Patents Examined by Matthew J. Lattig
  • Patent number: 6127757
    Abstract: An electromagnetic levitation device comprises an electromagnet (12) which is supported by a structure (13) and is arranged to attract armature (10) carried by another structure (11). Current to the electromagnet (12) is regulated by a control device (16) to ensure that the electromagnetic force exerted by the electromagnet (12) on the armature (10) is sufficient to cause and maintain levitation of the structures (11, 13) at a desired spacing (A in FIG. 1). A decoupling device (17) is arranged between the armature (10) and the structure (11) to accommodate a shock load (L) which reduces the flux gap (15) to zero and decouples the armature (10) from its support structure (11) by moving the stop (20) away from the structure (11). This significantly increases the extent of shock loading that can be tolerated before damage will be incurred.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: October 3, 2000
    Assignee: Bae Systems Electronics Limited
    Inventor: Malcolm A Swinbanks
  • Patent number: 5974718
    Abstract: A recoil system for the butt stock of a firearm having a recoil suppressor assembly whose front end is mounted in the cavity in the rear end of the butt stock. The piston ram of the recoil suppressor assembly in its static position extends rearwardly into a bore hole cavity of an elongated recoil housing. When the firearm is shot, the elongated body portion of the recoil suppressor assembly and its transversely extending mounting flange portion instantaneously travel rearwardly into the bore hole cavity with the bore hole of the body housing reciprocally traveling over the piston ram. An extension coil spring whose front end is secured to the front end of the body portion and whose rear end is secured to a cam assembly returns the elongated body portion to its static position once the recoil of the firearm has been suppressed.
    Type: Grant
    Filed: May 15, 1998
    Date of Patent: November 2, 1999
    Inventors: James K Bentley, Willard H Crawford
  • Patent number: 5949839
    Abstract: A fuel assembly for a boiling water reactor where the fuel assembly during operation is arranged vertically in the core of the reactor. The fuel assembly comprises a plurality of vertical fuel rods (22) arranged in one or more fuel bundles, wherein at least the majority of the fuel rods comprise a stack of fuel pellets (7) surrounded by a cladding tube (8b) and a plenum tube (23) which is connected to the upper part of the cladding tube (8b), the plenum tube having a cross-section area which is smaller than the cross-section area of the cladding tube.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: September 7, 1999
    Assignee: Asea Brown Boveri AB
    Inventor: Olov Nylund
  • Patent number: 5949838
    Abstract: A method of producing austenite steel for use in the radiation zone of a nuclear reactor. The method comprising the steps of forming the austenite steel with about 17% by weight chromium, about 9 to 11.5% by weight nickel, about 0.04% by weight carbon, and iron impurities whose content of silicon is about 0.1% by weight and whose total content of sulfur and phosphorous is less than 0.03% by weight; and exposing the austenite steel to a temperature treatment at a temperature less than 1150 .degree. C. to produce a fine grain lattice with grain diameter features under approximately 20 .mu.m.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: September 7, 1999
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Dietrich Alter, Peter Dewes, Friedrich Garzarolli, Roland Hahn, J. Lawrence Nelson
  • Patent number: 5920028
    Abstract: A locking mechanism for a self-loading hand-held firearm includes a breech block carrier mounted for sliding movement in the longitudinal direction of the weapon and a breech block head which is rotatable about a longitudinal axis between a locked position and an unlocked position. The breech block head has a transverse control pin which is received in an oblique sliding guide formed in the breech block carrier. The sliding guide has first and second guide edge opposite to each other with different angles of inclination with respect to the longitudinal axis.
    Type: Grant
    Filed: April 24, 1997
    Date of Patent: July 6, 1999
    Assignee: Heckler & Koch, GmbH
    Inventors: Manfred Guhring, Helmut Weldle
  • Patent number: 5920602
    Abstract: The invention concerns an underground storage facility for the initial storage of waste transported in containers (34, 36), in particular radioactive waste such as spent fuel elements. The store has transport galleries (10) giving access to storage galleries (12) for storage of the waste. In order to ensure, among other things, safe storage and ease of introduction and transfer of the waste, the invention proposes that the storage gallery (12) runs underneath the transport gallery (10) and is separated from it by a floor (14), designed for the transport of the waste, with closable openings (18) for the introduction and removal of the waste.
