Patents Represented by Attorney Robert J. Feltovic
  • Patent number: 6037287
    Abstract: A wear resistant coating for journals, journal sleeves and bushings on submerged rolls in a molten metal coating bath, comprising a laser-melted tungsten carbide containing overlay.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: March 14, 2000
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Harold Haruhisa Fukubayashi
  • Patent number: 5906896
    Abstract: A gas seal for rotary shaft applications in which at least a portion of a contact surface of one member of the seal that has relative motion with and in contact with a second member of the seal is coated with a chromium carbide-age hardenable nickel base alloy. The process for depositing and heating the coating is also claimed.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: May 25, 1999
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: John Eric Jackson, Marianne O'Connor Price
  • Patent number: 5871139
    Abstract: Coating a structure such as a brazed joint with a powdered wicking agent, preferably mixed with a fugitive liquid binder to form an adherent slurry, then heating the joint to allow the brazing alloy to melt and be drawn into the powdered wicking agent by capillary action. After cooling, the powder and braze alloy are mixed together to form a loosely consolidated mass which can be readily removed by mechanical and/or chemical means so that the components can then be separated for repair or reuse.
    Type: Grant
    Filed: August 1, 1996
    Date of Patent: February 16, 1999
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Craig R. Moyer
  • Patent number: 5869144
    Abstract: A boron-nitride-silicate-containing sealant having good resistance to attack by molten metal such as molten zinc and a method for coating the sealant on a substrate.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: February 9, 1999
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Anthony John Stavros
  • Patent number: 5863618
    Abstract: A method for producing an atomized powder of chromium carbide particles dispersed in a nickel chromium matrix in which chromium in the powder is from 55 to 92 weight percent of the powder.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: January 26, 1999
    Assignee: Praxair St Technology, Inc.
    Inventors: William John Crim Jarosinski, Lewis Benton Temples, Calvin Henry Londry
  • Patent number: 5840386
    Abstract: A sleeve adapted to be mounted on a mandrel to form a liquid transfer roll or the like comprises a radially expandable inner skin defining a radially inner surface of the sleeve, at least one radially compressible intermediate layer of resilient plastic material; and a rigid, self-supporting metal outer tube. Further methods for producing such a sleeve are described.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: November 24, 1998
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Russell Bruce Hatch, Jacques Luthi
  • Patent number: 5837327
    Abstract: A TiB.sub.2 -M coating which consists of greater than 50 vol % TiB.sub.2 hard phase particles in a metal or metal alloy (M) matrix that is produced by a thermal spray process using sintered TiB.sub.2 -M powders. The TiB.sub.2 -M powders were fabricated by sintering TiB.sub.2 powders and elemental metals or metal alloys which were selected to form a desired matrix for the TiB.sub.2 particles.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: November 17, 1998
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Jiinjen Albert Sue, Robert Clark Tucker, Jr., Antony John Stavros
  • Patent number: 5747163
    Abstract: A powder for use in a thermal spraying coating process comprises particles consisting essentially of a metal carbide core coated at least partially with a layer consisting essentially of a nickel-chromium alloy containing the metal carbide dissolved therein. The particles are formed by heating a mixture of fine starting particles of the metal carbide in the presence of the nickel-chromium alloy under conditions effective to cause a portion, preferably 60 to 90 wt. %, of the starting metal carbide to dissolve in the Ni--Cr alloy. In an alternate embodiment suitable for higher temperature application, more than 90 wt. % of the starting carbide particles are dissolved. As the amount dissolved approaches 100 wt. %, the core essentially disappears. Coatings formed according to the invention show an unexpectedly large increase in both smoothness and erosion resistance.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: May 5, 1998
    Inventor: Richard M. Douglas
  • Patent number: 5743013
    Abstract: A compressor or turbine blade having its tip coated with a zirconium-based oxide having a plurality of macrocracks extending at least 100 microns through the coating and the process used to produce such a coating.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: April 28, 1998
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Thomas Alan Taylor, Don Joseph Lemen
  • Patent number: 5741556
    Abstract: A thermal spray process for producing a MCrAlY-based coating wherein M is selected from the group consisting of iron, cobalt, nickel and mixtures thereof and wherein the oxygen in the fuel-oxidant mixture of the thermal spray process converts a substantial portion of the yttrium component to Y.sub.2 O.sub.3, a minor portion of the aluminum component to Al.sub.2 O.sub.3, and the Y.sub.2 O.sub.3 and Al.sub.2 O.sub.3 are present in an amount of less than 15 volume percent of the coating.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: April 21, 1998
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Thomas Alan Taylor, James Kent Knapp
  • Patent number: 5736255
    Abstract: A sealing material having excellent resistance to attack by molten metals, such as molten zinc, comprising aluminum phosphate/silicon dioxide-based material. The invention also relates to a method for coating articles with such sealing material.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: April 7, 1998
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Satoshi Sasaki, Hideo Nitta
  • Patent number: 5700423
    Abstract: A hearth roll with a cermet thermal spray coating on the roll surface which is composed of a heat resistant MCrA1Y (M: Fe, Ni, Co) alloy where the amount of A1 is below 10 at. % and the combined (Al+Cr) amount is between 13-31 at. % and at least one oxide ceramic from the group consisting of MgO, MgAl.sub.2 O.sub.4, and Y.sub.2 O.sub.3.
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: December 23, 1997
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Yang Gao
  • Patent number: 5632603
    Abstract: An apparatus for the transfer or conveyance of a slurry and the simultaneous densification thereof through the intermediary of vacuum pumping. Specifically, disclosed is an apparatus for the vacuum pumping of a slurry, particularly a zinc-containing slurry utilized in the preparation of zinc anodes for alkaline batteries, which facilitates the transfer of the slurry and the concurrent densification thereof in conjunction with the elimination of any gas bubbles which are entrapped in the slurry. Also disclosed is a method of transferring and simultaneously densifying a slurry while eliminating entrapped gas bubbles therefrom through the intermediary of a vacuum pumping process utilizing the disclosed apparatus.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: May 27, 1997
    Assignee: Duracell Inc.
