Patents by Inventor Philippe Leboeuf
Philippe Leboeuf 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: 8505682Abstract: Disclosed is a muffler assembly including: a) polymeric housing having an interior surface and at least one opening for at least one inlet and one outlet exhaust pipe; b) at least one metal inlet exhaust pipe and at least one metal outlet exhaust pipe positioned within the openings to provide housing-exhaust pipe interfaces; c) a thermal insulating material coating the interior surface of the polymeric housing and extending through the housing-exhaust pipe interfaces; wherein the thermal insulating material seals the muffler assembly at the housing-exhaust pipe interfaces; and wherein the muffler assembly has a leak rate of 105 Liters/minute or less at 4.5 psig pressure. An optional muffler assembly has body mounting adapters attached to the inlet and outlet exhaust pipes and positioned within the openings to provide housing-body mounting adapter interfaces. Also disclosed are processes for manufacturing the muffler assemblies.Type: GrantFiled: April 24, 2012Date of Patent: August 13, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Daniel P. Jones, Philippe Leboeuf, Karl Paul Maurer
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Patent number: 8424636Abstract: A muffler assembly including one or more exhaust pipe(s), a polymeric housing carried by at least one of the exhaust pipe(s); a thermal insulating layer lining the housing interior surface and extending between the housing and exhaust pipe at the housing-exhaust pipe interface; wherein the thermal insulating layer includes a nonwoven fabric; wherein when the fabric is exposed to heat, the fabric increases in thickness to seal the muffler assembly at the housing-exhaust pipe interface and provides thermal insulation to the polymeric housing.Type: GrantFiled: April 24, 2012Date of Patent: April 23, 2013Assignee: E.I. du Pont de Nemours and CompanyInventors: Daniel P. Jones, Philippe Leboeuf, Karl Paul Maurer
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Publication number: 20120273300Abstract: Disclosed is a muffler assembly including: a) polymeric housing having an interior surface and at least one opening for at least one inlet and one outlet exhaust pipe; b) at least one metal inlet exhaust pipe and at least one metal outlet exhaust pipe positioned within the openings to provide housing-exhaust pipe interfaces; c) a thermal insulating material coating the interior surface of the polymeric housing and extending through the housing-exhaust pipe interfaces; wherein the thermal insulating material seals the muffler assembly at the housing-exhaust pipe interfaces; and wherein the muffler assembly has a leak rate of 105 Liters/minute or less at 4.5 psig pressure. An optional muffler assembly has body mounting adapters attached to the inlet and outlet exhaust pipes and positioned within the openings to provide housing-body mounting adapter interfaces. Also disclosed are processes for manufacturing the muffler assemblies.Type: ApplicationFiled: April 24, 2012Publication date: November 1, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Daniel P. Jones, Philippe Leboeuf, Karl Paul Maurer
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Publication number: 20120273299Abstract: A muffler assembly including one or more exhaust pipe(s), a polymeric housing carried by at least one of the exhaust pipe(s); a thermal insulating layer lining the housing interior surface and extending between the housing and exhaust pipe at the housing-exhaust pipe interface; wherein the thermal insulating layer includes a nonwoven fabric; wherein when the fabric is exposed to heat, the fabric increases in thickness to seal the muffler assembly at the housing-exhaust pipe interface and provides thermal insulation to the polymeric housing.Type: ApplicationFiled: April 24, 2012Publication date: November 1, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Daniel P. Jones, Philippe Leboeuf, Karl Paul Maurer
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Publication number: 20120273301Abstract: A muffler assembly including one or more exhaust pipe(s), one or more mounting adapter(s) attached to the one or more exhaust pipe(s), a polymeric housing carried by one or more mounting adapter(s), a thermal insulating layer lining the housing interior surface and extending between the housing and one or more mounting adapter(s) at the housing-mounting adapter interface(s); wherein the thermal insulating layer includes a nonwoven fabric; wherein when the fabric is exposed to heat, the fabric increases in thickness to seal the muffler assembly at the housing-exhaust pipe interface and provides thermal insulation to the polymeric housing.Type: ApplicationFiled: April 24, 2012Publication date: November 1, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Daniel P. Jones, Philippe Leboeuf, Karl Paul Maurer