    Type: Grant
    Filed: February 4, 1998
    Date of Patent: July 6, 1999
    Assignee: Nukem GmbH
    Inventors: Werner Botzem, Harry Spilker
  • Patent number: 5917874
    Abstract: A target includes a body having a depression in a front side for holding a sample for irradiation by a particle beam to produce a radioisotope. Cooling fins are disposed on a backside of the body opposite the depression. A foil is joined to the body front side to cover the depression and sample therein. A perforate grid is joined to the body atop the foil for supporting the foil and for transmitting the particle beam therethrough. A coolant is circulated over the fins to cool the body during the particle beam irradiation of the sample in the depression.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: June 29, 1999
    Assignee: Brookhaven Science Associates
    Inventors: David J. Schlyer, Richard A. Ferrieri, Conrad Koehler
  • Patent number: 5915291
    Abstract: The protection device according to the invention comprises a primary and a secondary coil facing each other. Current flow through the primary coil induces magnetic fields which repel each other, so that the two coils are jerked apart and a missile is projected towards an approaching projectile. The projecting device is triggered by a sensing device.By offsetting the magnetic fields of the primary and secondary coil, the angle between the direction of acceleration of the missile and the coil plane may be changed, as required.Preferably, the primary coil comprises several offset coil elements, which can be activated separately, in groups or all together, as desired.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: June 22, 1999
    Assignee: Deutsche-Franzosisches Forschungsinstitut Saint-Louis
    Inventors: Gunther Weihrauch, Erich Wollmann, Klaus Sterzelmeier
  • Patent number: 5901192
    Abstract: Core spray line riser repair apparatus and methods for axially restraining a reactor core spray line riser to a T-box are described. In one embodiment, the repair apparatus includes a sleeve, a threaded draw bolt extending through the axial bore, and a threaded block. The sleeve includes a substantially cylindrical main body having an axial bore extending therethrough and a flange at one end of the main body. The sleeve is configured to be inserted into the T-box until the flange abuts against the T-box. The draw bolt is configured to extend through the sleeve flange, the sleeve bore, and an opening in the core spray line riser. The draw bolt engages the block to draw the block in tight engagement with the core spray line riser.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: May 4, 1999
    Assignee: General Electric Company
    Inventors: Gerald Alan Deaver, Barry Hal Koepke
  • Patent number: 5898750
    Abstract: A nested sleeve grid restraint system and a method for making a nested sleeve grid restraint system are disclosed. The nested sleeve grid restraint system comprises an insert tube installed in and secured to the intermediate spacer grid and concentrically around a fuel assembly instrumentation tube, the insert tube having ends extending from the intermediate spacer grid, respectively, above and below the intermediate spacer grid; two spacer sleeves, each having flared ends; the spacer sleeves each being fitted concentrically around the fuel assembly instrumentation tube, respectively, above and below the intermediate spacer grid; the flared ends of the spacer sleeves fitting over the ends of the insert tube extending above and below the intermediate space grid whereby the insert tube nests in the spacer sleeves.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: April 27, 1999
    Assignee: Framatome Technologies
    Inventors: Richard Lee Ridder, William Eastham Bailey
  • Patent number: 5896433
    Abstract: Metal ions are added to a circuit (20, 30) for the reactor water or feed water of a nuclear plant. This is accomplished by dissolving a soluble metal compound the counter-ion of which is possible to decompose to gaseous products and water in water in a reaction vessel (41) in an equipment arrangement (40). The solution is subsequently conducted to a series of vessels (42) for the decomposition of the counter-ion. The solution is then possibly transformed to a mixture or a slurry which is conducted to a vessel (43) for degassing the gaseous products before the addition to the circuit (20, 30) for the reactor water or feed water.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: April 20, 1999
    Assignee: ABB Atom AB
    Inventor: Tormod Kelen
  • Patent number: 5892805
    Abstract: A reactor water clean-up system is provided with a first filter demineralizer having a filter resin containing an alkali substance and a second filter demineralizer with a filter resin not containing an alkali substance. The reactor water is supplied to the first filter demineralizer during the term from the starting operation of the preoperating test of the nuclear reactor and of each fuel cycle to 2000 EFPH. The alkali substance contained in the filter resin is guided into the nuclear reactor to change the pH of the reactor water in the nuclear reactor to the weak alkali side. The Cr quantity which is taken in the oxide film of the fuel cladding tube surface is reduced. After 2000 EFPH from the starting operation, the supply of the reactor water to the first filter demineralizer is stopped, and then, the reactor water is supplied to the second filter demineralizer.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: April 6, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Kouichi Yamane, Yamato Asakura, Katsumi Ohsumi, Kenichi Ito, Noriyuki Ohnaka, Naohito Uetake, Motohiro Aizawa, Akira Ichimura
  • Patent number: 5887044
    Abstract: A uranium-free fuel for a fast nuclear reactor comprising an alloy of Pu, Zr and Hf, wherein Hf is present in an amount less than about 10% by weight of the alloy. The fuel may be in the form of a Pu alloy surrounded by a Zr--Hf alloy or an alloy of Pu--Zr--Hf or a combination of both.
