Patents by Inventor Claude Robert Louis Lejars
Claude Robert Louis Lejars 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: 9316113Abstract: A bushing for a variable set blade includes a cylindrical part configured to receive the blade, the root of the blade being able to rotate in the cylindrical part, and a base including: a first side able to be put in contact with a first edge of a circumferential groove of the ring, and/or a second side able to be put in contact with a second edge of the circumferential groove of the ring. At least one of the first side or second side of the base includes at least one bevel through which the first side or the second side is able to be put in contact with one of the first edge or second edge of the circumferential groove so as to block the bushing in rotation. The invention finds a particularly interesting application in the field of aircraft.Type: GrantFiled: September 13, 2011Date of Patent: April 19, 2016Assignee: SNECMAInventors: Pascal Gérard Gervais, Claude Robert Louis Lejars
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Patent number: 8721269Abstract: A variable-pitch vane for a stator stage includes an active part of the vane either side of which are positioned a radially inner platform and a radially outer platform, where the active part of the vane, which has a surface forming a convex surface, and a surface forming a concave surface, separate the platform into a part positioned on the convex side and a part positioned on the concave side. Seen along the direction of the vane's axis of rotation, the part has an outer outline superimposed on a circle, at the distance of which, and inside which, is at least a part of the outer outline of the part of the platform.Type: GrantFiled: January 8, 2010Date of Patent: May 13, 2014Assignee: SNECMAInventors: Aude Abadie, Claude Robert Louis Lejars
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Patent number: 8516910Abstract: A method of developing a tool for non-destructive inspection of parts of a turbomachine engine is disclosed. The method includes: a) making parts and/or sets of parts of an engine portion by prototyping from a digital model of the engine portion, and then assembling the parts and/or sets of parts in order to make a three-dimensional lifesize mock-up; and b) verifying that it is possible to pass the inspection tool through access orifices and/or passages of the mock-up until a distal end of the tool is situated in the vicinity of a part for inspection, and validating the tool or modifying its configuration or the configuration of the access orifices as a function of the results of the verification.Type: GrantFiled: July 8, 2010Date of Patent: August 27, 2013Assignee: SNECMAInventors: Sadia Bousquet, Claude Robert Louis Lejars, Sylvie Mozer, Alain Timon
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Patent number: 8162597Abstract: A stage of variable-pitch vanes for a turbomachine is disclosed. The vanes include internal pivots engaged in corresponding housings of a sectorized internal ring. Each ring sector includes axial orifices for mounting two pins for the radial retention of the ring sector on the internal pivot of a vane. Each pin includes an immobilization device cooperating by shape coupling with a complementary immobilization device of the other pin in order to rotationally immobilize these pins in the orifices in the ring sectors.Type: GrantFiled: August 25, 2008Date of Patent: April 24, 2012Assignee: SNECMAInventors: Claude Robert Louis LeJars, Richard Staessen
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Publication number: 20120063905Abstract: A bushing for a variable set blade includes a cylindrical part configured to receive the blade, the root of the blade being able to rotate in the cylindrical part, and a base including: a first side able to be put in contact with a first edge of a circumferential groove of the ring, and/or a second side able to be put in contact with a second edge of the circumferential groove of the ring. At least one of the first side or second side of the base includes at least one bevel through which the first side or the second side is able to be put in contact with one of the first edge or second edge of the circumferential groove so as to block the bushing in rotation. The invention finds a particularly interesting application in the field of aircraft.Type: ApplicationFiled: September 13, 2011Publication date: March 15, 2012Applicant: SNECMAInventors: Pascal Gérard Gervais, Claude Robert Louis Lejars
