Patents Represented by Attorney, Agent or Law Firm W. Mark Bielawski
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Patent number: 8313825Abstract: A curable resin with at least one electrically conductive metal region on its surface formed by depositing on the surface a composition comprising activator, contacting the activator with a solution of a reducing agent and a solution of a metal ion, the reducing agent and metal ion undergoing chemical reaction activated by the activator to form an electrically conductive metal region on the surface, and method of forming is provided.Type: GrantFiled: September 19, 2007Date of Patent: November 20, 2012Assignees: Hexcel Composites Limited, Conductive Inkjet Technology LimitedInventors: Martin Simmons, John Leslie Cawse, Ian Rees, Xiuyan Sun
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Patent number: 8304080Abstract: A resin composition that is storable at ambient temperatures. The resin composition forms a cured resin when exposed to a curing agent and heated to a curing temperature that is relatively close to ambient temperature. The resin composition includes a crystalline resin component that is sandwiched between two non-crystalline resin components to provide a zone that is rich in crystalline thermosetting resin. The crystalline thermosetting resin has a melting point that is above ambient temperature, but below the curing temperature. The viscosity of the resin component changes from a high viscosity state to a low viscosity state when the temperature is increased from ambient temperature to the curing temperature.Type: GrantFiled: November 23, 2010Date of Patent: November 6, 2012Assignee: Hexcel Composites Ltd.Inventors: Chris Harrington, Philip C. Hadley
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Patent number: 8283408Abstract: Composite materials that contain thermoplastic-toughened cyanate ester resins as the resin matrix. The composite materials exhibit low levels of heat release when burned. The matrix resins are composed of from 50 to 80 weight percent of a cyanate ester resin component. The matrix resin composition also includes from 10 to 40 weight percent of a thermoplastic blend that is composed of polyetherimide and polyamideimide. The epoxy resin composition further includes from 1 to 10 weight percent of a curative agent. The composite materials may be used for primary structures in aircraft and other load-bearing structures.Type: GrantFiled: February 26, 2010Date of Patent: October 9, 2012Assignee: Hexcel CorporationInventors: Yen-Seine Wang, Yi-Jui Wu
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Patent number: 8263503Abstract: A composite material, the composite material comprising at least one prepreg, said prepreg comprising at least one polymeric resin and at least one fibrous reinforcement; and conducting particles dispersed in the polymeric resin.Type: GrantFiled: December 22, 2010Date of Patent: September 11, 2012Assignee: Hexcel Composites, Ltd.Inventors: John L. Cawse, Martin Simmons, George Green
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Patent number: 8263205Abstract: Layers of unidirectional (UD) fiber prepreg are formed into a pre-plied, multi-directional, continuous fiber laminate that is used as a molding compound to form three dimensional structures. Cut-outs from the laminate are slotted and folded along fold lines to provide near-net-shaped preforms that may be compression molded to form fiber-reinforced composite structures having complex shapes.Type: GrantFiled: September 17, 2009Date of Patent: September 11, 2012Assignee: Hexcel CorporationInventor: Matthew Kweder
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Patent number: 8257631Abstract: Machinable composite molds for use in molding composite structures. The mold includes a mold body having a tool surface that is shaped to provide the molded surface of the composite structure. The mold body is made up of at least one mold layer composed of a quasi-isotropic material composed of a plurality of randomly oriented fiber bundles or chips impregnated with a resin. The use of randomly oriented fiber chips allows post-cure machining of the mold body.Type: GrantFiled: May 30, 2011Date of Patent: September 4, 2012Assignee: Hexcel CorporationInventor: Richard A. Callis
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Patent number: 8220821Abstract: An uncured fiber reinforced assembly that includes a reinforcement layer containing a fibrous material and at least one highly reactive curing agent. A matrix film layer is applied to the reinforcement layer so that it does not substantially impregnate the reinforcement layer. The matrix film layer includes at least one uncured epoxy resin and at least one latent epoxy curing agent. The assembly is designed for use in making snowboards and skis.Type: GrantFiled: May 13, 2010Date of Patent: July 17, 2012Assignee: Hexcel Composites, Ltd.Inventors: Killian O'Byrne, Phlip C. Hadley, Chris Harrington