    Inventors: Kenneth R. Taylor, Chih-Chung Wang
  • Patent number: 5632554
    Abstract: A method for the production of slurries which are uniform in density and consistency. In particular, a method for preparing zinc anode slurries employed in producing anodes for alkaline batteries. The method comprises a bag slurry forming process, using a drum mixer, involving mixing dry anode components within a sealed, inplated, gas-tight, liquid impervious, flexible, collapsible bag; and, then adding a wet component to the bag, collapsing said bag, and tumbling-kneading the components to form a blended slurry.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: May 27, 1997
    Assignee: Duracell Inc.
    Inventors: Chih-Chung Wang, Kenneth R. Taylor
  • Patent number: 5627472
    Abstract: A tester for determining the condition of an electrochemical power source, e.g. a battery or main cell, is disclosed. The tester may comprise an electrolytic (coulometric) cell connected in series to a auxiliary cell. The auxiliary cell is a miniature electrochemical power cell. The electrolytic (coulometric) cell may have no electromotive force of its own and may comprise an anode and cathode of the same material, desirably silver, with an electrolyte contacting at least a portion of both the anode and cathode. The tester may be permanently connected in parallel to a main cell being tested and is thin enough to be integratable into a label for the main cell. As the main cell discharges, the electrolytic cell anode clears proportionally to the discharge of one of the electrodes of the main cell to provide a continuous visually discernible indication of the state of charge of the main cell.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: May 6, 1997
    Assignee: Duracell Inc.
    Inventors: David Ofer, Gary M. Searle, Joseph Bernier
  • Patent number: 5622612
    Abstract: A process is recited for plating elongated current collectors with indium. The current collectors have particular utility in alkaline electrochemical cells, particularly zinc/manganese dioxide alkaline cells containing "zero-added" mercury. The process of the invention involves electroplating conductive wire with indium and then drawing the plated wire to a lesser diameter. The drawn plated wire may then be cut to the desired lengths, typically in the shape of a nail, for use as current collectors within the alkaline cell.
    Type: Grant
    Filed: November 16, 1995
    Date of Patent: April 22, 1997
    Assignee: Duracell Inc.
    Inventors: David R. Mihara, Stephen J. Rose, Robert E. Gustar, David V. Adamson, Paul Barton
  • Patent number: 5614333
    Abstract: A label for an electrochemical cell with a condition tester for the cell integrated with the label to form a label/tester composite is disclosed. The label/tester composite has a thermochromic material in thermal contact with an electrically conductive material. A substructure containing a cured conductive material and preferably also a thermochromic material is formed on a releasable web and transferred from the releasable web to the inside surface of the heat shrinkable base film. A partition coating may be applied over the transferred conductive material. Preferably, a sheet of paper or plastic film having a large window opening therein for entrapping air is applied over the partition coating and aligned over the heat generating portion of the conductive material. The label/tester composite is applied to the cell housing with the insulating paper or plastic film with window opening against the cell housing.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: March 25, 1997
    Assignee: Duracell Inc.
    Inventors: John Hughen, Scott Ferguson, Michael Garris
  • Patent number: 5612151
    Abstract: A label for an electrochemical cell with a condition tester for the cell integrated with the label to form a label/tester composite is disclosed. The label/tester composite comprises a thermochromic coating in thermal contact with an electrically conductive coating. The label/tester composite is preferably constructed by applying an adhesive to the inside surface of a heat shrinkable base film forming part of the label. A substructure containing a cured conductive coating and preferably also a thermochromic coating is formed on a releasable web. The substructure is transferred from the releasable web to the inside surface of the heat shrinkable base film and in contact with a portion of the adhesive on the base film. A patterned partition insulating coating is then applied over the transferred conductive coating. The label/tester composite is applied to the cell housing. The integrated tester may be manually activated by depressing one or two regions on the surface of the composite.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: March 18, 1997
    Assignee: Duracell Inc.
    Inventor: John F. Hughen
  • Patent number: 5607789
    Abstract: A light transparent moisture barrier useful for preventing moisture from destroying the effectiveness of a moisture sensitive cell condition tester on an electrochemical cell comprises a plurality of very thin, alternating layers of an inorganic material and an organic material on a flexible, polymeric substrate. The layers are not laminated, but are formed on the substrate by a deposition or coating process and the thickness of any layer is less than 5 microns. The organic material is a hydrophobic polymer and the inorganic material is a metal oxide, nitride, a glass or silicon.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: March 4, 1997
    Assignee: Duracell Inc.
    Inventors: Jack Treger, Bryan C. Lagos, John B. Fenn, H. Frank Gibbard, Guang Wei
  • Patent number: 5607790
    Abstract: A label for an electrochemical cell with a condition tester for the cell integrated with the label to form a label/tester composite is disclosed. The label/tester composite has a thermochromic material in thermal contact with an electrically conductive material. A substructure containing a cured conductive material and preferably also a thermochromic material is formed on a releasable web and transferred from the releasable web to the inside surface of the heat shrinkable base film. A partition coating may be applied over the transferred conductive material. Preferably, a sheet of paper or plastic film having a large window opening therein for entrapping air is applied over the partition coating and aligned over the heat generating portion of the conductive material. The label/tester composite is applied to the cell housing with the insulating paper or plastic film with window opening against the cell housing.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: March 4, 1997
    Assignee: Duracell Inc.
    Inventors: John Hughen, Scott Ferguson, Michael Garris