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Publication number: 20110293406Abstract: A variable-pitch vane for a stator stage including includes an active part of the vane either side of which are positioned a radially inner platform and a radially outer platform, where the active part of the vane, which has a surface forming a convex surface, and a surface forming a concave surface, separate the platform into a part positioned on the convex side and a part positioned on the concave side. Seen along the direction of the vane's axis of rotation, the part has an outer outline superimposed on a circle, at the distance of which, and inside which, is at least a part of the outer outline of the part of the platform.Type: ApplicationFiled: January 8, 2010Publication date: December 1, 2011Applicant: SNECMAInventors: Aude Abadie, Claude Robert Louis Lejars
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Patent number: 8038403Abstract: A turbomachine rotor wheel includes a disk carrying blades having roots engaged and held in an annular recess of the disk. The roots are connected to platforms for co-operating with an annular gasket mounted in an annular groove of the disk. The annular sealing gasket exerts a resilient force on the blade platforms holding the blades in a proper position for operation while the turbomachine is at rest.Type: GrantFiled: February 2, 2007Date of Patent: October 18, 2011Assignee: SNECMAInventors: Claude Robert Louis Lejars, Nicolas Christian Triconnet, Frederick Thise
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Publication number: 20110010152Abstract: A method of developing a tool for non-destructive inspection of parts of a turbomachine engine, the method comprising the steps consisting in: a) making parts and/or sets of parts of an engine portion by prototyping from a digital model of said engine portion, and then assembling said parts and/or sets of parts in order to make a three-dimensional lifesize mock-up; and b) verifying that it is possible to pass the inspection tool through access orifices and/or passages of the mock-up until a distal end of the tool is situated in the vicinity of a part for inspection, and validating the tool or modifying its configuration or the configuration of the access orifices as a function of the results of said verification.Type: ApplicationFiled: July 8, 2010Publication date: January 13, 2011Applicant: SNECMAInventors: Sadia Bousquet, Claude Robert Louis Lejars, Sylvie Mozer, Alain Timon
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Patent number: 7661925Abstract: A variable-setting stator blade guidance device of an axial turbomachine is provided. The blade includes an airfoil, a platform and a pivot mounted in the casing of the turbomachine. The device includes a bearing integrated into the platform. In particular, the device includes a bush sandwiched between the platform and the casing, and the integrated bearing is formed between the bush and the platform. In particular, the bush includes a cylindrical surface portion on the side of the platform cooperating with a matching cylindrical surface portion on the platform to form the integrated bearing.Type: GrantFiled: October 13, 2006Date of Patent: February 16, 2010Assignee: SNECMAInventors: Claude Robert Louis Lejars, Thierry Jean Maurice Niclot, Didier Raymond Charles Riby, Richard Staessen
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Patent number: 7614846Abstract: The invention relates to a ceramic-based bushing for mounting in a turbomachine casing to provide a smooth bearing for a pivot of a variable-pitch vane. The bushing is constituted by a metal jacket and a ceramic ring secured to the inside wall of said jacket by brazing. The invention also provides a turbomachine compressor having variable-pitch stator vanes with pivots mounted in the casing by means of such bushings.Type: GrantFiled: April 4, 2005Date of Patent: November 10, 2009Assignee: SnecmaInventors: Christelle Foucher, Claude Robert Louis Lejars, Didier Riby
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Patent number: 7524165Abstract: Control lever for the angular setting of a stator blade, comprising a first end intended to be fitted in a fixed manner on a blade pivot, a second end comprising a cylindrical pin for fitting on a control ring, and a flat intermediate part connecting the first and second ends having shapes and dimensions determined in order to increase the natural frequencies of the lever in flexion and in torsion above the vibratory frequencies of the turboshaft engine upstream of the lever and in order to retain the stiffness of the lever.Type: GrantFiled: September 16, 2005Date of Patent: April 28, 2009Assignee: SNECMAInventors: Sebastien Bourgoin, Christophe Follonier, Claude Robert Louis Lejars, Christophe Yvon Gabriel Tourne, Bruce Daniel Jean Pontoizeau, Nicolas Christian Triconnet
