Patents by Inventor David E. Pierick
David E. Pierick has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10414481Abstract: During a method for forming a structural panel, a core structure is formed that includes a plurality of corrugated ribbons and a plurality of walls. Each of the corrugated ribbons is laterally between a respective adjacent pair of the walls. Each of the corrugated ribbons includes a plurality of baffles and a plurality of porous septums. Each of the porous septums is longitudinally between a respective adjacent pair of the baffles. The forming of the core structure includes bonding a first of the walls to a first of the corrugated ribbons and subsequently bonding a second of the walls to the first of the corrugated ribbons. The core structure is bonded to a first skin. The core structure is bonded to a second skin. The core structure is vertically between the first skin and the second skin, and the first skin is configured with a plurality of perforations.Type: GrantFiled: February 14, 2017Date of Patent: September 17, 2019Assignee: Rohr, Inc.Inventors: David E. Pierick, Raymond R. Listak, Andrew S. Gurney
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Publication number: 20180229829Abstract: During a method for forming a structural panel, a core structure is formed that includes a plurality of corrugated ribbons and a plurality of walls. Each of the corrugated ribbons is laterally between a respective adjacent pair of the walls. Each of the corrugated ribbons includes a plurality of baffles and a plurality of porous septums. Each of the porous septums is longitudinally between a respective adjacent pair of the baffles. The forming of the core structure includes bonding a first of the walls to a first of the corrugated ribbons and subsequently bonding a second of the walls to the first of the corrugated ribbons. The core structure is bonded to a first skin. The core structure is bonded to a second skin. The core structure is vertically between the first skin and the second skin, and the first skin is configured with a plurality of perforations.Type: ApplicationFiled: February 14, 2017Publication date: August 16, 2018Inventors: David E. Pierick, Raymond R. Listak, Andrew S. Gurney
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Publication number: 20160265441Abstract: An exhaust system for a gas turbine engine may comprise a titanium alloy substrate. The titanium alloy may comprise IMI 834, titanium 1100, titanium 6242, or Beta-21S. An amorphous silicon oxygen barrier layer may be coupled to the titanium alloy substrate. The amorphous silicon oxygen barrier layer may be deposited by chemical vapor deposition. The exhaust system may have a high creep resistance and be protected from oxidation.Type: ApplicationFiled: November 26, 2014Publication date: September 15, 2016Applicant: ROHR, INC.Inventors: DAVID E. PIERICK, RICHARD S. ALLOWAY
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Patent number: 8137600Abstract: Injection molding systems and methods useful for making microcellular foamed materials are provided as well as microcellular articles. Pressure drop rate and shear rate are important features in some embodiments, and the invention provides systems for controlling these parameters in an injection molding system. Another aspect involves an injection molding system including a nucleator that is upstream of a pressurized mold. Another aspect involves an extrusion system with the reciprocating screw for forming a single phase solution of non-nucleated blowing agent and polymeric material. Another aspect involves very thin walled microcellular material and very thin walled polymeric material. Another aspect provides a method for producing high weight reductions in very thin-walled parts with surfaces that have no noticeable differences from non-foamed parts.Type: GrantFiled: August 20, 2007Date of Patent: March 20, 2012Assignee: Trexel, Inc.Inventors: David E. Pierick, Jere R. Anderson, Sung Woon Cha, Liqin Chen, James F. Stevenson, Dana E. Laing
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Publication number: 20080187741Abstract: The invention provides in-mold decorated articles and methods to form the articles. The in-mold decorated articles include a polymeric portion having a substrate material adhered to a surface of the polymeric portion. The substrate material may be, for example, a film or a fabric. In some embodiments, the polymeric portion may be a foam and, particularly, a microcellular polymeric material. The articles are formed by injecting a mixture of blowing agent and polymeric material into a mold cavity in which the substrate material is disposed, so that the substrate material is forced against a wall of the mold cavity. The blowing agent, which in certain preferred cases is a supercritical fluid, decreases the viscosity of the polymeric material and, therefore, enables reductions in injection pressures and temperatures.Type: ApplicationFiled: April 11, 2008Publication date: August 7, 2008Applicant: Trexel, Inc.Inventors: Joseph P. Vadala, Levi A. Kishbaugh, Kevin J. Levesque, David E. Pierick
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Patent number: 7364677Abstract: The invention provides in-mold decorated articles and methods to form the articles. The in-mold decorated articles include a polymeric portion having a substrate material adhered to a surface of the polymeric portion. The substrate material may be, for example, a film or a fabric. In some embodiments, the polymeric portion may be a foam and, particularly, a microcellular polymeric material. The articles are formed by injecting a mixture of blowing agent and polymeric material into a mold cavity in which the substrate material is disposed, so that the substrate material is forced against a wall of the mold cavity. The blowing agent, which in certain preferred cases is a supercritical fluid, decreases the viscosity of the polymeric material and, therefore, enables reductions in injection pressures and temperatures.Type: GrantFiled: May 18, 2004Date of Patent: April 29, 2008Assignee: Trexel, Inc.Inventors: Joseph P. Vadala, Jr., Levi A. Kishbaugh, Kevin J. Levesque, David E. Pierick
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Patent number: 7361294Abstract: Injection molding systems and methods useful for making microcellular foamed materials are provided as well as microcellular articles. Pressure drop rate and shear rate are important features in some embodiments, and the invention provides systems for controlling these parameters in an injection molding system. Another aspect involves an injection molding system including a nucleator that is upstream of a pressurized mold. Another aspect involves an extrusion system with the reciprocating screw for forming a single phase solution of non-nucleated blowing agent and polymeric material. Another aspect involves very thin walled microcellular material and very thin walled polymeric material. Another aspect provides a method for producing high weight reductions in very thin-walled parts with surfaces that have no noticeable differences from non-foamed parts.Type: GrantFiled: February 2, 2005Date of Patent: April 22, 2008Assignee: Trexel, Inc.Inventors: David E. Pierick, Jere R. Anderson, Sung Woon Cha, Liqin Chen, James F. Stevenson, Dana E. Laing