    Type: Grant
    Filed: September 2, 1997
    Date of Patent: March 23, 1999
    Assignee: The United States of America as respresented by the United States Department of Energy
    Inventors: Douglas C. Crawford, Douglas L. Porter, Steven L. Hayes, Robert N. Hill
  • Patent number: 5872825
    Abstract: When hydrogen is generated within the containment of a nuclear power station, its containment atmosphere must be inerted. An undesired pressure buildup within the containment is prevented during such inerting with the apparatus and the method. It is possible to vent and inert the containment atmosphere simultaneously. A reversible activity holdup device is provided, which makes it possible to vent the containment atmosphere, without radioactive material being released into the surroundings. It is thereby also possible for the containment of a nuclear power station to be inerted even as a preventive measure, so that the safety of the nuclear power station plant is markedly increased.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: February 16, 1999
    Assignee: Siemens Aktiengesellschaft
    Inventor: Bernd Eckardt
  • Patent number: 5867550
    Abstract: In a fuel assembly for a nuclear reactor and a process for the production of a screen plate for a foot of the fuel assembly, a particle trap is disposed in the foot of the fuel assembly in order to protect fuel rods of the fuel assembly from damage by foreign bodies. The particle trap is formed of a one-piece screen plate into which holes in the screen plate are worked by electrochemical material erosion. It is thereby possible to produce holes with geometrical dimensions and shapes which can only be achieved with difficulty in a casting process or by mechanical machining.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: February 2, 1999
    Assignee: Siemens Aktiengesellschaft
    Inventor: Bernd Beuerlein
  • Patent number: 5863495
    Abstract: The invention provides a hydrogen nucleus storage method and a hydrogen nucleus storage unit wherein occlusion of hydrogen nuclei and transition into a storage condition after the occlusion can be performed simply and the utilization efficiency of a material which causes cold nuclear fusion to occur is high. A hydrogen occlusion member coated in advance with an insulation layer capable of preventing penetration of hydrogen nuclei therethrough is inserted, only at a portion thereof which is not coated with the insulation layer, into a reactor vessel so that hydrogen nuclei are occluded into the hydrogen occlusion member, and then the portion of the hydrogen occlusion member is removed from the reactor vessel. Thereafter, also the portion which is not coated with the insulation layer is coated with an insulation layer, and the hydrogen occlusion member is accommodated into and kept in a protective case in accordance with the necessity.
    Type: Grant
    Filed: June 2, 1998
    Date of Patent: January 26, 1999
    Inventor: Toichi Chikuma
  • Patent number: 5861570
    Abstract: The present invention is a low-energy detonator for high-density secondary-explosive materials initiated by a semiconductor bridge igniter that comprises a pair of electrically conductive lands connected by a semiconductor bridge. The semiconductor bridge is in operational or direct contact with the explosive material, whereby current flowing through the semiconductor bridge causes initiation of the explosive material. Header wires connected to the electrically-conductive lands and electrical feed-throughs of the header posts of explosive devices, are substantially coaxial to the direction of current flow through the SCB, i.e., substantially coaxial to the SCB length.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: January 19, 1999
    Assignee: Sandia Corporation
    Inventors: Robert W. Bickes, Jr., Mark C. Grubelich
  • Patent number: 5862193
    Abstract: Methods for the production of radionuclides suitable for use in radiopharmaceuticals for diagnostic and therapeutic applications, and specifically, to the production of .sup.186 Re, .sup.188 Re and other radionuclides such as .sup.195m Pt and .sup.198 Au using an inorganic Szilard-Chalmers reaction. Thin-film and powdered .sup.185 or 187 metal targets, and .sup.185 or 187 Re oxide/metal oxide target compositions with rhenium in a lower, relatively reduced oxidation state are prepared. The thin-film rhenium targets are aged for at least about 24 hours and then irradiated with neutrons in the present of an oxidizing medium sufficient to form a product nuclide in the higher oxidized state of perrhenate, ReO.sub.4.sup.-. Significantly, the rate and/or extent of oxidation of target nuclides which do not react with a neutron is controlled.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: January 19, 1999
    Assignee: The Curators of the University of Missouri
    Inventors: Wei Jia, Gary J. Ehrhardt
  • Patent number: 5848113
    Abstract: An electrochemical corrosion potential sensor includes a sensor tip electrically joined to a conductor, and a ceramic insulator joined to the tip around the conductor. A sleeve is joined to the insulator around the conductor, and is electrically insulated from the tip by the ceramic insulator. The insulator has an exposed surface axially separating the tip and sleeve, and a ceramic coating is bonded thereto for preventing dissolution of the insulator by reactor water. In a preferred embodiment, the ceramic insulator is sapphire, and the ceramic coating is yttria-stabilized-zirconia or magnesia-stabilized-zirconia which may be plasma sprayed over the insulator.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: December 8, 1998
    Assignee: General Electric Company
    Inventors: Young Jin Kim, Peter Louis Andresen, Dennis Michael Gray
  • Patent number: 5838752
    Abstract: At a reactor bottom, varieties of work are performed by a working apparatus, the work includes inspecting, cleaning and recovering radioactive corrosion products and other foreign matters deposited or stuck onto a foot mirror of a reactor pressure vessel in a light-water cooling reactor, and cutting, grinding and welding structural members in relation to the foreign matters. The working apparatus includes a body case having a shape of a vertically long tube, having an opening formed in a peripheral surface thereof. The body case being suspended from above the reactor pressure vessel to be installed over an upper end of a control rod driving mechanism housing which is vacant after withdrawal of a control rod driving mechanism from the housing.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: November 17, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Mitsuaki Shimamura