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Patent number: 7989548Abstract: The invention relates to a new polymer blend comprising: 20 to 70 wt % of a mixture (A) of two or more polyalkylene phthalates; 2 to 60 wt % of a cross-linked acrylate rubber; 0.5 to 20 wt % of an ionomer; and 1 to 30 wt % of a terpolymer of ethylene, butylacrylate (BA) and glycidylmethacrylate (GMA); wherein the weight percentages are based on the sum of the above ingredients. The polymer blend of the invention is particularly suitable for blow-moulding, to make parts for high-temperature, high-oil-exposure uses.Type: GrantFiled: July 7, 2009Date of Patent: August 2, 2011Assignee: E.I. du Pont de Nemours and CompanyInventors: Vincent Descombes, Philippe Leboeuf, Jean-Michel Philippoz, Michel C. Renaud, Serge Cavalli
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Publication number: 20110057363Abstract: The present invention relates to the field of copolyester elastomer compositions for manufacturing articles by melt extrusion processes at high extrusion rate, which articles exhibit higher quality smooth surface appearance than the articles made from compositions of the state of the art.Type: ApplicationFiled: May 8, 2009Publication date: March 10, 2011Inventor: Philippe LeBoeuf
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Publication number: 20100273945Abstract: The invention relates to a new polymer blend comprising: 20 to 70 wt % of a mixture (A) of two or more polyalkylene phthalates; 2 to 60 wt % of a cross-linked acrylate rubber; 0.5 to 20 wt % of an ionomer; and 1 to 30 wt % of a terpolymer of ethylene, butylacrylate (BA) and glycidylmethacrylate (GMA); wherein the weight percentages are based on the sum of the above ingredients. The polymer blend of the invention is particularly suitable for blow-moulding, to make parts for high-temperature, high-oil-exposure uses.Type: ApplicationFiled: July 7, 2009Publication date: October 28, 2010Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Serge Cavalli, Vincent Decombes, Philippe Leboeuf, Jean-Michel Philippoz, Michel C. Renaud
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Publication number: 20090194364Abstract: Mufflers having polymeric bodies that are protected from being overheated from the exhaust pipe by having an air gap between the exhaust pipe and the polymeric body are disclosed. Also disclosed is a process for making muffler systems wherein the muffler polymeric bodies have a cross section that is constant over the length of the muffler polymeric body. The muffler systems are inexpensive to make and install.Type: ApplicationFiled: February 2, 2009Publication date: August 6, 2009Inventors: Philippe Leboeuf, Frederic Bonnin, Karl Paul Maurer, Daniel P. Jones
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Publication number: 20060223923Abstract: The invention relates to a new polymer blend comprising: 20 to 70 wt % of a mixture (A) of two or more polyalkylene phthalates; 2 to 60 wt % of a cross-linked acrylate rubber; 0.5 to 20 wt % of an ionomer; and 1 to 30 wt % of a terpolymer of ethylene, butylacrylate (BA) and glycidylmethacrylate (GMA); wherein the weight percentages are based on the sum of the above ingredients. The polymer blend of the invention is particularly suitable for blow-moulding, to make parts for high-temperature, high-oil-exposure uses.Type: ApplicationFiled: February 2, 2006Publication date: October 5, 2006Inventors: Serge Cavalli, Vincent Descombes, Philippe LeBoeuf, Jean-Michel Philippoz, Michael Renaud
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Patent number: 5798063Abstract: A process for making injection molded articles having a substantially smooth outer surface and a foamed core by injecting a molten thermoplastic into a mold, and, when the outer surface has formed, injecting a gas under pressure into the mold whereby a limited amount of molten material flows back into the injection unit to create a hollow space in the core of the melt, and releasing the gas pressure to allow the core to foam.Type: GrantFiled: March 27, 1997Date of Patent: August 25, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Klaus Bender, Philippe Leboeuf, Georgios Topulos