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Patent number: 6884823Abstract: Injection molding systems and methods useful for making microcellular foamed materials are provided as well as microcellular articles. Pressure drop rate and shear rate are important features in some embodiments, and the invention provides systems for controlling these parameters in an injection molding system. Another aspect involves an injection molding system including a nucleator that is upstream of a pressurized mold. Another aspect involves an extrusion system with the reciprocating screw for forming a single phase solution of non-nucleated blowing agent and polymeric material. Another aspect involves very thin walled microcellular material and very thin walled polymeric material. Another aspect provides a method for producing high weight reductions in very thin-walled parts with surfaces that have no noticeable differences from non-foamed parts.Type: GrantFiled: June 18, 1999Date of Patent: April 26, 2005Assignee: Trexel, Inc.Inventors: David E. Pierick, Jere R. Anderson, Sung W. Cha, Liqin Chen, James F. Stevenson, Dana E. Laing
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Publication number: 20040262813Abstract: Systems and methods for injection molding polymeric materials are provided. The systems and methods use a supercritical fluid additive. In some cases, the use of supercritical fluid additive enables formation of molded articles with low clamping forces and/or low injection pressures. Low clamping forces and/or low injection pressures may reduce the cost of a system designed to form a particular molded article. In some embodiments, the systems may include a control system that controls the operation of one or more components of the system (e.g., the extruder or the supercritical fluid additive introduction system). The systems and methods are suitable for forming polymeric foam articles including microcellular material articles.Type: ApplicationFiled: November 4, 2003Publication date: December 30, 2004Applicant: Trexel, IncorporatedInventors: David E. Pierick, Levi A. Kishbaugh, Jingyi Xu, Juan C. Cardona, Himanshu R. Sheth, Kevin J. Levesque, Jeffrey L. Ng, Roland Y. Kim
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Publication number: 20040212118Abstract: The invention provides in-mold decorated articles and methods to form the articles. The in-mold decorated articles include a polymeric portion having a substrate material adhered to a surface of the polymeric portion. The substrate material may be, for example, a film or a fabric. In some embodiments, the polymeric portion may be a foam and, particularly, a microcellular polymeric material. The articles are formed by injecting a mixture of blowing agent and polymeric material into a mold cavity in which the substrate material is disposed, so that the substrate material is forced against a wall of the mold cavity. The blowing agent, which in certain preferred cases is a supercritical fluid, decreases the viscosity of the polymeric material and, therefore, enables reductions in injection pressures and temperatures.Type: ApplicationFiled: May 18, 2004Publication date: October 28, 2004Inventors: Joseph P. Vadala, Levi A. Kishbaugh, Kevin J. Levesque, David E. Pierick
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Publication number: 20040185241Abstract: A microcellular injection blow molding system and method, and microcellular blow molded articles produced thereby, are described. The system is equipped to extrude microcellular material that changes in thickness, material density, or both in the machine direction while maintaining a constant pressure drop rate during nucleation just prior to extrusion, providing the ability to produce consistent uniform microcellular material independent of material thickness. The systems and methods are particularly useful in production of strong, thin-walled, non-liquid-permeable, opaque containers that do not contain reinforcing agent, chromophore, or residue of chemical blowing agent or chemical blowing agent by-product.Type: ApplicationFiled: January 29, 2004Publication date: September 23, 2004Applicant: Trexel, Inc.Inventors: Jere R. Anderson, Richard S. Straff, Kelvin T. Okamoto, Kent Blizard, David E. Pierick
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Patent number: 6706223Abstract: A microcellular injection blow molding system and method, and microcellular blow molded articles produced thereby, are described. The system is equipped to extrude microcellular material that changes in thickness, material density, or both in the machine direction while maintaining a constant pressure drop rate during nucleation just prior to extrusion, providing the ability to produce consistent uniform microcellular material independent of material thickness. The systems and methods are particularly useful in production of strong, thin-walled, non-liquid-permeable, opaque containers that do not contain reinforcing agent, chromophore, or residue of chemical blowing agent or chemical blowing agent by-product.Type: GrantFiled: October 12, 2000Date of Patent: March 16, 2004Assignee: Trexel, Inc.Inventors: Jere R. Anderson, Richard S. Straff, Kelvin T. Okamoto, Kent Blizard, David E. Pierick
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Patent number: 5929147Abstract: An embrittlement-resistant polyolefin composition, including: (a) at least 80% by weight, based on the total weight of the polyolefin composition, of a crystalline polymer comprising either a propylene homopolymer having an isotactic index greater than 90 or a random copolymer of propylene and either ethylene or C.sub.4 -C.sub.10 1-olefins, (b) an elastomeric copolymer of ethylene and either propylene or butene-1, where the elastomeric copolymer is present in an amount sufficient to enhance the flexibility of the polyolefin composition, without adversely affecting the clarity of the polyolefin composition, and where the polyolefin composition has a heat distortion temperature of at least 60.degree. C. Optional components include a stabilizing amount of a hindered amine light stabilizer, an acid neutralizing agent, and a sorbitol-based compound. The composition may be used to manufacture medical articles and food packaging material which must be sterilized, either by irradiation or by autoclaving.Type: GrantFiled: June 18, 1996Date of Patent: July 27, 1999Assignee: Montell North America Inc.Inventors: David E. Pierick, Thomas J. O'Neal