Abstract: Tensile loading is applied to a notched specimen bar through the base of a fixture grip having a pair of interfitting pieces releasably held assembled in a fixture position in axial abutment with the base and in engagement with the specimen bar by means of a pair of fastener bolts, one of which is loosened so as to act as a hinge accommodating pivotal displacement of the interfitting pieces from the fixture position upon removal of the other fastener bolts.
Type:
Grant
Filed:
April 8, 1999
Date of Patent:
July 31, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: A thrust unit having an engine as an external source of motive power for a marine vessel in distress, is delivered by helicopter air drop to a remote seawater location together with other components of the associated towing system, delivered onto the deck of such marine vessel for operational assembly and connection to the thrust unit in order to initiate emergency towing of the marine vessel while immersed in the seawater adjacent thereto under control of personnel on the marine vessel.
Type:
Grant
Filed:
June 22, 2000
Date of Patent:
July 17, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: Low and high frequency components of ship bending loads are computed from sea trial testing data, respectively based on sea statistical properties and geometry of a model ship hull and cyclic wave impact on such model ship hull. The low and high frequency bending load components are combined through an algorithm controlled program to provide a more accurate prediction of cyclic bending loads experienced during the lifetime of a ship hull.
Type:
Grant
Filed:
March 11, 1999
Date of Patent:
July 17, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: A slurry mixture of alcohol, particles and a binding agent undergoes partial solidification and curve-shaped molding in sequence on flat and curved molding surfaces respectively, to produce a curve-shaped foam product suitable for further fabrication as components of curved structures. The flat molding surface is lined with a release cloth on which the slurry initially undergoes partial solidification and is then molded as flexible core material transferred to the curved molding surface for additional shape molding purposes while alcohol removal is completed by evaporation followed by resin filling infusion to form a composite core as the curve-shaped foam product.
Type:
Grant
Filed:
June 29, 1999
Date of Patent:
June 19, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Inventors:
Dennis D. Zadra, Deborah A. Houghton, Vincent J. Castelli
Abstract: Axial sections of a casing assembly such as that of a rocket are maintained interconnected by latching prongs on which thermally responsive Nitinol rings are positioned. Operational control over the latching prongs is achieved by selection of material properties and dimensions of the Nitinol rings during manufacture thereof.
Type:
Grant
Filed:
April 27, 2000
Date of Patent:
June 5, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: Substrates are patterned with antibodies attached thereto at discrete locations from which absorption resistant coating is removed by selectively controlled mechanical scribing contact to avoid chemical removal so as to decrease fabrication costs and increase fabrication speed.
Type:
Grant
Filed:
May 6, 1999
Date of Patent:
May 22, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: A hydrofoil stabilizer fixed to an underwater hull and provided with a pair of pivotally deflectable control flaps through which surface lift on the stabilizer is controlled, is provided with trailing edge tabs on both of the flaps that are pivotally deflected in the same direction to further offset and thereby improve recovery from surface jam inducing lift force on the stabilizer which adversely affects maneuvering control.
Type:
Grant
Filed:
March 16, 2000
Date of Patent:
May 8, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: A vehicle is towed underwater by an air traveling helicopter through a towing cable to induce powered rotation of impellers on the vehicle during its underwater travel at a preselected seawater depth. An electrical generator driven by such impeller supplies electrical energy conditioned to produce a sternwise extending signature simulating magnetic field which is effective to detonate a sea mine in the underwater vicinity toward which the underwater vehicle is being towed.
Type:
Grant
Filed:
December 16, 1999
Date of Patent:
April 10, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: An improved detector is provided for installation in a roadway surface. The detector finds utility in a highway vehicle detection system for determining vehicle presence, vehicle speed and vehicle length. First and second matched induction coil magnetic sensors are maintained at or near the roadway surface. Each of the sensors has a longitudinal axis aligned normal to the roadway surface. The first and second sensors are separated from one another by a known distance in a direction substantially aligned with a direction of traffic flow. Each of the sensors generate a differential magnetic field signature with respect to time to indicate a passing vehicle's leading and trailing edge magnetic signatures. Vehicle speed is determined by a time-distance relationship using the leading and trailing edge magnetic signatures and the known distance. Vehicle length is determined by a time-speed relationship using the leading and trailing edge magnetic signatures and the determined vehicle speed.
Type:
Grant
Filed:
April 30, 1993
Date of Patent:
March 27, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Inventors:
John F Scarzello, Daniel S. Lenko, Adam C. Feaga
Abstract: Liquid waste generated aboard a maritime vessel is separated into oily and non-oily components for separate treatment to obtain flow streams having different waste contents. Those of the flow streams having waste content reduced by the treatment are discharged overboard while the other flow streams having concentrated waste content are subject to incineration.