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Patent number: 8212194Abstract: Quasi-isotropic chopped prepreg is used to make parts found in aerospace vehicles. Exemplary aerospace parts that are made using quasi-isotropic chopped prepreg include aircraft window frames, wing fairing supports, flange supports, frame gussets, rudder actuator brackets, shear ties, seat pedestals, cargo floor flange supports, storage bin fittings, antenna supports, torque tube pans, handle boxes, side guide fittings, wing box covers and intercostals.Type: GrantFiled: July 24, 2009Date of Patent: July 3, 2012Assignee: Hexcel CorporationInventors: Bruno S. Boursier, Jack D. Fudge
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Patent number: 8177168Abstract: Quasi-isotropic chopped prepreg is used to make parts found in aerospace vehicles. Exemplary aerospace parts that are made using quasi-isotropic chopped prepreg include aircraft window frames, wing fairing supports, flange supports, frame gussets, rudder actuator brackets, shear ties, seat pedestals, cargo floor flange supports, storage bin fittings, antenna supports, torque tube pans, handle boxes, side guide fittings, wing box covers and intercostals.Type: GrantFiled: November 16, 2011Date of Patent: May 15, 2012Assignee: Hexcel CorporationInventors: Bruno S. Boursier, Jack D. Fudge
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Patent number: 8163219Abstract: Methods and apparatus are provided for making a rotor blade spar from composite material wherein a multi-component mandrel is used to form the composite spar. The mandrel is made using a number of components, which are assembled to provide a structure that is sufficiently strong to maintain the spar shape during pre-cure lay up, compaction and curing of the composite material. The multiple components used to form the mandrel can be separated from each other and easily removed from the spar either before or after curing of the composite material. The mandrel components can then be re-assembled and re-used to form additional composite spars.Type: GrantFiled: May 26, 2010Date of Patent: April 24, 2012Assignee: Hexcel CorporationInventors: Richard A. Callis, Joe White, Jane White, legal representative, Scott Newkirk
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Patent number: 8105964Abstract: A composite material, the composite material comprising at least one prepreg, said prepreg comprising at least one polymeric resin and at least one fibrous reinforcement; and conducting particles dispersed in the polymeric resin.Type: GrantFiled: December 20, 2010Date of Patent: January 31, 2012Assignee: Hexcel Composites, Ltd.Inventors: John L. Cawse, Martin Simmons, George Green
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Patent number: 8101106Abstract: Molding material that includes a layer of fibrous reinforcing material having one surface on which a first layer of a resin partially impregnates the fibrous material and a further resin layer located on the opposite surface which retains in position surface fibers of the fibrous material. The further resin layer is of lower weight than the first layer and is formed as an openwork structure with a solid part and spaces through which the fibrous material is exposed.Type: GrantFiled: July 16, 2007Date of Patent: January 24, 2012Assignee: Hexcel Composites, Ltd.Inventor: John Ellis
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Patent number: 8097333Abstract: Pre-impregnated composite material (prepreg) is provided that can be cured to form composite parts that have high levels of damage tolerance. The matrix resin includes a thermoplastic particle component that is a blend of particles that have a melting point above the curing temperature and particles that have a melting point at or below the curing temperature.Type: GrantFiled: March 7, 2011Date of Patent: January 17, 2012Assignees: Hexcel Corporation, Hexcel Composites, Ltd.Inventors: David Tilbrook, Dana Blair, Maureen Boyle, Paul Mackenzie
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Patent number: 8071207Abstract: A resin composition that is storable at ambient temperatures. The resin composition forms a cured resin when exposed to a curing agent and heated to a curing temperature that is relatively close to ambient temperature. The resin composition includes a resin component that is composed of a liquid part that is made up of one or more liquid thermosetting resins and a solid part that includes particles of one or more solid thermosetting resins. The liquid part further includes a gelation agent that is present in a sufficient amount to maintain the particles in suspension within the liquid part at ambient temperatures. The viscosity of the resin component changes from a high viscosity state to a low viscosity state when the temperature is increased from ambient temperature to the curing temperature. The high viscosity state is substantially more viscous than the low viscosity state.Type: GrantFiled: January 27, 2010Date of Patent: December 6, 2011Assignee: Hexcel Composites LimitedInventors: Chris Harrington, Philip C. Hadley
