Patents by Inventor Patrick Reghezza
Patrick Reghezza 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: 8535011Abstract: Shim for a turbomachine blade, for covering the root of said blade, the shim comprising: two branches for covering the bearing surfaces of the blade root; a base interconnecting these branches; and at least one holder element located at one end of the shim and suitable for coming into contact with the blade root to retain the shim relative to the blade root, the shim further comprising, at its other end, at least one foolproofing element projecting from the base in the opposite direction to the branches. A turbomachine rotor assembly including such a shim.Type: GrantFiled: September 24, 2008Date of Patent: September 17, 2013Assignee: SNECMAInventors: Jérôme Mace, Thierry Nitre, Patrick Reghezza
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Publication number: 20090081046Abstract: Shim for a turbomachine blade, for covering the root of said blade, the shim comprising: two branches for covering the bearing surfaces of the blade root; a base interconnecting these branches; and at least one holder element located at one end of the shim and suitable for coming into contact with the blade root to retain the shim relative to the blade root, the shim further comprising, at its other end, at least one foolproofing element projecting from the base in the opposite direction to the branches. A turbomachine rotor assembly including such a shim.Type: ApplicationFiled: September 24, 2008Publication date: March 26, 2009Applicant: SNECMAInventors: Jerome MACE, Thierry Nitre, Patrick Reghezza
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Publication number: 20070020089Abstract: A device for damping vibration of a retention ring for axially retaining turbomachine fan blades, the blades being designed to be mounted via their roots on a rotary disk having an annular flange extending axially and provided with a plurality of radial crenellations for coming into contact with a plurality of complementary radial crenellations of a retention ring designed to be mounted around the disk flange, the device comprising an abutment element of elastomer material designed to be received axially between two adjacent crenellations of the flange and two adjacent complementary crenellations of the retention ring, and radially between the flange of the rotary disk and the retention ring, said abutment element presenting contact surfaces for coming into contact with the adjacent crenellations, with the retention ring, and with the flange of the rotary disk.Type: ApplicationFiled: July 17, 2006Publication date: January 25, 2007Applicant: SNECMAInventors: Jean-Bernard Forgue, Jack-Pierre Lauvergnat, Henry Louis Loiseau, Didier Monnet, Thierry Nitre, Patrick Reghezza
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Patent number: 7108484Abstract: A restraining device for a fan blade root, in which a packing member is constituted by a metal structure having hollowed out portions filed in by overmolding with a semi-rigid elastomer material, in particular on a lateral edge concave side between an upstream end zone and a downstream end zone, which end zones are entirely of metal structure, on a lateral edge convex side between the end zones and a central zone that is essentially of metal structure, and on two top portions of the packing member that extend between the elastomer lateral edges on either side of the metal central zone. The metal structure also includes a bottom recess extending over its entire surface between the upstream end zone and the downstream end zone. Hence, the metal structure behaves like a spring blade when the blade turns following a violent impact.Type: GrantFiled: June 25, 2003Date of Patent: September 19, 2006Assignee: Snecma MoteursInventors: Anne Thenaisie, Alain Bassot, Eric Inghels, Hervé Buisson, Christophe Follonnier, Patrick Reghezza, Bruce Pontoizeau
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Patent number: 7080974Abstract: The invention relates to a bladed disk for a turbomachine, the disk including blades which extend into a conical stream and which are held in a peripheral groove of said disk by hammerhead type fasteners, each of said blades further including a platform whose radially-outer face defines the boundary of the gas flow stream and whose radially-inner face presents an upstream rib and a downstream rib disposed in planes that are perpendicular to the axis of rotation of said disk and that are radially adjacent respectively to an upstream ring and a downstream ring formed at the periphery of said disk on either side of said groove in order to provide leaktightness in these zones, wherein the thickness of the downstream rib in the axial direction is greater than the thickness of the upstream ring.Type: GrantFiled: June 15, 2004Date of Patent: July 25, 2006Assignee: SNECMA MoteursInventors: Claude Lejars, Patrick Reghezza, Jerome Mace, Christophe Follonier, Bruce Pontoizeau
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Patent number: 7029237Abstract: The invention relates to a method of improving the retention capacity of a blade having an asymmetrical hammerhead connection and extending in a conical stream, with the root of the blade being retained in a peripheral groove in a disk, said groove having an upstream lip and a downstream lip presenting respective bearing surfaces that extend in planes that are asymmetrical relative to planes perpendicular to the axis of rotation of said disk, and against which the surfaces of the upstream and downstream flanks of said root come to bear, the bearing surface of said upstream lip being connected to the bottom wall of said groove via a rounded surface, and the upstream flank presenting, in the vicinity of said rounded surface, a heel situated inside a circle of radius R centered on the axis about which said blade tends to pivot when axial stress is applied thereto, said circle outlining, in the upstream lip, a crescent shape of thickness e, wherein: a) the connection between the bearing surface of the upstreamType: GrantFiled: June 30, 2004Date of Patent: April 18, 2006Assignee: Snecma MoteursInventors: Christophe Follonier, Claude Lejars, Jérôme Mace, Bruce Pontoizeau, Patrick Reghezza
