Search Patents
  • Acoustic filter
    Patent number: 4215764
    Abstract: An acoustical insulating material comprises a fiber reinforced lead composite sheet or panel. In a preferred embodiment of the invention the fibers are substantially axially parallel aligned with one another. The frequency absorption and transmission characteristics of the material may be varied by mechanically stressing the material, e.g. as by placing the material under tension in the direction of fiber orientation.
    Type: Grant
    Filed: July 1, 1976
    Date of Patent: August 5, 1980
    Assignee: Fiber Materials, Inc.
    Inventors: Roy D. Marangoni, Horst Gigerenzer, Roger T. Pepper
  • Reinforced carbon composites
    Patent number: 5597611
    Abstract: Layered carbon-carbon composites having improved interlaminar tensile strength are disclosed together with a process for making such composites. A metal catalyst is first deposited on a panel comprising a plurality of layers of carbon fiber cloth. The panel is then exposed to a gaseous hydrocarbon in an inert atmosphere at elevated temperature in order to promote the growth of graphite whiskers between the carbon cloth layers.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: January 28, 1997
    Assignee: Fiber Materials, Inc.
    Inventors: James R. Lennox, Daniel C. Nelson, Roger T. Pepper
  • Reinforced carbon composites
    Patent number: 5773122
    Abstract: Layered carbon-carbon composites having improved interlaminar tensile strength are disclosed together with a process for making such composites. A metal catalyst is first deposited on a panel comprising a plurality of layers of carbon fiber cloth. The panel is then exposed to a gaseous hydrocarbon in an inert atmosphere at elevated temperature in order to promote the growth of graphite whiskers between the carbon cloth layers.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: June 30, 1998
    Assignee: Fiber Materials, Inc.
    Inventors: James R. Lennox, Daniel C. Nelson, Roger T. Pepper
  • Graphite fiber/metal composites
    Patent number: 4072516
    Abstract: A novel graphite fiber/metal composite material in which the graphite fibers have an adherent coating of silicon oxide and silicon carbide. The coating protects the graphite surface from attack by carbide forming matrix metals such as aluminum, titanium, magnesium and nickel. In a preferred embodiment of the invention the coating is formed by an intermediate temperature vapor deposition technique involving the reduction of silicon tetrachloride in the presence of hydrogen and an oxygen containing gas.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: February 7, 1978
    Assignee: Fiber Materials, Inc.
    Inventors: Roger T. Pepper, Thomas A. Zack
  • System for assembling and disassembling a mast
    Patent number: 4942537
    Abstract: An apparatus for assembling or disassembling a mast comprising a plurality elongate mast sections adapted to be attached together in end-to-end configuration. The apparatus includes a lifting assembly for raising or lowering the mast from its bottom end, and a plurality of winches for reeling in or feeding out guy lines attached to the mast. The apparatus also includes a computer for controlling the operation of the winches so as to ensure the length of guy line fed out of the winches is such that the mast is supported in a substantially vertical position.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: July 17, 1990
    Assignee: Fiber Materials, Inc.
    Inventor: Edward H. Verry
  • Multifilament composites
    Patent number: 3949126
    Abstract: A composite structure having isotropic strength properties and comprising a three-dimensional network of reinforcing yarns embedded in a body. The yarns are arranged in a plurality of groups, each group comprising a plurality of yarns arranged parallel with one another. The yarns of at least three of the groups are arranged so that the yarns of each of the three are directed in a mutually orthogonal direction with respect to the other two. At least one other group (or groups of yarns) is directed diagonally to the yarns of at least two of the three mutually orthogonal groups.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: April 6, 1976
    Assignee: Fiber Materials, Inc.
    Inventor: James A. Crawford, Jr.
  • Fire retardant polymer resin
    Patent number: 4309527
    Abstract: Flame retardant polymer resins formed by an acid condensation reaction from a mixture of resorcinol and furfural with a molar excess of the aldehyde. In one particular embodiment the resin is formed of a mixture of two prepolymer solutions with at least a boric acid catalyst, one or both of the prepolymer solutions being an acid-condensation reaction product of resorcinol and furfural with excess aldehyde functionality, or one of the prepolymers being a mix of substantially unreacted resorcinol and furfural with a slight molar excess of aldehyde.
    Type: Grant
    Filed: February 9, 1981
    Date of Patent: January 5, 1982
    Assignee: Fiber Materials, Inc.
    Inventors: Lawrence E. McAllister, Herbert Dietrich
  • Ablative coating composition and product
    Patent number: 4595714
    Abstract: A coating composition for application to a substrate for curing thereon to form an ablative coating. The composition comprises a reactive mixture of epoxy and polysulfide resins, an amine curing agent, refractory fibers and inorganic materials serving as a source of one or more Lewis acids and being capable of forming a glassy reaction product when exposed to heat. When applied to a substrate, the solvent-free composition cures to a tightly adhering, flexible coating capable of providing thermal protection in a very high-temperature, erosive environment.
