David R Owen

US Patent:

6868212, Mar 15, 2005

Filed:

Mar 6, 2003

Appl. No.:

10/383909

Inventors:

Jeannie DeWitte - Burke VA, US
Yuri Grapov - Park City UT, US
David Owen - West Jordan UT, US
Dennis Elkins - Draper UT, US
Aaron McAllister - Sandy UT, US
Allen Tanner - Sandy UT, US

Assignee:

Evans & Sutherland Computer Corporation - Salt Lake City UT

International Classification:

G02B006/02

US Classification:

385123, 385 13, 385 14, 372 6

Abstract:

A method for adjusting the wavelength and dominant mode of a laser fiber prior to installation in a laser assembly includes the steps of linearly stretching the laser fiber so as to modify its output wavelength, axially twisting the laser fiber so as to modify its dominant mode, and affixing the laser fiber to a laser assembly in its linearly stretched and axially twisted condition. The laser assembly includes a dynamic tuning mechanism for wavelength adjustment during use. The twisted and stretched fiber has an unadjusted wavelength and dominant mode that are within a selected range before adjustment by the dynamic tuning mechanism.

US Patent:

7114764, Oct 3, 2006

Filed:

Apr 22, 2004

Appl. No.:

10/829616

Inventors:

Roshdy George S. Barsoum - McLean VA, US
Rodney O. Peterson - Frederick MD, US
David P. Owen - Columbia MD, US
Wayne C. Jones - Elkridge MD, US
David E. Johnson - Severna Park MD, US

Assignee:

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

International Classification:

B60R 21/00
F41H 7/00

US Classification:

29619307, 29618708, 89 3608, 89 3609

Abstract:

Many military land vehicles are not designed to withstand extreme forces concomitant exploding mines. A vehicle's capacity to protect its occupants is inventively enhanced by structurally augmenting the vehicle, in lower structural portions closely related to the vehicle's cabin, with both elastomeric and rigid (non-elastomeric) materials. An elastomeric layer and a rigid layer (typically embodied as a metal or composite sheet or plate) are added to the vehicle in each of seven locations, viz. , the four wheel wells (left-front, right-front, left-rear, right-rear), the two floorboards (left and right), and the intervening underside area. At each wheel well and floorboard location, the elastomer is sandwiched between the vehicle's existing rigid structure and the rigid member so as to form a tri-layer material system. At the intervening underside location, an elastomer-coated rigid member is attached with the elastomer face-down. The seven material systems are energy-dissipative and impact-deflective both locally and globally.

US Patent:

8105510, Jan 31, 2012

Filed:

Oct 5, 2007

Appl. No.:

11/973999

Inventors:

Curtis A. Martin - Damascus MD, US
David E. Johnson - Glen Burnie MD, US
David P. Owen - Columbia MD, US
Rodney O. Peterson - Frederick MD, US
Philip J. Dudt - North Bethesda MD, US

Assignee:

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

International Classification:

B29C 39/18

US Classification:

264 26, 264275

Abstract:

The present invention's stratified composite system of armor, as typically embodied, comprises a backing stratum and a strike stratum that includes elastomeric matrix material and low-density ceramic elements embedded therein and arranged (e. g. , in one or more rows and one or more columns) along a geometric plane (or plural parallel geometric planes) corresponding to the front surface of the strike stratum. Some inventive embodiments also comprise a spall-containment stratum fronting the strike stratum. The density of the low-density ceramic material is in the approximate range 2. 0-3. 0 g/cm. In the strike stratum, the volume ratio of the low-density ceramic material to the elastomeric matrix material is in the approximate range 4-20. The present invention's emulative method for designing an inventive armor system typically involves configurative change of the inventive armor system's low-density ceramic material vis-à-vis another armor system's high-density ceramic material so that the respective ceramic material areal densities are equal.

US Patent:

8226873, Jul 24, 2012

Filed:

Jan 31, 2012

Appl. No.:

13/362856

Inventors:

Curtis A. Martin - Damascus MD, US
David E. Johnson - Glen Burnie MD, US
David P. Owen - Columbia MD, US
Rodney O. Peterson - Frederick MD, US
Philip J. Dudt - North Bethesda MD, US

Assignee:

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

International Classification:

B29C 39/18
F41H 5/04

US Classification:

264261, 264275, 89 3602, 89906, 89908, 89918, 703 6

Abstract:

The present invention's stratified composite system of armor, as typically embodied, comprises a backing stratum and a strike stratum that includes elastomeric matrix material and low-density ceramic elements embedded therein and arranged (e. g. , in one or more rows and one or more columns) along a geometric plane (or plural parallel geometric planes) corresponding to the front surface of the strike stratum. Some inventive embodiments also comprise a spall-containment stratum fronting the strike stratum. The density of the low-density ceramic material is in the approximate range 2. 0-3. 0 g/cm. In the strike stratum, the volume ratio of the low-density ceramic material to the elastomeric matrix material is in the approximate range 4-20. The present invention's emulative method for designing an inventive armor system typically involves configurative change of the inventive armor system's low-density ceramic material vis-à-vis another armor system's high-density ceramic material so that the respective ceramic material areal densities are equal.