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Patent number: 8066504Abstract: Methods and apparatus are provided for making a rotor blade spar from composite material wherein a multi-component mandrel is used to form the composite spar. The mandrel is made using a number of components that are assembled and held in place using a roller assembly. The roller assembly is removed after pre-cure lay up and compaction of the composite material. Once the roller assembly is removed, the remaining mandrel components can be separated from each other and easily removed from the spar. The mandrel components, including the roller assembly, can then be re-assembled and re-used to form additional composite spars.Type: GrantFiled: January 25, 2008Date of Patent: November 29, 2011Assignee: Hexcel CorporationInventors: Richard A. Callis, Wayne Johnston, Nate Gray, David P. Bailey
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Patent number: 8066098Abstract: An acoustic structure that includes a honeycomb having cells in which septum caps are located. The septum caps are formed from sheets of acoustic material and include a resonator portion and a flange portion. The flange portion has an anchoring surface that provides frictional engagement of the septum caps to the honeycomb cells when the caps are inserted into the honeycomb during fabrication of the acoustic structure. An adhesive is applied to the anchoring surface of the septum caps after the caps have been inserted into the honeycomb cells to provide a permanent bond.Type: GrantFiled: December 6, 2010Date of Patent: November 29, 2011Assignee: Hexcel CorporationInventor: Earl Ayle
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Patent number: 8039109Abstract: Epoxy resin compositions that generate reduced levels of sulfur dioxide and which unexpectedly have reduced self-extinguishing times. The epoxy resins are composed of from 50 to 70 weight percent of an epoxy resin component. The epoxy resin composition also includes from 15 to 35 weight percent of a thermoplastic blend that is composed of polyetherimide and polyamideimide. The epoxy resin composition further includes from 5 to 25 weight percent of a curative agent.Type: GrantFiled: October 7, 2008Date of Patent: October 18, 2011Assignee: Hexcel CorporationInventors: Yen-Seine Wang, Yi-Jui Wu
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Patent number: 8034278Abstract: Apparatus and methods for molding composite bodies into composite parts using pressure. A lower inflexible mold is combined with an elastic upper mold layer to form a molding cavity in which the composite body to be molded is placed. An elastic pressure layer is used in combination with the upper mold layer to form a pressure chamber. A flexible expansion control layer is used to limit the increase in surface area of the pressure layer during pressurization. A perimeter retention lock is provided to prevent the perimeters of the elastic and flexible layers from moving inward or away from the lower mold during application of pressure to the pressure chamber.Type: GrantFiled: January 13, 2006Date of Patent: October 11, 2011Assignee: Hexcel CorporationInventor: Alfonso Lopez
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Patent number: 8034453Abstract: Epoxy resins and composite materials that generate reduced levels of sulfur dioxide and which unexpectedly have reduced self-extinguishing times. The epoxy resins are composed of from 50 to 70 weight percent of an epoxy resin component. The epoxy resin composition also includes from 20 to 35 weight percent of a thermoplastic blend that is composed of polyetherimide and polyamideimide. The epoxy resin composition further includes from 5 to 25 weight percent of a curative agent. The composite materials may be used for primary structures in aircraft and other load-bearing structures.Type: GrantFiled: September 29, 2009Date of Patent: October 11, 2011Assignee: Hexcel CorporationInventors: Yen-Seine Wang, Yi-Jui Wu
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Patent number: 7988809Abstract: Aircraft floor and interior panels where core-skin bonding is improved between honeycomb and composite face sheets (skins) by applying a polyamide and/or rubber-containing adhesive to the edge of the honeycomb prior to bonding. Edge coating of the honeycomb allows one to reduce panel weight without reducing the performance parameters that are required for different types of aircraft floor and interior panels.Type: GrantFiled: June 20, 2006Date of Patent: August 2, 2011Assignee: Hexcel CorporationInventors: Lance Smith, Yen-Seine Wang, Robert Morrison, Clark Smith