HOLGER STRECKERT
Pilots in Rancho Santa Fe, CA

6447945, Sep 10, 2002

Dec 12, 2000

09/735698

Holger H. Streckert - Rancho Santa Fe CA
Linden P. Blue - La Jolla CA

General Atomics - San Diego CA

H01M 200

429 34, 429 40, 429 42, 429 26, 204267, 204270, 428570, 428402, 428627, 428634, 700286, 700195

A portable electronic device incorporates PEM fuel cells and is designed to operate by the reaction of hydrogen from a hydride-containing fuel container and oxygen from the air, while efficiently removing the product water by a novel water transportation system. Temperature is effectively controlled by placing a plurality of fuel cell subunits as a generally planar array in the lid of the PC adjacent a heat transfer plate. A particularly efficient resupply system is provided where an electrolyzer that supplies H at a pressure sufficient to continue to power the PC and simultaneously recharge an operatively-connected container and a second spare container in the electrolyzer.

6037697, Mar 14, 2000

Jan 18, 1999

9/232953

Lester LeRoy Begg - San Diego CA
Holger Heinrich Streckert - Rancho Santa Fe CA

General Atomics - San Diego CA

H02N 300, H02N 1000

310306

A multiple cell thermionic converter having a generally tubular member of electrically conductive refractory metal with an internal cavity and a tubular envelope of electrically conductive refractory metal disposed in surrounding relationship to such generally tubular member. Electrically insulating ceramic material is disposed upon sections of facing surfaces of the envelope and tubular member, which is in the form of a body that has a central zone of plasma-sprayed refractory metal oxide selected from the group consisting of scandia, hafnia, zirconia and alumina, and a pair of flanking outer zones made of mixtures of the refractory oxide and particulate refractory metal. Refractory metal electron emitters and collectors are supported upon the ceramic bodies and juxtaposed in pairs with an annular gap therebetween to form a plurality of thermionic cells. A thin tube of refractory metal is bonded to the ceramic body by hot isostatic pressing, which also densifies the ceramic, and then machined to create spaced-apart emitters/collectors. Connectors connect the collector of one thermionic cell to the emitter of the adjacent cell to form a series interconnection with the emitter of the cell at one end and the collector of the cell at the opposite end being provided by a second section of the tubular member and the tubular envelope.

6065284, May 23, 2000

Feb 20, 1998

9/027361

Mervyn H. Horner - Del Mar CA
Holger H. Streckert - Rancho Santa Fe CA

General Atomics - San Diego CA

G21D 100

602031

An Integrated Solar Upper Stage receiver is shown for efficiently transferring heat from concentrated solar flux to an interior surface of an annular structure having a plurality of parallel passageways through which hydrogen gas flows and is heated to a high temperature to serve as a propellant in order to raise the ISUS from a low earth orbit to a geosynchronous orbit or the like. The receiver comprises a body of refractory material, such as graphite, in which each of the hydrogen flow passageways is lined with a thin tube of wrought rhenium metal. The exterior surfaces of the receiver are similarly clad with wrought rhenium, or coated with CVD rhenium, to prevent evaporation of graphite at high temperatures in outer space. Inlet and outlet manifolds which communicate with the rhenium-lined passageways are also constructed of wrought rhenium metal and serve to totally isolate the hydrogen from the graphite heat sink material so as to avoid chemical reaction therebetween. Hydrogen gas from a cryogenic source is thus heated and expanded, serving as a propellant when exhausted through a nozzle.

6181049, Jan 30, 2001

Feb 12, 1999

9/249950

Holger H. Streckert - Rancho Santa Fe CA
Daniele Pelessone - San Diego CA

General Atomics - San Diego CA

H02N 300

310306

A multiple cell thermionic converter having a generally tubular member of electrically conductive refractory metal with an internal cavity and a coaxial tubular envelope of electrically conductive refractory metal disposed in surrounding relationship thereto. Bodies of electrically insulating ceramic material disposed on elongated sections of facing surfaces of the tubular member and the envelope support juxtaposed emitters and collectors to provide a series of thermionic cells. Tubular metal connectors having particular aperture patterns respectively join the collector of one cell to the emitter of the next adjacent cell to create a series electrical interconnection. The aperture patterns include sets of slots in a pair of parallel planes that are perpendicular to the axis, providing necessary flexibility to accommodate thermal expansion and contraction while providing low electrical resistance and long fatigue life. Axial keyhole apertures and auxiliary slits located in a central plane may also be included.

6939449, Sep 6, 2005

Dec 24, 2002

10/328665

Holger H. Streckert - Rancho Santa Fe CA, US
Linden P. Blue - La Jolla CA, US

General Atomics - San Diego CA

C25B001/08

204258

An electrolyzer for generating hydrogen by the electrolytic dissociation of water employs anode and cathode half-cells, separated by a planar polymer-based solid electrolyte, and includes a water reservoir for independently maintaining a desired level of water in the anode and cathode half-cells. A hydrogen exit chimney extends vertically upward from each cathode half-cell and enters a separation chamber; a gas exit passageway therefrom is closed by a separation membrane that allows the passage of Hbut rejects liquid HO, while a return water passageway enters near the bottom of the cathode half-cell. The half-cells are preferably formed by molded plastic frames that are arranged as a cell stack containing a plurality of electrolytic cells, with flat metal anodes and cathodes being respectively sandwiched about the solid electrolyte membrane in each cell. A pair of flat crushable metal plates are located at each end of the cell stack adjacent a pair of pressure plates that exert axial squeezing pressure to seal the cells. Specially designed, dual metal-hydride cartridges are used to provide larger quantities of Hfrom a single cartridge; a high temperature metal hydride is provided in a rear region of the cartridge that is heated by an electrical resistance heater to a temperature of about 200° C.