Patents by Inventor Patrick Wehrer
Patrick Wehrer 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: 9358645Abstract: A method for finishing a shape of a component by machining, in which one area is produced by smelting with a thickened portion forming a first surface with a surrounding profile and a theoretical profile defined by a second surface, the method including: defining, on the second surface, a grid forming nodes and squares; defining each point over which the machining tool is to pass according to weighting coefficients equal to weight to be given to the nodes of the square in which the tool is located, to be the barycenter of assigned nodes of the coefficients; measuring, for each node located outside an outer limit, the delta between the first surface at the node and the theoretical position of the node; calculating deltas for each node within the outer limit by interpolation from already known deltas; using the weighting coefficients, defining the delta to be applied at each point.Type: GrantFiled: June 21, 2012Date of Patent: June 7, 2016Assignee: SNECMAInventors: Yvon Marie-Joseph Louesdon, Joseph Tami-Lizuzu, Daniel Quach, Patrick Wehrer, Didier Legeai
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Patent number: 8763678Abstract: A mold for producing a part, such as a turbomachine blade model, by injecting wax into a cavity, the cavity including at least two cavity elements, each of which is supported in a cavity block. The two cavity blocks are mobile relative to one another between a closed position for injecting the wax and an open position for removing the part following the injection of the wax. The two cavity blocks are mobile in a horizontal plane.Type: GrantFiled: October 5, 2011Date of Patent: July 1, 2014Assignee: SNECMAInventors: Daniel Quach, Yvon Marie-Joseph Louesdon, Patrick Pourfilet, Jean-Louis Martial Verger, Patrick Wehrer
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Publication number: 20140137409Abstract: A method for finishing a shape of a component by machining, in which one area is produced by smelting with a thickened portion forming a first surface with a surrounding profile and a theoretical profile defined by a second surface, the method including: defining, on the second surface, a grid forming nodes and squares; defining each point over which the machining tool is to pass according to weighting coefficients equal to weight to be given to the nodes of the square in which the tool is located, to be the barycenter of assigned nodes of the coefficients; measuring, for each node located outside an outer limit, the delta between the first surface at the node and the theoretical position of the node; calculating deltas for each node within the outer limit by interpolation from already known deltas; using the weighting coefficients, defining the delta to be applied at each point.Type: ApplicationFiled: June 21, 2012Publication date: May 22, 2014Applicant: SNECMAInventors: Yvon Marie-Joseph Louesdon, Joseph Tami-Lizuzu, Daniel Quach, Patrick Wehrer, Didier Legeai
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Patent number: 8490673Abstract: A method for deburring a ceramic foundry core obtained by injecting a ceramic paste, the paste including a binder having a predetermined glass transition temperature, into a mold and having at least one surface portion with a surplus of material forming a burr to be eliminated. The method includes the following stages: a) disposing and attaching the molded, unfired foundry core onto a mounting; b) placing a milling tool, having an elongated shape with a helically cut edge, onto a tool holder; c) causing the tool to rotate around its axis and touching the milling tool to the surface portion to be deburred; and d) freezing the surface portion to be deburred such that the foundry core is maintained at a temperature lower than a glass transition temperature during the deburring operation.Type: GrantFiled: April 17, 2009Date of Patent: July 23, 2013Assignee: SNECMAInventors: Christian Defrocourt, Serge Prigent, Daniel Quach, Patrick Wehrer
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Publication number: 20130174997Abstract: A mold for producing a part, such as a turbomachine blade model, by injecting wax into a cavity, the cavity including at least two cavity elements, each of which is supported in a cavity block. The two cavity blocks are mobile relative to one another between a closed position for injecting the wax and an open position for removing the part following the injection of the wax. The two cavity blocks are mobile in a horizontal plane.Type: ApplicationFiled: October 5, 2011Publication date: July 11, 2013Applicant: SNECMAInventors: Daniel Quach, Yvon Marie-Joseph Louesdon, Patrick Pourfilet, Jean-Louis Martial Verger, Patrick Wehrer
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Publication number: 20110049748Abstract: The present invention relates to a method for deburring a ceramic foundry core (10) obtained by injecting a ceramic paste, said paste including a binder having a predetermined glass transition temperature, into a mold and having at least one surface portion with a surplus of material forming a burr (B) to be eliminated. The method is characterized in that it includes the following stages: a) disposing and attaching the molded, unfired foundry core (10) onto a mounting (300); b) placing a milling tool (100), having an elongated shape with a helically cut edge, onto a tool holder; c) causing the tool to rotate around its axis and touching the milling tool to said surface portion to be deburred; and d) freezing (400) the surface portion to be deburred such that the foundry core is maintained at a temperature lower than said glass transition temperature during the deburring operation.Type: ApplicationFiled: April 17, 2009Publication date: March 3, 2011Applicant: SNECMAInventors: Christian Defrocourt, Serge Prigent, Daniel Quach, Patrick Wehrer
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Patent number: 7533714Abstract: A process for manufacturing a ceramic foundry core having at least one thin region with a thickness “e”, in particular in of a turbomachine blade trailing edge, including the forming in a mold of a mixture including a ceramic particle filler and an organic binder, the extraction of the core from the mold, the binder removal and consolidation heat treatment of the core. The process is one in which a core is formed in the mold, the region of this core being thickened relative to the thickness “e” by an overthickness E and in which the overthickness is machined after the core has been extracted from the mold and before or after the heat treatment operation. In particular, the machining is carried out mechanically by milling, either with removal of chips on the cores before firing, or by abrasion on the fired cores.Type: GrantFiled: May 1, 2007Date of Patent: May 19, 2009Assignee: SNECMAInventors: Didier Guerche, Serge Prigent, Patrick Wehrer
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Publication number: 20070261811Abstract: The invention relates a process for manufacturing a ceramic foundry core having at least one thin region with a thickness “e”, in particular in of a turbomachine blade trailing edge, comprising the forming in a mold of a mixture comprising a ceramic particle filler and an organic binder, the extraction of the core from the mold, the binder removal and consolidation heat treatment of the core. The process is one in which a core is formed in said mold, said region of this core being thickened relative to the thickness “e” by an overthickness E and in which said overthickness is machined after the core has been extracted from the mold and before or after the heat treatment operation. In particular, the machining is carried out mechanically by milling, either with removal of chips on the cores before firing, or by abrasion on the fired cores.Type: ApplicationFiled: May 1, 2007Publication date: November 15, 2007Applicant: SNECMAInventors: Didier Guerche, Serge Prigent, Patrick Wehrer