell performance.

US Patent:

6606525, Aug 12, 2003

Filed:

Dec 27, 1999

Appl. No.:

09/472285

Inventors:

Sivakumar Muthuswamy - Plantation FL
Anupama Ramamurthy - Plantation FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G05B 1302

US Classification:

700 52, 700 55, 700 73, 709201, 709203, 709217, 709225, 707 2, 7071041, 707 6

Abstract:

A system and method for merging static data and dynamic data downloaded to a browser from a network site of a network, preferably being a website on the Internet. The system includes at least one server in communication with the network, and the server hosts one or more network sites that include static data and dynamic data. The system further includes at least one user computer in communication with the network with a browser on the user computer that selectively interacts with network sites and selectively downloads the static data and dynamic data from the interacted network site. The user computer stores the static data and dynamic data in a local data store and recognizes the static data and dynamic data, preferably through marking with pointers, and upon refreshing of the downloaded data being requested, the user computer downloads dynamic data from the network site. The system provides a method including the steps of downloading static and dynamic data to the user computer from an interacted network site, recognizing the static data and dynamic data, storing the static data and dynamic data in a local data store of the user computer, requesting the refreshing of all downloaded data on the user computer from the network site, and downloading the dynamic data from the network site.

US Patent:

6689194, Feb 10, 2004

Filed:

Mar 12, 2001

Appl. No.:

09/803190

Inventors:

Steven D. Pratt - Plantation FL
Sivakumar Muthuswamy - Plantation FL
Ronald J. Kelley - Coral Springs FL
Robert W. Pennisi - Boca Raton FL

Assignee:

Motorola, Inc - Schaumburg IL

International Classification:

B01D 5304

US Classification:

95139, 95140, 961175, 96151, 423230, 423247, 429 12, 429 13

Abstract:

Oxides of carbon and other impurities are removed from a hydrogen fuel supply stream ( ) for a fuel cell ( ). A getter element ( ) sufficient for chemisorbing the oxides of carbon from the hydrogen is removably connected to the fuel cell anode side. The fuel stream is passed through the getter element so as to chemisorb the oxides of carbon onto the getter, thereby providing a purified stream of hydrogen ( ) to the fuel cell anode. The getter is removed from the fuel cell when the getter is spent and replaced with a fresh getter.