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Publication number: 20050254951Abstract: A restraining device for a fan blade root, in which a packing member is constituted by a metal structure having hollowed out portions filed in by overmolding with a semi-rigid elastomer material, in particular on a lateral edge concave side between an upstream end zone and a downstream end zone, which end zones are entirely of metal structure, on a lateral edge convex side between the end zones and a central zone that is essentially of metal structure, and on two top portions of the packing member that extend between the elastomer lateral edges on either side of the metal central zone. The metal structure also includes a bottom recess extending over its entire surface between the upstream end zone and the downstream end zone. Hence, the metal structure behaves like a spring blade when the blade turns following a violent impact.Type: ApplicationFiled: June 25, 2003Publication date: November 17, 2005Inventors: Anne Thenaisie, Alain Bassot, Eric Inghels, Herve Buisson, Chirstophe Follonnier, Patrick Reghezza, Bruce Pontoizeau
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Patent number: 6910866Abstract: A fan rotor includes a disk having a rim with a plurality of substantially axial grooves that are spaced apart angularly. Removable blades extend radially outwards from the periphery of the disk. Each blade has a blade root in a respective groove. A downstream flange plate can be secured to the disk with the downstream faces of the blade roots being in abutment against the downstream flange plate. An upstream flange plate is secured to the disk so as to retain the blade roots in the grooves. In the rotor, the upstream flange plate is fitted on its downstream face with a resilient device configured to exert sufficient force on the upstream faces of the blade roots, after assembly, to prevent an axial displacement of the blades during normal operation (apart from exceptional events of the type in which foreign bodies are ingested or blades are lost).Type: GrantFiled: September 11, 2003Date of Patent: June 28, 2005Assignee: Snecma MoteursInventors: Alain Bassot, Jean-Claude Bonny, Philippe Even, Pierre Lamothe, Alain Madec, Patrick Reghezza
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Publication number: 20050008491Abstract: The invention relates to a method of improving the retention capacity of a blade having an asymmetrical hammerhead connection and extending in a conical stream, with the root of the blade being retained in a peripheral groove in a disk, said groove having an upstream lip and a downstream lip presenting respective bearing surfaces that extend in planes that are asymmetrical relative to planes perpendicular to the axis of rotation of said disk, and against which the surfaces of the upstream and downstream flanks of said root come to bear, the bearing surface of said upstream lip being connected to the bottom wall of said groove via a rounded surface, and the upstream flank presenting, in the vicinity of said rounded surface, a heel situated inside a circle of radius R centered on the axis about which said blade tends to pivot when axial stress is applied thereto, said circle outlining, in the upstream lip, a crescent shape of thickness e, wherein: a) the connection between the bearing surface of the upstream liType: ApplicationFiled: June 30, 2004Publication date: January 13, 2005Applicant: SNECMA MOTEURSInventors: Christophe Follonier, Claude Lejars, Jerome Mace, Bruce Pontoizeau, Patrick Reghezza
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Publication number: 20040253113Abstract: The invention relates to a bladed disk for a turbomachine, the disk including blades which extend into a conical stream and which are held in a peripheral groove of said disk by hammerhead type fasteners, each of said blades further including a platform whose radially-outer face defines the boundary of the gas flow stream and whose radially-inner face presents an upstream rib and a downstream rib disposed in planes that are perpendicular to the axis of rotation of said disk and that are radially adjacent respectively to an upstream ring and a downstream ring formed at the periphery of said disk on either side of said groove in order to provide leaktightness in these zones, wherein the thickness of the downstream rib in the axial direction is greater than the thickness of the upstream ring.Type: ApplicationFiled: June 15, 2004Publication date: December 16, 2004Applicant: SNECMA MOTEURSInventors: Claude Lejars, Patrick Reghezza, Jerome Mace, Christophe Follonier, Bruce Pontoizeau
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Publication number: 20040126240Abstract: The invention relates to a fan rotor comprising a disk having a rim with a plurality of substantially axial grooves that are regularly spaced apart angularly, a plurality of removable blades extending radially outwards from the periphery of said disk, each blade having a blade root received in a respective groove, a downstream flange plate secured to said disk with the downstream faces of the blade roots being in abutment thereagainst, and a removable upstream flange plate secured to said disk for the purpose of retaining the blade roots in the grooves. In the rotor, the upstream flange plate is fitted on its downstream face with resilient means for exerting sufficient force on the upstream faces of the blade roots, after assembly, to prevent any axial displacement of the blades during normal operation of the engine (apart from exceptional events of the type in which foreign bodies are ingested or blades are lost).Type: ApplicationFiled: September 11, 2003Publication date: July 1, 2004Applicant: SNECMA MOTEURSInventors: Alain Bassot, Jean-Claude Bonny, Philippe Even, Pierre Lamothe, Alain Madec, Patrick Reghezza