Type:
Grant
Filed:
October 7, 1999
Date of Patent:
March 27, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: A dynamic ramp interface system to allow a roll-on/roll-off (RORO) ship to unload and load onto a pier, floating storage facility, or other ship during high sea states. The dynamic ramp interface system includes a motion compensation damping system attached to a first platform, a first ramp also attached to the first platform leading up to the motion compensation damping system, and second ramp that is hingedly connected to a second platform and also leading to the motion compensation damping system. The motion compensation damping system includes a top plate, a bottom plate, a series of interconnected hollow bladders, and a pivot support structure. Through this arrangement, the top plate is allowed to pivot relative to the bottom plate, with the bladder system providing a damping effect. The first ramp is slideably in communication with the top plate by means of a set of articulated fingers. The second ramp is also slideably in communication with the top plate.
Type:
Grant
Filed:
March 30, 2000
Date of Patent:
February 27, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Inventors:
Vincent J. Castelli, Joseph F. Korczynski, Jr., Wayne C. Jones, Ely G. Fishlowitz
Abstract: A propelled cable fairing system for towing objects underwater having a plurality of cable fairings, which are individually propelled by motorized propulsion to avoid the thrust of propellers to overcome normally encountered drag heretofore utilized, which required use of longer and thicker cables resulting in a loss of control over the position of the towed object. In addition, the relative position of the propelled cable fairing system is maintained through a set of serially linked motor controllers that sense the relative position of each propelled cable fairing relative to it adjacent propelled cable fairing. Variation in position of the propelled cable fairing from a target, causes increase in speed of the motor or alters its angle of attack in order to keep the propelled cable fairings in predetermined alignment with the adjacent cable fairing.
Type:
Grant
Filed:
June 22, 2000
Date of Patent:
February 20, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: Equipment to be carried on marine vessels during sea travel, is mounted on the table of a test machine through which shock wave induced motion to be experienced by such equipment during the sea travel is simulated and applied to the equipment carrying table by means of coil springs. Such simulated motion is initiated from a position of the table to which it is displaced and from which it is selectively released through a latch device.
Type:
Grant
Filed:
May 27, 1999
Date of Patent:
February 6, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Abstract: A magnetostrictive wire element made of amorphous ferromagnetic material is tailored for installation within a sensor by treatment which includes annealment by heating while a stress condition is imposed thereon, and applying a DC electric current thereto during said annealment to produce a cylindrical magnetic field relative to the wire element establishing spiral magnetic anistropy during cooldown after said heating.
Type:
Grant
Filed:
January 28, 1999
Date of Patent:
January 23, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Inventors:
Marilyn Wun-Fogle, James B. Restorff, Arthur E. Clark
Abstract: Equipment is removably connected by a load transfer element and a removable fastener bolt to a core sandwich type of bulkhead through a plug-in insert, adhesively bonded to the bulkhead at interface surfaces within a pocket formed in the bulkhead for reception of such insert.
Type:
Grant
Filed:
December 16, 1999
Date of Patent:
January 9, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Inventors:
Aleksander B. Macander, Erik A. Rasmussen, Milton O. Critchfield
Abstract: Targeted portions of material layered structure is probed by microwave radiation focussed onto the targeted portion by adjustment of antenna position and orientation establishing a single oblique incidence path for reflection of antenna emitted probing radiation. Signal measurements of the radiation along the oblique incidence path is obtained to provide for evaluation and detection of defects in the targeted portion of the structure being probed.
Type:
Grant
Filed:
December 30, 1998
Date of Patent:
January 9, 2001
Assignee:
The United Sates of America as represented by the Secretary
of the Navy
Abstract: A flow modifying element is fixedly positioned on a cavity enclosure over a forward portion of an opening therein through which the cavity is exposed to fluid undergoing flow above the opening. Some of such fluid is thereby diverted into the cavity to suppress acoustic oscillations caused by flinduced cavity resonance.
Type:
Grant
Filed:
August 4, 1999
Date of Patent:
December 26, 2000
Assignee:
The United States of America as represented by the Secretary of the Navy
Abstract: A pump-jet type of outboard propulsion unit within a surrounding fluid mem for marine craft or the like, is protectively enclosed within cylindrical shrouding which forms an axial flow passage about the exhaust channel of the propulsion unit through which flow of the fluid medium is induced by rotation of impeller blades. Inflow of the fluid medium to the flow passage is modified at an inlet end of the shrouding by a plurality of angularly spaced vanes attached thereto and extending forwardly therefrom at an angle.
Type:
Grant
Filed:
August 4, 1999
Date of Patent:
December 12, 2000
Assignee:
The United States of America as represented by the Secretary of the Navy
Abstract: Pinion and ring gears intermeshed at one location within a pump chamber are rotationally supported therein by a cylindrical bearing portion of a housing sealingly enclosing said pump chamber between side plates of the housing within which stator windings are mounted in operative alignment with permanent magnets carried in one of the gears acting as a motor rotor as a result of interaction between such magnets and magnetic fields produced by electrical input power fed to the stator windings.
Type:
Grant
Filed:
August 28, 1997
Date of Patent:
June 5, 2001
Assignee:
The United States of America as represented by the Secretary
of the Navy
Inventors:
John W. Henry, IV, William F. Flickinger, Thomas E. Calvert, Robert C. Smith, James S. Slebzak