Philip S Dudt

7163138, Jan 16, 2007

May 9, 2005

11/126510

Philip John Dudt - Rockville MD, US
David R. Forrest - Gaithersburg MD, US
Jennifer P. Nguyen - Sterling VA, US

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

B23K 20/12
B23K 31/02

2281121

An axially elongated cylindrical tool has a protrusion at a lower end thereof which is inserted into a metallic work piece substrate under pressure during rotation of the tool and displacement thereof in one direction. Mixing of a matrix of metal and particles by the protrusion occurs within a stir zone underlying the substrate surface which is thereby treated by dispersion of the particles therein in response to rotation of the tool. Influx of the hard particles into the work piece substrate is effected during said mixing by the rotating tool.

7707957, May 4, 2010

Jan 23, 2007

11/700966

Philip John Dudt - Rockville MD, US
Joseph P. Teter - Darnestown MD, US

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

B63G 8/00

114312, 114341

A supporting arrangement for a vessel for counteracting compressive loads at an operating temperature. The supporting arrangement also provides inertial stiffening of the hull of the vessel as well as acoustic and vibration damping. The supporting arrangement includes a support structure that is made from a shape memory alloy that contacts and presses against the inner walls of the vessel. The supporting arrangement utilizes the shape recovery properties and/or the internal energy properties of the shape memory alloy support structure to provide reinforcing and damping forces.

7794808, Sep 14, 2010

May 22, 2006

11/443845

Philip John Dudt - Rockville MD, US
Roshdy George S. Barsoum - McLean VA, US

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

B65D 39/00
B32B 27/04
F41H 5/04
F41H 5/06

428 369, 428 357, 428 368, 428911, 428912, 442134, 442135, 89 3602, 89 3604

A typical inventive embodiment describes a tubular shape and comprises a rigid outer layer, an elastomeric middle layer and a rigid inner layer. The elastomeric material is a strain-rate-sensitive polymer (e. g. , polyurethane or polyurea) having a Young's modulus of approximately 700-1000 psi at 100% strain, and strong strain-rate-sensitivity in approximately the 10/second-10/second range. By the time that the projectile reaches the rigid inner layer, a projectile that impacts the three-layer system (commencing at the rigid outer layer) is structurally and kinetically diminished in its destructiveness by the rigid outer layer together with the elastomeric middle layer. Furthermore, the elastomeric middle layer becomes more rigid during a brief period in which it absorbs energy from the projectile, then again becomes elastic in a manner formative of a membrane covering the rigid inner layer. The elastomeric membrane tempers leakage if rupturing of the rigid inner layer has occurred.

7938053, May 10, 2011

Aug 19, 2008

12/229670

Philip J. Dudt - Rockville MD, US
George A. Shaw - Warren MI, US
Patrick T. Smith - Alexandria VA, US

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

F41H 5/04

89 3602, 89 3608, 428911

A multi-layer armor comprises: an outer composite spaced from an inner composite. The outer composite comprises (a. ) a high strength strike surface layer, (b. ) a high strain rate sensitivity-hardening polymer and (c. ) a second high strength layer. The inner composite comprises spaced silica glass layers, an acrylic glass layer and a spall liner. In one embodiment the armor is transparent and used to shield a vehicle windshield. In a second embodiment the armor is opaque and is attached to vehicle base armor. The armor may also be applied to a ship. The armor uses commercially available components, is relative inexpensive and is effective.

7946149, May 24, 2011

Dec 15, 2004

11/011649

David E. Knight - Vienna VA, US
William H. Lewis - Gaithersburg MD, US
Philip John Dudt - Rockville MD, US
Lemuel M. Bell - Waldorf MD, US

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

G01M 7/00

73 1208, 73 3514

A transducer is fixedly positioned within a supporting frame, covered by a shield in underlying relation to an enclosure within which explosion pulses are generated for testing purposes. The explosion pulses are profiled during emergence thereof through an aperture in the shield onto a specimen of cellular protective material to be tested by positioning thereof on the transducer. The enclosure is filled with a fluid media such as water to establish a water column corresponding for example to an underwater environment within which such explosion pulses would be generated. The energy of the profiled explosion pulses, not absorbed within the specimen, is measured through the transducer and recorded as a function of time for evaluation of the explosion protective capability of the specimen material being tested.

7946211, May 24, 2011

Jun 25, 2008

12/220396

Clinton S. Winchester - Rockville MD, US
Philip J. Dudt - Rockville MD, US
Hampton M. DeJarnette - Silver Spring MD, US

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

F41H 5/00
F41H 11/00

89 3617, 89902

According to typical inventive practice, an armor structure includes n≧1 highly-rate-sensitive elastomeric layers and n+1≧2 metallic layers, alternately configured. Each metallic layer is electrically connected to a power supply that includes, e. g. , battery(ies) and/or supercapacitor(s). Each adjacent pair of metallic layers sandwiches a highly-rate-sensitive elastomeric layer and forms, with the power supply, an uncompleted electrical circuit. A high-velocity projectile that penetratively encroaches upon a highly-rate-sensitive elastomeric layer is subjected to electrical current by virtue of completion of the uncompleted circuit that includes the two sandwiching metallic layers. The circuit is completed by physical (and hence, electrical) contact, bridging the two sandwiching metallic layers, of the projectile and/or its plasma sheath (which at least partially surrounds the projectile's outside surface due to friction between the projectile and the highly-rate-sensitive elastomeric layer). The highly-rate-sensitive elastomeric layer's projectile-hindering mechanical influence temporally lengthens the projectile-hindering electrical influence.

8105510, Jan 31, 2012

Oct 5, 2007

11/973999

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

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

B29C 39/18

264 26, 264275

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.

8114474, Feb 14, 2012

Jun 21, 2011

13/164804

Philip J. Dudt - Rockville MD, US
David R. Forrest - Washington DC, US
Jennifer N. Wolk - Alexandria VA, US
Stephen Szpara - Hagerstown VA, US

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

B05D 1/02
B05D 3/12

427201, 427191, 427192, 427193, 427369

A metallic glass particle layer is applied to aluminum alloy armor and friction stir mixed into the surface in order to embed the material into the armor and to take advantage of its exceptional hardness. An advantage of the invention is that the hard material is an integral part of the armor, included within the body of the armor plate and not merely a surface coating. The advantage of the friction stir process is that it generates relatively low levels of heat and magnetic measurements show that the amorphous phase condition of the metallic glass is not deteriorated. The armor may be tempered to improve properties.