Borealis Technical Limited

Other

Isonics Corporation

Hans Juergen Walitzki

Jonathan Sidney Edelson

Isaiah Watas Cox

Rodney Thomas Cox

Wing S Luk

An auxiliary drive wheel taxi system for driving an aircraft autonomously without reliance on engine operation during ground travel is designed for installation in an aircraft location other than on nose or main landing gear components. The auxiliary drive wheel taxi system may be mounted in an integral housing located internally or externally on an aircraft's body at a selected location relative to main or nose landing gears and includes one or more auxiliary drive wheels mounted on an extensible strut adapted to extend from and retract into the housing. An electric, hydraulic, or pneumatic non-engine drive means controllable to provide torque required to rotate the drive wheel and drive the aircraft at desired taxi speeds may be mounted in a selected location to drive the auxiliary drive wheel. The manually or automatically controllable auxiliary taxi system is operable only to drive the aircraft during taxi.

Aircraft auxiliary drive wheel taxi system

A drive system with harmonic drive designed to meet the high power and torque requirements required to drive an aircraft independently on the ground is provided. The drive system includes an electric motor driven by a harmonic drive assembly that may be configured to be integral with the motor. This drive system with harmonic drive can be effectively installed in an existing aircraft nose wheel or main wheel without changes to other components.

Drive system with harmonic drive for self-propelled aircraft wheel

The invention disclosed is a self-propelled aircraft undercarriage for driving an aircraft on the ground, comprising: an axle; a strut supporting said axle; at least one wheel rotatably mounted on said axle; and drive means for driving said at least one wheel; characterized in that said drive means is disk shaped and is external to said wheel. In one embodiment of the invention, said drive means is mounted on said axle between said strut and said wheel. In a second embodiment, said drive means is mounted on said axle, on the side of said wheel furthest from said strut.

Motor for driving aircraft, located adjacent to undercarriage wheel

An improved efficiency thin film solar cell is disclosed. Nanoscale indentations or protrusions are formed on the cross sectional surface of a carrier layer, onto which a thin metal film is deposited. Additional layers, including semiconductor absorber and collector layers and a window layer, are disposed on the metal film, thereby completing the solar cell. The nanostructure underlying the metal film serves to reduce the work function of the metal and thereby assists in the absorption of holes created by solar photons. This leads to more efficient electricity generation in the solar cell. In a further embodiment of the present invention the cross sectional surface of the semiconductor absorber layer is also modified by nanoscale indentations or protrusions. These indentations or protrusions have the effect of altering the size of the semiconductor band gap, thereby optimizing the radiation absorption properties of the solar cell.

Thin film solar cell

A thermionic or thermotunneling converter consisting of two electrodes maintained at a desired distance from one another by means of spacers in which the electrodes comprise silicon coated with a hard material, or comprise a ceramic or other refractory material. The spacers are formed by oxidizing one electrode, protecting certain oxidized areas and removing the remainder of the oxidized layer. The protected oxidized areas remain as spacers. These spacers have the effect of maintaining the electrodes at a desired distance without the need for active elements, thus greatly reducing costs.

Thermionic/thermotunneling thermo-electrical converter

A starter/generator machine for a turbine with a turbine enclosure, an air duct, and a plurality of fan blades is provided. The starter/generator machine includes a plurality of stator elements spaced at intervals in a ring shape adjacent to the air duct and a plurality of rotor elements mounted on the fan blades. The stator elements and the rotor elements are mounted to interact magnetically to exert a force sufficient to move the rotor elements. The stator elements are shaped to minimize air flow interference and are formed with a core, at least one pole, and multiple windings. The spacing between the stator elements and the rotor elements forms an air gap on the order of 5-10 mm, and the number of stator elements is different from the number of rotor elements.

Integrated direct drive starter/generator for turbines

A thermionic or thermotunneling generator or heat pump is disclosed, comprising electrodes substantially facing one another and separated by spacers disposed between the electrodes, wherein the substrate material for the cathode is preferably a single crystalline silicon wafer while the substrate for the anode is an organic wafer, and preferably a polished polyimide (PI) wafer. On the cathode side, standard silicon wafer processes create the 10-1000 nm thin spacers and edge seals from thermally grown oxide. Either wafer is partially covered with a thin film of material that is characterized by high electrical conductivity and low work function. In one embodiment, the cathode is partially covered with a thin film of Ag&#x2014;Cs&#x2014;O. In another embodiment, the anode is additionally covered with a thin film of Ag&#x2014;Cs&#x2014;O, in which case the work function of the cathode coating material is reduced further utilizing an Avto Metal structure of nanoscale patterned indents. A method for fabricating the composite structure device is further disclosed.

Composite structure gap-diode thermopower generator or heat pump

A thermionic converter is disclosed comprising a single or multiple hot (emitter) and cold (collector) electrodes mounted side-by-side on a single substrate and a static electrostatic field for guiding electron from the emitter to the collector. The thermal path between emitter and collector electrodes is interrupted by cuts or trenches, and electrical connections to the electrodes are routed over a meander-like, high thermal resistance pathway cut into the substrate to further reduce thermal loss. In one embodiment, there is an Avto metal surface texture of nanoscale indents on one or more of the electrodes to lower a work function. A method for fabricating the monolithic thermionic converter is further disclosed.

Monolithic thermionic converter

A thermionic or thermotunneling gap diode device consisting of two silicon electrodes maintained at a desired distance from one another by means of spacers. These spacers are formed by oxidizing one electrode, protecting certain oxidized areas and removing the remainder of the oxidized layer. The protected oxidized areas remain as spacers. These spacers have the effect of maintaining the electrodes at a desired distance without the need for active elements, thus greatly reducing costs.

Thermal tunneling gap diode with integrated spacers and vacuum seal

The present invention provides a method and apparatus for lift-off of a thin layer from a crystalline substrate, preferably the layer from a silicon wafer to further form a silicon-on-insulator (SOI) sandwich structure, wherein a separation layer is formed inside a donor wafer by trapping hydrogen into a preformed, buried defect-rich layer preferably obtained by implanting a low dose of light ions through a protective layer deeply into this donor wafer. The donor wafer is then bonded to a second wafer and then split at the separation layer using a splicing apparatus. The invention also provides a 'Wide Area Ion Source' (WAIS) that performs both implants in a very cost effective manner.

Growing community of inventors

Portland, OR, United States of America

Hans Juergen Walitzki