21 patents
Utility
Dual Core Shoot-through Protection Inductor Topology
18 Jan 24
A shoot-through protection circuit including a first switch connected to a positive bus and connected to a first center node via a first electrical path, a second switch connected to a negative bus and connected to the first center node via a second electrical path, a circuitous third electrical path connecting the first center node to a first load output, a first magnetic core surrounding the first electrical path and the circuitous third electrical path, a second magnetic core surrounding the second electrical path and the circuitous third electrical path, and wherein a polarity of one of the first electrical path and the second electrical path is aligned with a polarity of the circuitous third electrical path within the corresponding one of the first magnetic core and the second magnetic core and a polarity of the other of the first electrical path and the second electrical path opposes the polarity of the circuitous third electrical path within the corresponding one of the first magnetic core and the second magnetic core.
Carl Roger Haynie, Aaron Michael Poehls
Filed: 9 Dec 20
Utility
Fuel-isolation System Having Rupture Diaphragm
19 Oct 23
A fuel-isolation system includes a valve body that defines a flow passage that extends from an inlet to an outlet, a rupture diaphragm in the flow passage and fluidly sealing the inlet from the outlet, and an actuator situated adjacent the rupture diaphragm.
Matthew Jakubek
Filed: 28 Oct 20
Utility
Satellite Including Crossover Power Processing Units for Electric Thrusters
21 Sep 23
A spacecraft propulsion system including a first thruster system including a first power processing unit connected to a first thruster string via a crossover switching unit and connected to a second thruster string via the crossover switching unit.
Brian A. Koch
Filed: 10 Jul 20
Utility
Machine with Paramagnetic Shell and Magnet
17 Aug 23
A machine includes a stator and a rotor that is rotatable with respect to the stator.
Thaddeus Chilcoat, Steven P. Grota, James Tellier
Filed: 9 Jul 20
Utility
Shoot Through Current Detection and Protection Circuit
9 Feb 23
A shoot-through protection circuit includes a current sensor providing a sensor signal connected to a comparator input via at least a burden resistor.
Carl R. Haynie
Filed: 19 Feb 20
Utility
Article with 2D and 3D Fiber Structure
12 Jan 23
An article includes a completed fabric structure that has multiple plies of fiber reinforced fabric.
Russell A. Ellis, Jeffrey D. Haynes
Filed: 20 Feb 20
Utility
Catalyst-containing Material
29 Dec 22
A catalyst-containing material includes a refractory matrix and particles of one or more catalytic metal elements or catalytic oxides.
Edward Wucherer, Benjamin Andrew Glassy
Filed: 25 Nov 19
Utility
Thruster Nozzle Assembly with Flow Regulator In Throat Area and Rotary Joint
15 Dec 22
A nozzle assembly according to an exemplary aspect of the present disclosure includes, among other things, a nozzle including a throat section.
Kevin Mark Noonan, Robert Cooper, Larry Kenneth West
Filed: 10 Dec 19
Utility
Valve Timing System for Liquid Fuel Rockets
8 Dec 22
A liquid fuel rocket engine according to one example includes a combustor, a liquid fuel repository connected to the combustor via a fuel line and a first valve, an oxidizer repository connected to the combustor via an oxidizer line and a second valve, a valve controller configured to output a valve control current to the first valve, the valve controller storing instructions for determining at least one actual minimum impulse bit of a valve based on a current profile and a voltage profile of a single operation of the first valve, and to adjust valve controls to account for the at least one actual minimum impulse bit.
Larry Coady
Filed: 10 Dec 19
Utility
Catalytic Thruster
29 Sep 22
A monopropellant thruster according to an exemplary aspect of the present disclosure includes, among other things, a first part having a catalyst bed, a thrust chamber, and a nozzle.
Vincent C. YARNOT, Steven STANLEY, Garrett URBAN, Matthew T. JAKUBEK, Ronald L. ARGUST
Filed: 22 Nov 19
Utility
Reconfigurable Power Processing Unit for Spacecraft Operations
23 Jun 22
A reconfigurable power processing unit for a spacecraft including a plurality of power modules.
Erich H. Soendker
Filed: 3 Jun 19
Utility
Electric Propulsion System Including Heaterless Dispenser Cathode
26 May 22
A circuit for igniting and sustaining an electron discharge includes an ignitor circuit.
Brian A. Koch
Filed: 1 May 19
Utility
Reduced Vapor-toxicity Hydrazine Composition
27 Jan 22
The hydrazine-containing composition is a liquid mixture that includes from 5 mol % to 95 mol % of unprotonated hydrazine selected from hydrazine, monomoethylhydrazine, dimethylhydrazine, ethylhydrazine, and combinations thereof, and from 5 mol % to 90 mol % of at least one oxygen-containing solute or solvent selected from acetals, acetyls, alcoxyamines having two or more carbon atoms, aldehydes, amides, amides and particularly carboxamides, aminoalcohols, carbazides, semicarbazides, carbon-containing nitrate salts comprising cations with logarithmic dissociation constants less than 9.2, hydroxyalkyl nitro compounds, hydroxyalkylhydrazines, carbonates, carboxylic acids and anhydrides of carboxylic acids, esters, ethers, ketals, ketones, mono- and poly-alcohols in 31% or greater mass fraction, nitrate esters, nitrosamines, sugars, and combinations thereof.
Robert K. Masse
Filed: 24 Jan 19
Utility
Injector with Injector Elements In Circumferential Rows That Alternate Between Counter-clockwise and Clockwise Swirl
25 Nov 21
An injector for a liquid rocket engine includes an array of injector elements.
Yaping (Alan) Huang
Filed: 30 Oct 18
Utility
Pump with Axially-elongated Annular Seal Element Between Inducer and Impeller
4 Nov 21
A pump includes a shaft that is rotatable about a central axis.
Jeff Miller, Steven Grota
Filed: 19 Oct 18
Utility
Hall Thruster with Annular Cathode
3 Jun 21
A Hall thruster includes an annular discharge region and an annular cathode concentric to the annular discharge region.
Justin Pucci
Filed: 19 Dec 17
Utility
Power Converter Including a Recirculating Snubber
25 Mar 21
A power converter includes a first rectifier circuit having a pair of first rectifier circuit output terminals and a second rectifier circuit having a pair of second rectifier circuit output terminals, a snubber circuit comprising a first diode and a first capacitor connected to each other at a first node and connecting the pair of first rectifier circuit output terminals, a second diode and a second capacitor connected to each other at a second node and connecting the pair of second rectifier circuit output terminals, a third diode connecting the first node to one of the pair of second rectifier output terminals, and a fourth diode connecting the second node to one of the pair of first rectifier output terminals.
Bryce L. Hesterman
Filed: 11 Apr 18
Utility
Pump with Housing Having Internal Grooves
6 Jan 21
A pump includes an axial inducer.
Khin Phui, Sen Meng
Filed: 11 Oct 18
Utility
Load Impedance Tester and Measurement Method
9 Dec 20
An impedance measurement circuit includes a signal injector having a voltage input and a voltage output, a controllable switch, and a voltage drop device connected in parallel with the controllable switch between the voltage input and the voltage output.
Bryce L. Hesterman
Filed: 3 Dec 17
Utility
Copper Combustion Chamber Attached to Injector by Non-copper Weld Transition Ring
7 Oct 20
A rocket engine includes a copper alloy combustion chamber, a non-copper weld transition ring welded to the copper alloy combustion chamber, and an injector assembly welded to the non-copper weld transition ring.
Mark J. Ricciardo, Edmund B. Stastny, Lee A. Ryberg
Filed: 8 Oct 18