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Ramakrishna Mallina Phones & Addresses

  • Mason, OH
  • 32 Sterling Heights Dr, Clifton Park, NY 12065 (518) 371-0681
  • Newark, DE
  • 10 Downing Sq, Guilderland, NY 12084
  • 165 Tracy Pl, Hackensack, NJ 07601
  • Hockessin, DE
  • 10 Downing Sq APT F, Guilderland, NY 12084

Publications

Us Patents

Heat Sink And Cooling And Packaging Stack For Press-Packages

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US Patent:
7817422, Oct 19, 2010
Filed:
Aug 18, 2008
Appl. No.:
12/193441
Inventors:
Satish Sivarama Gunturi - Albany NY, US
Mahadevan Balasubramaniam - Ballston Lake NY, US
Ramakrishna Venkata Mallina - Clifton Park NY, US
Richard Alfred Beaupre - Pittsfield MA, US
Le Yan - Schenectady NY, US
Richard S. Zhang - Rexford NY, US
Ljubisa Dragoljub Stevanovic - Clifton Park NY, US
Adam Gregory Pautsch - Rexford NY, US
Stephen Adam Solovitz - Portland OR, US
Assignee:
General Electric Company - Niskayuna NY
International Classification:
H05K 7/20
US Classification:
361699, 257714, 174 151, 165 804, 16510433
Abstract:
A heat sink for directly cooling at least one electronic device package is provided. The electronic device package has an upper contact surface and a lower contact surface. The heat sink comprises a cooling piece formed of at least one thermally conductive material. The cooling piece defines multiple inlet manifolds configured to receive a coolant and multiple outlet manifolds configured to exhaust the coolant. The inlet and outlet manifolds are interleaved. The cooling piece further defines multiple millichannels configured to receive the coolant from the inlet manifolds and to deliver the coolant to the outlet manifolds. The millichannels and inlet and outlet manifolds are further configured to directly cool one of the upper and lower contact surface of the electronic device package by direct contact with the coolant, such that the heat sink comprises an integral heat sink.

Advanced And Integrated Cooling For Press-Packages

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US Patent:
20100038774, Feb 18, 2010
Filed:
Aug 18, 2008
Appl. No.:
12/193429
Inventors:
Richard S. Zhang - Rexford NY, US
Richard Alfred Beaupre - Pittsfield MA, US
Ramakrishna Venkata Mallina - Clifton Park NY, US
Arun Virupaksha Gowda - Rexford NY, US
Le Yan - Schenectady NY, US
Ljubisa Dragoljub Stevanovic - Clifton Park NY, US
Peter Morley - Fort Hunter NY, US
Stephen Adam Solovitz - Portland OR, US
Assignee:
GENERAL ELECTRIC COMPANY - SCHENECTADY NY
International Classification:
H01L 23/34
US Classification:
257714, 257E2308
Abstract:
A heat sink for cooling at least one electronic device package is provided. The electronic device package has an upper contact surface and a lower contact surface. The heat sink comprises at least one thermally conductive material and defines multiple inlet manifolds configured to receive a coolant, multiple outlet manifolds configured to exhaust the coolant, and multiple millichannels configured to receive the coolant from the inlet manifolds and to deliver the coolant to the outlet manifolds. The manifolds and millichannels are disposed proximate to the respective one of the upper and lower contact surface of the electronic device package for cooling the respective surface with the coolant.

Method And Instruments For The On-Line Detection, Sizing Or Analysis Of Aerosol Particles

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US Patent:
62591010, Jul 10, 2001
Filed:
Sep 23, 1997
Appl. No.:
8/935944
Inventors:
Anthony S. Wexler - Newark DE
Murray V. Johnston - Newark DE
Peter Carson - Mays Landing NJ
Ramakrishna Mallina - Newark DE
Assignee:
University of Delaware - Newark DE
International Classification:
H01J 4900
H01J 4910
US Classification:
250423P
Abstract:
The present invention is a method for detecting, sizing or otherwise analyzing aerosol particles wherein a beam of radiation (e. g. , electromagnetic radiation) interacts with one or more particles in a beam of particles that are traveling in a colinear fashion with the beam of radiation. When the beam of radiation interacts with a particle in the beam of particles, it causes that particle to emit either mass or energy. That mass or energy is then detected by one or more detectors or sensors which provide data that permit the particle to be detected, sized or otherwise analyzed (e. g. , the chemical composition of the particle can be determined). The present invention also includes instruments that use the above-described method.