    Type: Grant
    Filed: March 13, 1981
    Date of Patent: June 17, 1986
    Assignee: Fiber Materials, Inc.
    Inventors: Lawrence E. McAllister, Herbert Dietrich, John E. Hill, Jr.
  • Method of forming carbon composites
    Patent number: 4193828
    Abstract: The ablative response at predetermined locations in a carbon-carbon reinforced composite material are selectively modified by one or more implants of a compatible, non-carbon material disposed at selected sites in the material. The implants of non-carbon material, which should have a melting point below the sublimation temperature of the surrounding carbon matrix and thermal expansibility having a force below the strength of the surrounding carbon matrix, preferably are arranged essentially parallel to one another at selected axial sites in the direction of expected thermal flux.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: March 18, 1980
    Assignee: Fiber Materials, Inc.
    Inventors: Peter R. Moores, James E. Shoffner
  • Selectively modified carbon-carbon composites
    Patent number: 4131708
    Abstract: The ablative response at predetermined locations in a carbon-carbon reinforced composite material are selectively modified by one or more implants of a compatible, non-carbon material disposed at selected sites in the material. The implants of non-carbon material, which should have a melting point below the sublimation temperature of the surrounding carbon matrix and thermal expansibility having a force below the strength of the surrounding carbon matrix, preferably are arranged essentially parallel to one another at selected axial sites in the direction of expected thermal flux.
    Type: Grant
    Filed: July 27, 1976
    Date of Patent: December 26, 1978
    Assignee: Fiber Materials, Inc.
    Inventors: Peter R. Moores, James E. Shoffner
  • Method of making a fire retardant polymer resin
    Patent number: 4275170
    Abstract: Flame retardant polymer resins formed by an acid condensation reaction from a mixture of resorcinol and furfural with a molar excess of the aldehyde. In one particular embodiment the resin is formed of a mixture of two prepolymer solutions with at least a boric acid catalyst, one or both of the prepolymer solutions being an acid-condensation reaction product of resorcinol and furfural with excess aldehyde functionality, or one of the prepolymers being a mix of substantially unreacted resorcinol and furfural with a slight molar excess of aldehyde.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: June 23, 1981
    Assignee: Fiber Materials, Inc.
    Inventors: Lawrence E. McAllister, Herbert Dietrich
  • Fire retardant polymer resin
    Patent number: 4820576
    Abstract: A flame-retardant polymer is created by forming a first resin typically by reacting resorcinol with furfural in a ratio of one mole of the former to less than a mole of the latter in the presence of an alkaline catalyst. A resole is then formed by reacting typically phenol with formaldehyde in a ratio of one mole of phenol to more than a mole of the aldehyde in the presence of an alkaline catalyst. The first resin and resole are mixed together with a powered oxyborate compound such as zinc borate and allowed to polymerize to form the polymer.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: April 11, 1989
    Assignee: Fiber Materials, Inc.
    Inventor: Harold E. Duryea
  • Ablative composition
    Patent number: 4656095
    Abstract: In a coating composition for application to a substrate for curing thereon to form an ablative coating of the type including a reactive mixture of epoxy and polysulfide resins, an amine curing agent, and inorganic materials serving as a source of one or more Lewis acids and being capable of forming a glassy reaction product when exposed to heat, the improvement comprising adding carbonaceous pre-ox fibers thereto in a weight amount between about 15 to 40%. When applied to a substrate, the solvent-free composition cures to a tightly adhering, flexible coating capable of providing thermal protection in a very high temperature, erosive environment.
    Type: Grant
    Filed: May 31, 1984
    Date of Patent: April 7, 1987
    Assignee: Fiber Materials, Inc.
    Inventors: Lawrence E. McAllister, John E. Hill, Jr.
  • Reinforced metal matrix composite
    Patent number: 4145471
    Abstract: A carbon fiber reinforced metal matrix composite is produced by depositing a metal boride coating on the surface of the fibers and subsequently immersing the fibers in a molten bath of the metal matrix material. The boride coating is formed by passing carbon fiber through a gaseous mixture of chlorides of the metal and boron in the presence of zinc vapor at elevated temperatures. The subsequent reaction deposits out a submicron lamina of metal boride on the carbon fibers serving to enhance wetting of the fibers by the molten metal, with the lamina preventing chemical reaction between the fibers and metal matrix materials and also providing a strong mechanical bond therebetween.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: March 20, 1979
    Assignee: Fiber Materials, Inc.
    Inventors: Ernest G. Kendall, Roger T. Pepper
  • Graphite fiber mold
    Patent number: 4581263
    Abstract: A single piece carbon fiber composite article suitable for use as a hot-press mold is has an inner volume of chopped fiber and an outer volume of continuous carbon fiber all in a common graphite support matrix. The article is assembled by winding continuous carbon fiber around a mandrel formed of chopped carbon fiber in a matrix of carbon, impregnating the interstice in the winding and mandrel with graphite precursor material. The precursor material is converted to graphite, creating a common matrix between the internal mandrel and the external windings. The internal volume is machinable to form a graphite mold cavity, and has essentially the same coefficient of thermal expansion as the external volume.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: April 8, 1986
    Assignee: Fiber Materials, Inc.
