Siddharth B Pratap

20110065161, Mar 17, 2011

Sep 14, 2010

12/881748

Alexis Kwasinski - Austin TX, US
Sung Woo Bae - Austin TX, US
Mark M. Flynn - Austin TX, US
Robert E. Hebner - Austin TX, US
Michael D. Werst - Manor TX, US
Siddharth B. Pratap - Austin TX, US
Aaron S. Williams - Round Rock TX, US

BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM - Austin TX

G05F 3/08
H02J 1/00
C12N 13/00
C02F 1/48
A23L 3/32

4351731, 323311, 307 43, 21074801, 426237

A high-voltage bipolar rectangular pulse generator using a high efficiency solid-state boosting front-end and an H-bridge output stage is described. The topology of the circuit generates rectangular pulses with fast rise time and allows easy step-up input voltage. In addition, the circuit is able to adjust positive or negative pulse width, dead-time between two pulses, and operating frequency. The intended application for such circuit is algae cell membrane rupture for oil extraction, although additional applications include biotechnology and plasma sciences medicine, and food industry.

52104524, May 11, 1993

Aug 6, 1991

7/741062

Siddharth B. Pratap - Austin TX
Mike L. Spann - Austin TX
W. Alan Walls - Austin TX

Board of Regents, The University of Texas System - Austin TX

H02K 100

310 12

A high-energy output, air-core pulsed alternator utilizes stacked armature coils mounted on the outer periphery of an armature rotor. The stacked coils are symmetrically arranged with respect to one another so as to balance axial or longitudinal forces exerted upon the rotor for high energy pulsed output. The alternator may also include any load device which requires high energy output such as, but not limited to, an electromagnetic railgun.

H13897, Jan 3, 1995

Apr 19, 1993

8/049279

William F. Weldon - Austin TX
Siddharth Pratap - Austin TX

The United States of America as represented by the Secretary of the Army - Washington DC

F41B 600

89 8

An augmented electromagnetic accelerator apparatus which imparts an initial elocity to a projectile by use of enhanced inductance gradients and allows for the use of cylindrical projectiles by the use of a round bore, using a parallel gun rail geometry The enhanced inductance gradients are achieved by the use of an extra turn around the gun rails and enclosing the rail and the said augmented turn in laminated iron. The augmented accelerator has crossovers at the two ends (breech and muzzle end) which have minimum influences over the electromagnetics in the bore of the accelerator.

49357085, Jun 19, 1990

Mar 25, 1987

7/030890

William F. Weldon - Austin TX
Mircea D. Driga - Austin TX
Siddharth B. Pratap - Austin TX

Board of Regents, The University of Texas Systems - Austin TX

H02P 914

322 62

A machine is disclosed having the ability to generate high energy pulses of electrical power with a high degree of flexibility in the shape of the pulse. Different mechanism provide non-uniform or non-symmetrical magnetic flux density distributions through which an armature winding is rotated. The electromotive force induced in the armature winding has a waveform which may be customized by use of the different mechanisms or by a combination of the techniques. Additionally, a non-symmetrical armature winding or a compensation winding may be used to tailor the output pulse to achieve the desired characteristics.

48412171, Jun 20, 1989

Dec 14, 1987

7/132596

William F. Weldon - Austin TX
Siddharth B. Pratap - Austin TX
Mircea D. Driga - Austin TX

The University of Texas System - Austin TX

H02K 3900

322 8

A single phase, multipole alternator with inertial and/or electromagnetic energy storage is disclosed. More specifically, the present invention involves a high energy pulsed alternator which is capable of generating a variety of pulse signals by ready modification of the angle between the magnetic axes of the excitation field coil and the compensating coil or conducting shield.

20180051690, Feb 22, 2018

Oct 17, 2017

15/785963

Jason STAIR - Chicago IL, US
Anthony LINDSAY - Geneva IL, US
Michael LEWIS - Austin TX, US
Raymond ZOWARKA - Austin TX, US
Siddharth PRATAP - Austin TX, US
Clay HEARN - Austin TX, US
Charles PENNEY - Round Rock TX, US
Michael WORTHINGTON - Spicewood TX, US
Hsing-Pang LIU - Austin TX, US

GAS TECHNOLOGY INSTITUTE - DES PLAINES IL
BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM - AUSTIN TX

F04B 49/06
F04B 35/04
F04B 25/02
F04B 31/00

A linear motor compressor including a compressor housing and a cylinder housing having a plurality of opposing compression chambers. A piston freely reciprocates within the cylinder housing using a linear electric motor. A piston position feedback control system provides adaptive current output as a function of position feedback and/or velocity feedback from the piston and/or the electric motor, to directly power and control the electric motor, wherein the piston reciprocates without assistance from a mechanical spring or other equivalent centering force.

20170362923, Dec 21, 2017

May 26, 2017

15/606266

- Austin TX, US
Mukul M. Sharma - Austin TX, US
Michael D. Werst - Manor TX, US
Clay Hearn - Austin TX, US
Michael Worthington - Spicewood TX, US
Jon Hahne - Georgetown TX, US
Hsing-Pang Liu - Austin TX, US
Bryan Bunkowski - Austin TX, US
Siddharth Pratap - Orange CA, US

E21B 43/24
E21B 43/12
F16H 25/20
H01F 7/02

Described herein are methods and system that use electromagnetic heating to heat wellbores and the fluids therein. The heating is achieved by placing one or more permanent magnets in the wellbore and moving a metallic component and/or the one or more permanent magnets relative to each other. This generates eddy currents in the metallic component, which heat the metallic component. This heat is transferred to the fluids in the wellbore from the metallic component by convection. In some embodiments, permanent magnets are installed in the tubing to induce eddy current heating in a well by converting the linear motion of a sucker rod to rotary motion of a conducting tube using a lead or ball screw. The heater may directly integrate with existing pump jack equipment with little or no additional infrastructure required.

20170304926, Oct 26, 2017

Apr 25, 2017

15/496606

- Austin TX, US
Ben Rech - Austin TX, US
Joe Koo - Austin TX, US
Jon Hahne - Georgetown TX, US
David N. Prater - Austin TX, US
Charles E. Penney - Round Rock TX, US
Bryan Bunkowski - Austin TX, US
Siddharth Pratap - Orange CA, US

B23K 11/24
H02K 5/16
H02K 5/14
B23K 11/02
F16C 19/18
B23K 11/00
F16C 27/04
H02K 31/02
F16C 33/32
B23K 101/28

Described herein are methods and system for welding, for example, girders. The method may include activating a homopolar generator. The method may include applying a force to two metal girders at a desired coupling joint. The method may include generating an electrical pulse using the homopolar generator and conducting the electrical pulse to the desired coupling joint to increase a temperature of the girders. The method may include forming a weld at the desired coupling joint attaching the two metal girders at the desired coupling joint. In some embodiments, the homopolar generator may include a radial bearing rotor including a rotatable shaft and a bearing assembly. The bearing assembly may include nonmagnetic bearings. The homopolar generator may include a field coil. The homopolar generator may include a brush actuation mechanism which when activated engages a plurality of brush devices to the radial bearing rotor.