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David G Elpern

from Lexington, KY
Age ~77
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Also known as:
David George Elpern, Dave G Elpern, David G Elperin, Patricia Elpern
Phone and address:
1306 Fincastle Rd, Lexington, KY 40502
(213) 383-4241
Related to:
Patricia Kwik Elpern, 77
Connected to:
Andrew J Elpers, 41Joseph G Elpers, 58Kim M Elpers, 67Robert E Elpers, 68Kimberly Elphick, 67Ryan Z Elphick, 31Eyad M Elqaq, 57Lawrence H Elrad, 67Marcos Elrahi, 35Wesam Elramady, 49

David Elpern Phones & Addresses

  • 1306 Fincastle Rd, Lexington, KY 40502 (213) 383-4241
  • Los Angeles, CA

Professional Records

Medicine Doctors

David Elpern Photo 1

David J. Elpern

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Specialties:
Dermatology
Work:
David J Elpern MD
12 Mdw St, Williamstown, MA 01267
(413) 458-2800 (phone), (413) 458-4224 (fax)
Education:
Medical School
New York University School of Medicine
Graduated: 1970
Procedures:
Destruction of Benign/Premalignant Skin Lesions
Destruction of Skin Lesions
Skin Surgery
Skin Tags Removal
Conditions:
Acne
Alopecia Areata
Atopic Dermatitis
Contact Dermatitis
Dermatitis
Languages:
English
Description:
Dr. Elpern graduated from the New York University School of Medicine in 1970. He works in Williamstown, MA and specializes in Dermatology.
David Elpern Photo 2

David J Elpern

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Specialties:
Dermatology
Allergy & Immunology
Family Medicine
Education:
New York University (1970)

Publications

Us Patents

Adjustable Flow Turbine Nozzle

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US Patent:
7165936, Jan 23, 2007
Filed:
Aug 16, 2004
Appl. No.:
10/919662
Inventors:
David G. Elpern - Los Angeles CA, US
Assignee:
Honeywell International, Inc. - Morristown NJ
International Classification:
F01D 25/02
US Classification:
415155, 415202
Abstract:
A multiple-passage turbine nozzle with desired predetermined flow properties may be provided with an adjustment member in one or more of its passages to limit the flow therethrough. Turbine nozzle flow is an important performance characteristic that may be difficult to control by conventional drilling or machining manufacturing methods. The adjustment member may protrude into a nozzle passage, thereby reducing airflow through the nozzle passage. The amount of protrusion is variable and is selected to provide a desired partial or total occlusion of an associated passage at the time of manufacture of the turbine nozzle to compensate for variations produced by the conventional manufacturing techniques. The turbine nozzle according to the present invention provides simple and convenient calibrated adjustment of the predetermined flow that may be allowed to pass through a turbine nozzle onto a turbine wheel of a turbo machine.

Method For Predicting Air Cycle Machine Turbine Ice Formation And Shedding And Journal Bearing Wear

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US Patent:
7502717, Mar 10, 2009
Filed:
Apr 18, 2006
Appl. No.:
11/406565
Inventors:
David G. Elpern - Los Angeles CA, US
Sunil K. Menon - Golden Valley MN, US
Alex Morando - Rowland Heights CA, US
Girija Parthasarathy - Maple Grove MN, US
Jon E. Schryver - Redondo Beach CA, US
Assignee:
Honeywell International Inc. - Morristown NJ
International Classification:
G06F 17/00
G06F 17/40
US Classification:
702183, 702 34, 701 14
Abstract:
Methods and apparatus are provided for predicting ice formation on and shedding from blades of an air cycle machine (“ACM”) turbine. The method comprises generating operational condition data representative of ACM turbine operating conditions using a software model of the ACM, determining an amount of ice formation on the blades of the ACM turbine, and determining an amount of ice shed from the blades of the ACM turbine. The apparatus comprises means for generating operational condition data representative of ACM turbine operating conditions using a software model of the ACM, means for determining an amount of ice formation on the blades of the ACM turbine, and means for determining an amount of ice shed from the blades of the ACM turbine. In some embodiments, the means and apparatus may also involve predicting ACM wear, based at least in part on the predicted ice formation and shedding.

Compressor Ported Shroud For Foil Bearing Cooling

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US Patent:
7988426, Aug 2, 2011
Filed:
Jan 10, 2005
Appl. No.:
11/032418
Inventors:
David G. Elpern - Los Angeles CA, US
Niall McCabe - Torrance CA, US
Mark Gee - South Pasadena CA, US
Assignee:
Honeywell International Inc. - Morristown NJ
International Classification:
F03B 11/06
F01D 25/16
US Classification:
417 53, 417407, 415112, 415229, 416174
Abstract:
A compressor ported shroud takes compressed air from the shroud of the compressor before it is completely compressed and delivers it to foil bearings. The compressed air has a lower pressure and temperature than compressed outlet air. The lower temperature of the air means that less air needs to be bled off from the compressor to cool the foil bearings. This increases the overall system efficiency due to the reduced mass flow requirements of the lower temperature air. By taking the air at a lower pressure, less work is lost compressing the bearing cooling air.