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Publication number: 20090087304Abstract: A stage of variable-pitch vanes for a turbomachine, these vanes (10) comprising internal pivots engaged in corresponding housings of a sectorized internal ring (12), each ring sector comprising axial orifices for mounting two pins (70, 76) for the radial retention of the ring sector on the internal pivot of a vane, wherein each pin (70, 76) comprises means (72, 78) cooperating by shape coupling with complementary means (78, 72) of the other pin (76, 70) in order to rotationally immobilize these pins in the orifices in the ring sectors.Type: ApplicationFiled: August 25, 2008Publication date: April 2, 2009Applicant: SNECMAInventors: Claude Robert Louis LEJARS, Richard Staessen
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Publication number: 20080025837Abstract: The present invention relates to a variable-setting stator blade guidance device of an axial turbomachine, the blade comprising an airfoil (22), a platform (23) and a pivot (24) mounted in the casing of the turbomachine. The device is characterized in that it comprises a bearing integrated into the platform. In particular, the device comprises a bush (26b) between the platform and the casing, and the integrated bearing is formed between the bush and the platform. In particular, the bush comprises a cylindrical surface portion (26b1) on the side of the platform interacting with a matching cylindrical surface portion (23b1) on the platform to form said integrated bearing.Type: ApplicationFiled: October 13, 2006Publication date: January 31, 2008Applicant: SNECMAInventors: Claude Robert Louis LEJARS, Thierry Jean Maurice Niclot, Didier Raymond Charles Riby, Richard Staessen
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Publication number: 20070183894Abstract: A turbomachine rotor wheel comprises a disk carrying blades having roots engaged and held in an annular recess of the disk, the roots being connected to platforms for co-operating with an annular gasket mounted in an annular groove of the disk, the annular sealing gasket exerting a resilient force on the blade platforms holding the blades in a proper position for operation while the turbomachine is at rest.Type: ApplicationFiled: February 2, 2007Publication date: August 9, 2007Applicant: SNECMAInventors: Claude Robert Louis LEJARS, Nicolas Christian Triconnet, Frederick Thise
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Patent number: 7163375Abstract: An interblade platform for a blade support disc on a turbojet blower includes a deflecting part with a lower face provided with a first fixing lug provided with a first orifice for the passage of a first fixing stud and a second fixing lug provided with second and third orifices for the passage of second and third fixing studs. The fixing studs are intended to fix the two fixing lugs to the support disc between two adjacent blades.Type: GrantFiled: July 19, 2004Date of Patent: January 16, 2007Assignee: Snecma MoteursInventors: Michele Jacqueline Queriault, Claude Robert Louis Lejars
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Patent number: 7153099Abstract: An inter-vane platform, for a vane support disk of a turbine engine fan, includes a central part of one piece with the support disk between two adjacent vanes, and two lateral parts, forming extensions to two lateral edges of the central part, and each designed in such a way as to deflect under the impact of the vane opposite which the lateral part is located.Type: GrantFiled: July 19, 2004Date of Patent: December 26, 2006Assignee: Snecma MoteursInventors: Michele Jacqueline Queriault, Claude Robert Louis Lejars
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Publication number: 20020090300Abstract: A turbojet engine fan rotor including a rotor disk having a peripheral rim with a plurality of axially extending channels carrying a plurality of fan blades each having a blade root interengaging with the channels of the disk, and a mounting arrangement for securing the blades to the disk. The mounting arrangement includes an annular member having a plurality of radially extending teeth, a plurality of wedges each interposed between one of the blade roots and a corresponding one of the channels and including a radially extending boss provided at one end, and a plurality of radially extending protrusions from the disk. The plurality of teeth and the plurality of protrusions cooperate with one another to secure the annular member with the rotor disk.Type: ApplicationFiled: January 10, 2002Publication date: July 11, 2002Inventors: Charles Jean-Pierre Douguet, Maurice Guy Judet, Claude Robert Louis Lejars, Thierry Nitre