Aerodynamic Nozzle For Aerosol Particle Beam Formation Into A Vacuum

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US Patent:
55656773, Oct 15, 1996
Filed:
Aug 4, 1995
Appl. No.:
8/511549
Inventors:
Anthony S. Wexler - Newark DE
Murray V. Johnston - Newark DE
Ramakrishna Mallina - Newark DE
Assignee:
The University of Delaware - Newark DE
International Classification:
H01J 4104
US Classification:
250251
Abstract:
An aerodynamic nozzle for aerosol particle beam formation into a vacuum comprises a tubular column having a first stage section with a plurality of spaced aerodynamic lenses therein so that an aerosol entering the inlet end of the first stage section is formed into a beam of generally aligned particles. The beam exits the first stage section through an outlet orifice into a second stage section also having a plurality of spaced aerodynamic lenses to maintain the aerosol in its beam form. The beam then exists through a nozzle to an orifice at the discharge end of the second stage section into an evacuated region. The pressure decreases from the first stage (which is preferably at atmospheric pressure) to the second stage to the evacuated region.

Circumferentially Varying Axial Compressor Endwall Treatment For Controlling Leakage Flow Therein

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US Patent:
20160169017, Jun 16, 2016
Filed:
Dec 16, 2014
Appl. No.:
14/572119
Inventors:
- Schenectady NY, US
John David Stampfli - Greer SC, US
Ramakrishna Venkata Mallina - Clifton Park NY, US
Vittorio Michelassi - Munich, DE
Giridhar Jothiprasad - Clifton Park NY, US
Ajay Keshava Rao - Bangalore, IN
Rudolf Konrad Selmeier - Fahrenzhausen, DE
Sungho Yoon - Munich, DE
Ivan Malcevic - Schenectady NY, US
International Classification:
F01D 11/00
F02C 3/04
Abstract:
A compressor for a gas turbine engine including one or more endwall treatments for controlling leakage flow and circumferential flow non-uniformities in the compressor. The compressor includes a casing, a hub, a flow path formed between the casing and the hub, a plurality of blades positioned in the flow path, and one or more circumferentially varying end-wall treatments formed in an interior surface of at least one of the casing or the hub. Each of the one or more circumferentially varying endwall treatments circumferentially varying based on their relative position to an immediately adjacent upstream bladerow. Each of the one or more endwall treatments is circumferentially varied in at least one of placement relative to the immediately adjacent upstream bladerow or in geometric parameters defining each of the plurality of circumferentially varying endwall treatments. Additionally disclosed is an engine including the compressor.

Compressor End-Wall Treatment With Multiple Flow Axes

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US Patent:
20160153360, Jun 2, 2016
Filed:
Dec 1, 2014
Appl. No.:
14/556315
Inventors:
- Schenectady NY, US
Ramakrishna Venkata Mallina - Clifton Park NY, US
John David Stampfli - Greer SC, US
Rudolf Konrad Selmeier - Fahrenzhausen, DE
Davide Giacché - Munich, DE
International Classification:
F02C 7/28
F04D 29/40
F02C 3/04
F04D 19/02
Abstract:
A compressor is provided including a casing, a hub, a flow path, a plurality of blades, and an end-wall treatment formed in at least one of the casing and the hub, and facing a tip of each blade. The flow path is formed between the casing and the hub, and the plurality of blades is positioned in the flow path. The tip of each blade and the end-wall treatment are configured to move relative to each other. Such end-wall treatment includes a first recess portion extending along a first axis to maintain a fluid flow substantially straight through the first recess portion. The end-wall treatment further includes a plurality of second recess portions spaced apart from each other and extending from the first recess portion along a second axis different than the first axis to maintain the fluid flow substantially straight through the plurality of second recess portions.

Axial Compressor Endwall Treatment For Controlling Leakage Flow Therein

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US Patent:
20160153465, Jun 2, 2016
Filed:
Dec 1, 2014
Appl. No.:
14/556452
Inventors:
- Schenectady NY, US
John David Stampfli - Greer SC, US
Ramakrishna Venkata Mallina - Clifton Park NY, US
Vittorio Michelassi - Munich, DE
Giridhar Jothiprasad - Clifton Park NY, US
Ajay Keshava Rao - Bangalore, IN
Rudolf Konrad Selmeier - Fahrenzhausen, DE
Davide Giacché - Munich, DE
Ivan Malcevic - Schenectady NY, US
International Classification:
F04D 29/52
F02C 3/04
F01D 11/08
Abstract:
An axial compressor for a gas turbine engine including one or more endwall treatments for controlling leakage flow in the compressor. The one or more endwall treatments having a height formed in an interior surface of a compressor casing or a compressor hub and configured to return a flow adjacent a plurality of rotor blade tips or a plurality of stator blade tips to a cylindrical flow passage upstream of a point of removal of the flow. Each of the endwall treatments defining a front wall, a rear wall, an outer wall extending between the front wall and the rear wall, an axial overhang, an axial overlap, an axial lean angle and a tangential lean angle. The axial overhang extending upstream to overhang at least one of the at least one set of rotor blades or the at least one set of stator blades. The axial overlap extending downstream to overlap at least one of the at least one set of rotor blades or the at least one set of stator blades.
Ramakrishna V Mallina from Mason, OH, age ~53 Get Report