Kirankumar M Kothari
Engineers at Haman Ave, Hoffman Estates, IL

License number
Colorado 19277
Issued Date
May 21, 1982
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
4215 Haman Ave, Hoffman Estates, IL 60192

Personal information

See more information about Kirankumar M Kothari at radaris.com
Name
Address
Phone
Kirankumar M Kothari, age 76
4215 Haman Ave, Hoffman Estates, IL 60195
(847) 358-6243
Kirankumar M Kothari, age 76
4215 Haman Ave, Schaumburg, IL 60195
(847) 358-6243

Professional information

Kirankumar Kothari Photo 1

Fluidic Gas Flowmeter With Large Flow Metering Range

US Patent:
5339695, Aug 23, 1994
Filed:
May 1, 1992
Appl. No.:
7/877147
Inventors:
Sukhvinder S. Kang - Rochester MN
Bharatan R. Patel - Etna NH
William E. Nutt - Enfield NH
Kirankumar K. Kothari - Hoffman Estates IL
Assignee:
Gas Research Institute - Chicago IL
International Classification:
G01F 700, G01F 120
US Classification:
7386119
Abstract:
The present invention provides a wide range fluid flowmeter, having a body with a central air flow passage and a target in the air flow passage to direct fluid flow to one of the first and second flow loops. The fluid alternates between the first and second flow loops to create an oscillatory system, whose frequency can be measured to determine fluid flow rate. A preferred frequency measuring device is a piezoelectric diaphragm provided within the body of the flowmeter. In a preferred embodiment, a low flow rate sensor is provided in a nozzle of the flowmeter proximal the inlet to the body of the oscillatory, high flow rate flowmeter. The low flow rate sensor can incorporate a convection system which measures flow rates beyond the lower scale of the oscillatory flowmeter, thereby providing an apparatus and a method for measuring flow rates in a compact flowmeter, and with greater efficiency than previous apparatuses and methods. In its preferred embodiment, the low flow rate sensor is a time-of-flight (TOF) sensor provided in a constricted nozzle proximal the inlet to the oscillatory flowmeter.


Kirankumar Kothari Photo 2

Gas Flowmeter Using Thermal Time-Of-Flight Principle

US Patent:
5347876, Sep 20, 1994
Filed:
Jan 7, 1992
Appl. No.:
7/817656
Inventors:
Sukhvinder S. Kang - Rochester MN
Bharatan R. Patel - Etna NH
Kirankumar M. Kothari - Hoffman Estates IL
Assignee:
Gas Research Institute - Chicago IL
International Classification:
G01F 168, G01F 700
US Classification:
7386195
Abstract:
A temperature time-of-flight (TOF) sensor is combined with a nozzle of known flow area to create a TOF flowmeter. The TOF measured by the flow sensor provides a measure of gas volumetric flow rate. A TOF sensor has of a pulse heated wire and a single temperature sensor downstream of the wire. This single temperature sensor arrangement allows the accurate measurement of gas velocities much lower than the previously demonstrated limit of 0. 3 m/s. The TOF sensor combined with a nozzle creates a new device such that the TOF measured with this device provides a measure of the gas flow rate rather than just the gas velocity. More than one nozzle in series is combined to achieve high flow measuring ranges. Compensation for variations in the thermophysical properties of the gas being metered is provided by pulsing the heated wire and measuring sensor outputs when both are immersed in the gas at zero velocity.


Kirankumar Kothari Photo 3

Obstacle Detection System For Underground Operations

US Patent:
7013991, Mar 21, 2006
Filed:
Aug 17, 2004
Appl. No.:
10/919748
Inventors:
Alan Wilson-Langman - Milnerton, ZA
Michael R. Inggs - Simons Town, ZA
Leendert Johannes du Toit - Somerset-West, ZA
Kirankumar M. Kothari - Hoffman Estates IL, US
David R. Hanson - Pella IA, US
Assignee:
Gas Technology Institute - Des Plaines IL
International Classification:
E21B 44/06
US Classification:
175 48, 175 40
Abstract:
An obstacle avoidance system for obstacle detection in an opaque material. The system includes at least one electromagnetic signal source adapted to produce an electromagnetic source signal suitable for transmission through the opaque material, at least one electromagnetic signal detector adapted to receive reflected electromagnetic energy signals from discontinuities in the opaque material encountered by the electromagnetic source signal, and a reflected electromagnetic energy signal processor suitable for determining a presence of obstructions and/or strata variations within the opaque material. The system is preferably integral with a head element suitable for traversing the opaque material, for example a subterranean drill bit.


Kirankumar Kothari Photo 4

Wide Concentration Range Gas Detection

US Patent:
7592595, Sep 22, 2009
Filed:
Oct 6, 2006
Appl. No.:
11/545004
Inventors:
Harold S. Lessure - Pittsburgh PA, US
Satoru Simizu - Pittsburgh PA, US
Kirankumar M. Kothari - Hoffman Estates IL, US
Assignee:
Operations Technology Development, NFP - Des Plaines IL
International Classification:
G01J 5/58
US Classification:
25033901
Abstract:
A method and apparatus in which a first absorption measurement is made over a first frequency interval or set of frequency intervals including one or more absorptions from a spectral band of interest. The first absorption measurement is ideally selected to be near the frequency of a peak in the absorption spectrum, providing high sensitivity at low gas concentrations. A second absorption measurement is made over a second frequency interval. The second absorption measurement is made to include a contribution from the broadening of the absorption spectrum at higher concentrations. The second absorption measurement provides sensitivity at higher concentrations. The two absorption measurements are then combined to deduce the target sample concentration as the absorption line spectrum changes shape with concentration.