David M Erickson

US Patent:

7005779, Feb 28, 2006

Filed:

Jun 8, 2004

Appl. No.:

10/863018

Inventors:

David J. Erickson - Liverpool NY, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H01L 41/08

US Classification:

310328

Abstract:

An efficient generator of electrical power employs groups of piezoelectric devices disposed in a radial manner about a centrally located cam. The cam, when rotated by a prime mover as a conventional source of mechanical energy, applies a periodic varying force to each piezoelectric device in a suitable sequence. The devices operate to respond to the rotation of the cam by having a cam follower coupled to each device via a spring, whereby a periodically varying force is applied to each piezoelectric device according to the cam surface and based on the rotation of the cam. Each device produces an output voltage according to the force applied to the device via the cam and the coupling between the device and the cam surface. Each device includes a stack of low loss piezoelectric plates connected together and responsive to the application of a mechanical stress to the stack to produce an electrical output.

US Patent:

7398690, Jul 15, 2008

Filed:

Apr 7, 2006

Appl. No.:

11/400688

Inventors:

David J. Erickson - Liverpool NY, US
Walter Chyrywaty, III - Liverpool NY, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

G01L 11/00

US Classification:

73702

Abstract:

An acoustic pressure sensor includes a stack of one or more acoustically responsive elements which are contained within a housing. An external acoustic pressure to be sensed is transmitted to the stack via a diaphragm which exists in an end cap closing a top portion of the housing. The outer edge of the diaphragm is in direct contact with the outer edge of the housing. This area enhancement increases the basic sensitivity of the sensing stack without the need of a gap. The diaphragm allows flexure to occur in a controlled fashion. The housing is sealed at the top and bottom by end caps, the top end cap defining a diaphragm area, which diaphragm deflects to thereby apply pressure to the stack to convert acoustic signals into electrical signals.

US Patent:

7466066, Dec 16, 2008

Filed:

Nov 7, 2005

Appl. No.:

11/268089

Inventors:

Raymond Porzio - Lafayette NY, US
David J. Erickson - Liverpool NY, US
Todd C. Gloo - Liverpool NY, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H01L 41/04
H01L 41/083

US Classification:

310334, 310328, 31032321

Abstract:

A longitudinally driven slotted transducer has a tubular member with an axial slot extending from one end to the other end. A drive assembly is disposed across the inner wall of the tubular member and supported by journal bearing surfaces extending from opposing sides of the inner wall to locate the drive assembly in a position offset from the longitudinal central axis of the tubular member. The interface between the drive assembly and tubular member comprises a layer of solid lubricant material mounted on the journal bearing type surfaces.

US Patent:

7673831, Mar 9, 2010

Filed:

Jun 8, 2006

Appl. No.:

11/422933

Inventors:

Daniel W. Steele - Clay NY, US
John H. Goodemote - Oneida NY, US
David J. Erickson - Liverpool NY, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

B64C 39/02

US Classification:

244 1TD

Abstract:

Embodiments of the invention are directed to an unmanned air vehicle (UAV) system and a small unmanned air vehicle (SUAV) system for deploying and towing a sensor in a tow medium, and to methods related thereto. A UAV-sensor towing package comprises a fixed-wing UAV including a control and signal processing platform, a long range data RF link operably connected to the control and signal processing platform, a UAV wireless data link operably connected to the control and signal processing platform, and a tow body deployment system operably connected to the control and signal processing platform; a tow line attached at an end thereof to the UAV; a tow body attached to another end of the tow line; and a communications link including a transmitter/receiver component coupled to the tow line, and a T/R wireless data transmission link () operably connected with the transmitter/receiver component and the UAV wireless data link.

US Patent:

7679266, Mar 16, 2010

Filed:

Oct 31, 2008

Appl. No.:

12/262367

Inventors:

Raymond Porzio - Lafayette NY, US
David J. Erickson - Liverpool NY, US
Todd C. Gloo - Liverpool NY, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H01L 41/08

US Classification:

31032302

Abstract:

A transducer comprises a longitudinal tubular member symmetrically disposed about a central longitudinal axis, the tubular member having a slot extending from the front end of said member to the rear end of the member, the slot extending parallel to the central longitudinal axis; a stack comprising a single element or plurality of vibratory elements arranged from a first to a second end and; a mounting arrangement for mounting the said stack across the inner wall of said tubular member on a line relatively transverse to said longitudinal central axis. The mounting arrangement includes a layer of solid lubricant engaging opposite ends of the stack, enabling the stack to move in a direction of the central axis when the stack exhibits vibratory motion.

US Patent:

8552363, Oct 8, 2013

Filed:

Jun 23, 2008

Appl. No.:

12/143952

Inventors:

David Erickson - Ithaca NY, US
Sudeep Mandal - Ithaca NY, US

Assignee:

Cornell University - Ithaca NY

International Classification:

H01S 3/00

US Classification:

250251, 250435, 385129

Abstract:

An optical chromatography system employs fluid filled hollow core fibers, such as photonic crystal fibers (PCFs), which confine an incident optical beam from a laser, for example, in the core and cause separation of particles in the fluid along the length of the PCF. The incident optical beam is confined in the fluid filled core of the PCF by a periodic lattice of air capillaries surrounding the core. The lattice either creates a lower refractive index in the cladding than in the fluid filled core or creates a 1D photonic bandgap structure where the guiding is accomplished by surrounding the fluid filled core with a periodically changing array of dielectric constant which prohibits radial dilution of the optical energy over a range of wavelengths through photonic bandgap effects.

US Patent:

20110039730, Feb 17, 2011

Filed:

Sep 2, 2008

Appl. No.:

12/675370

Inventors:

David Erickson - Ithaca NY, US
Sudeep Mandal - Lee MA, US

Assignee:

CORNELL UNIVERSITY - ITHACA NY

International Classification:

C40B 30/10
C40B 60/12

US Classification:

506 12, 506 39

Abstract:

An optofluidic architecture for label free, highly parallel, detection of molecular interactions is based on the use of optically resonant devices whose resonant wavelength is shifted due to a local change in refractive index caused by a positive binding event between a surface bound molecule and its solution phase target. These devices have an extremely low limit of detection and are compatible with aqueous environments. The device combines the sensitivity (limit of detection) of nanosensor technology with the parallelity of the microarray type format.

US Patent:

20110294691, Dec 1, 2011

Filed:

Oct 14, 2009

Appl. No.:

13/124296

Inventors:

David Erickson - Ithaca NY, US
Yun Suk Huh - Daejeon, KR
Carl A. Batt - Groton NY, US
Adam Joseph Lowe - Syracuse NY, US

International Classification:

C40B 30/04
C12M 1/34
C07H 1/00
C12Q 1/68
C07H 21/00

US Classification:

506 9, 435 611, 536 2433, 4352872

Abstract:

A method for detecting target nucleic acids such as SNPs is provided. The method comprises performing a ligase detection reaction (LDR), performing surface enhanced Raman scattering (SERS) on the LDR, and analyzing the outcome of the LDR using analysis and/or quantification of the SERS by detecting an emitted Raman signature. The LDR-SERS method can be used for sensitive and specific detection of any nucleic acid sequence of interest. A microfluidic SERS detection device is also provided. The device comprises electrokinetically active microwells for mixing and concentrating analytes and in which analytes can be quantified. The device can be used for performing the LDR-SERS method in optofluidic chip format.