Three Bearing Flexible Shaft For High Speed Turbomachinery

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US Patent:
8376690, Feb 19, 2013
Filed:
Dec 8, 2009
Appl. No.:
12/633591
Inventors:
Marshall Saville - Torrance CA, US
David G. Elpern - Los Angeles CA, US
Assignee:
Honeywell International Inc. - Morristown NJ
International Classification:
F01D 15/08
US Classification:
4151242, 415 60, 4152161, 416244 A
Abstract:
A three journal bearing supported shaft with a link between two of the bearings may allow for longer spacing between the wheels supported by the shaft. The flexible shaft may move one bending critical speed below the minimum operating speed of the shaft and the next bending critical speed above the maximum operating speed of the shaft, thus extending the speed range significantly. A tie rod may be used as the link in the shaft.

Low Energy Electric Air Cycle With Portal Shroud Cabin Air Compressor

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US Patent:
20070113579, May 24, 2007
Filed:
Jul 29, 2005
Appl. No.:
11/192970
Inventors:
Henry Claeys - Lomita CA, US
Katherine Clarke - Hermosa Beach CA, US
David Elpern - Los Angeles CA, US
International Classification:
F25D 9/00
US Classification:
062401000, 062402000
Abstract:
An environmental control system for an aircraft cabin includes a plurality of electrically-driven ported shroud cabin air compressors, each cabin air compressor compressing ram air received from the aircraft exterior, a heat exchange circuit comprising a primary heat exchanger receiving airflow from at least one of the cabin air compressors, and the secondary heat exchanger supplying airflow to the aircraft cabin, and an air cycle machine comprising a compressor adapted to receive airflow from the primary heat exchanger and supply compressed air to the secondary heat exchanger. The environmental control system may further comprise an air recirculation system, having an aft recirculation fan adapted to receive a portion of recirculation air from the aircraft cabin, and a recirculation heat exchanger, disposed in the heat exchange circuit in series with the primary and secondary heat exchangers, and adapted to receive airflow from the aft recirculation fan.

Light Weight Vaneless Compressor Containment Design

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US Patent:
20110305554, Dec 15, 2011
Filed:
Jun 14, 2010
Appl. No.:
12/814866
Inventors:
ROBERT P. CHEN - TORRANCE CA, US
FRANK LIN - TORRANCE CA, US
DAVID G. ELPERN - LOS ANGELES CA, US
Assignee:
HONEYWELL INTERNATIONAL INC. - MORRISTOWN NJ
International Classification:
F01D 21/00
F04D 29/00
US Classification:
415 1, 4151212
Abstract:
A vaneless compressor containment design has an inner bolt circle with more than three fasteners situated in the vaneless space to cut up tri-hub pieces to smaller pieces prior to reaching an outer bolt circle and its associated flange. This containment design may allow a thinner radial wall thickness for the outermost flange as compared to the conventional design. The thinner radial wall thickness may reduce the weight of the compressor. This weight reduction may be achieved with little or no increase in the compressor space envelope.

Turbocharger Bearing And Lubrication System

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US Patent:
RE342769, Jun 8, 1993
Filed:
Jan 3, 1991
Appl. No.:
7/637239
Inventors:
Jerry Glaser - Playa Del Rey CA
David G. Elpern - Los Angeles CA
Assignee:
Allied-Signal Inc. - Morristown NJ
International Classification:
F04B 1700
F04B 3504
US Classification:
417407
Abstract:
The rotating components of an exhaust gas driven turbocharger are supported by a pair of axially separated ball bearings having an outer race and an inner race. A spacer between the bearings engages the outer race of both bearings and exerts a preload bias on the outer races of the bearings urging the outer races away from one another. Accordingly the bearings are preloaded so that centrifugal forces generated during high speed operation will not force the ball bearing away from the inner races.

Turbocharger Heat Transfer Control Method And Apparatus

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US Patent:
47173181, Jan 5, 1988
Filed:
Jul 11, 1986
Appl. No.:
6/884317
Inventors:
David G. Elpern - Los Angeles CA
Assignee:
The Garrett Corporation - Los Angeles CA
International Classification:
F04B 1700
US Classification:
417407
Abstract:
A turbocharger includes spaced apart turbine housing and compressor housing sections which are connected by a center housing section. The center housing section journals an elongate shaft carrying at opposite ends thereof a compressor wheel and a turbine wheel rotatable in the respective housing sections. The center housing section also defines a closed cavity captively receiving a material conductive of heat and which transitions between lower and upper molecular energy levels during hot soak of the turbocharger following engine shutdown to control bearing temperature at the shaft.
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David G Elpern from Lexington, KY, age ~77 Get Report