    Inventor: Kenneth Lukas
  • Reinforced metal matrix composite
    Patent number: 4082864
    Abstract: A carbon fiber reinforced metal matrix composite is produced by depositing a metal boride coating on the surface of the fibers and subsequently immersing the fibers in a molten bath of the metal matrix material. The boride coating is formed by passing carbon fiber through a gaseous mixture of chlorides of the metal and boron in the presence of zinc vapor at elevated temperatures. The subsequent reaction deposits out a submicron lamina of metal boride on the carbon fibers serving to enhance wetting of the fibers by the molten metal, with the lamina preventing chemical reaction between the fibers and metal matrix materials and also providing a strong mechanical bond therebetween.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: April 4, 1978
    Assignee: Fiber Materials, Inc.
    Inventors: Ernest G. Kendall, Roger T. Pepper
  • Fire retardant polymer resin
    Patent number: 4409361
    Abstract: A novel polymer is provided as the condensation reaction product of a non-aqueous mixture of a phenol and an aldehyde in a molar ratio of about 0.5 to 1 phenol to aldehyde, containing refractory fibers, such as carbon, graphite, silica, having an aspect and metal oxides and silicates, which fibers have an aspect ratio of about 10. The phenol is selected from metacresol, orthocresol, 3,5-dimethylphenol, resorcinol and substituted resorcinols, the preferred material being mostly resorcinol. The aldehyde is selected from furfural and mixtures of furfural and paraformaldehyde. The condensation polymerization reaction can be effected by adding an acid catalyst to the mixture or by employing a curing agent which provided a polyfunctional amine reactive with either or both the aldehyde and the phenol.
    Type: Grant
    Filed: November 4, 1981
    Date of Patent: October 11, 1983
    Assignee: Fiber Materials, Inc.
    Inventors: Lawrence E. McAllister, Herbert Dietrich
  • Fire retardant polymer resin
    Patent number: 4471089
    Abstract: A novel polymer is provided as the condensation reaction product of a non-aqueous mixture of a phenol and an aldehyde in a molar ratio of about 0.5 to 1 phenol to aldehyde, containing refractory fibers, such as carbon, graphite, silica, having an aspect and metal oxides and silicates, which fibers have an aspect ratio of about 10. The phenol is selected from metacresol, orthocresol, 3,5-dimethylphenol, resorcinol and substituted resorcinols, the preferred material being mostly resorcinol. The aldehyde is selected from furfural and mixtures of furfural and paraformaldehyde. The condensation polymerization reaction can be effected by adding an acid catalyst to the mixture or by employing a curing agent which provided a polyfunctional amine reactive with either or both the aldehyde and the phenol.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: September 11, 1984
    Assignee: Fiber Materials, Inc.
    Inventors: Lawrence E. McAllister, Herbert Dietrich
  • Hollow composite body having an axis of symmetry
    Patent number: 4847063
    Abstract: Method of forming a hollow, carbon/carbon composite article around an axis of symmetry, in which method a heat refractory mandrel is shaped to provide a desired inner surface configuration and tolerances of the article, and one or more plies of thermally stable carbon filaments are braided over the surface of the mandrel. The filaments have a diameter of substantially not greater than about 6 microns and a modulus of elasticity of substantially not less than about 45.times.10.sup.6 psi. The plies are then impregnated with a carbonizable liquid impregnant, and the assembly of impregnated plies and mandrel is heat treated so as to carbonize the impregnant. The resulting composite article has a high translation of the original strength of the filaments and has an inner surface defined by the outer surface of the mandrel.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: July 11, 1989
    Assignee: Fiber Materials, Inc.
    Inventor: Jack B. Smith
  • Monocrystalline ceramic fibers and method of preparing same
    Patent number: 5200370
    Abstract: Monocrystalline ceramic fibers are disclosed together with a process for preparing such fibers. Polycrystalline ceramic fibers in a tow are coated with a coating that is chemically substantially non-reactive with the ceramic (e.g. alumina fibers coated with molybdenum), and the coated fibers are drawn through a heating zone maintained at a temperature high enough to melt the fibers without melting the coating. The coated fibers are withdrawn from the heating zone and cooled rapidly enough to form a substantially monocrystalline ceramic. The protective coating may thereafter be removed to leave a tow of substantially single-crystal ceramic fibers. Monocrystalline ceramic fibers about 8-20 microns in diameter are prepared by the disclosed process.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: April 6, 1993
    Assignee: Fiber Materials, Inc.
    Inventors: James R. Lennox, Roger T. Pepper, Paul V. Chayka
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