Devismes
Marie-Françoise Devismes, Bernin FR
Patent application number | Description | Published |
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20100316885 | Assembly method by reactive brazing and vacuum cartridge assembled according to this method - The present invention relates to an assembly method by reactive brazing of a first metallic element such as an end cover plate of a vacuum cartridge with a second element such as the cylindrical body of said cartridge, said second element comprising an ion-covalent oxide at least at the surface by means of an alloy called added alloy designed to constitute a liquid brazing alloy designed to wet the two respectively metallic and ion-covalent oxide surfaces to be assembled of the above-mentioned two elements, said brazing alloy containing titanium and said metallic element containing nickel. This method is characterized in that in the case where the percentage by weight of the alloy elements content of the metal which can form intermetallic compounds with titanium is less than 20%, the titanium content in the brazing alloy is comprised between 2% and 5% by weight, and in the case where the percentage by weight of the alloy elements content of the metal which can form intermetallic compounds with titanium metal to be assembled is comprised between 20% and 50%, this titanium content is chosen between 5% and 10%, and in the case where the percentage by weight of the alloy elements content of the metal which can form intermetallic compounds with titanium is more than 50%, this titanium content is chosen between 2% and 5% and the percentage by weight of Ag is less than 60% so as to minimize the non-wettability areas on the surface of the second element made from ion-covalent oxide by forming a sufficiently thick and stable reactional layer at the interface of said element, and to minimize formation of intermetallic compounds in the brazed joint. | 12-16-2010 |
20110084117 | Device for assembly by brazing an end cap onto a cylindrical body and vacuum cartridge comprising one such device - The present invention relates to a device for assembly by brazing an end cover onto a cylindrical body, said end cover presenting a circular peripheral rim via which said cover is brazed onto a part of one of the end surfaces of the cylindrical body, this device being characterized in that the above-mentioned cover is shaped in such a way that, on the above-mentioned end surface of the cylindrical body, the circular peripheral part of the above-mentioned cover exerts a compressive stress, after brazing, on substantially the whole contact area between the end surface of the cover and the end surface of the cylindrical body. | 04-14-2011 |
Marie-Françoise Devismes, Bernin FR
Patent application number | Description | Published |
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20110084117 | Device for assembly by brazing an end cap onto a cylindrical body and vacuum cartridge comprising one such device - The present invention relates to a device for assembly by brazing an end cover onto a cylindrical body, said end cover presenting a circular peripheral rim via which said cover is brazed onto a part of one of the end surfaces of the cylindrical body, this device being characterized in that the above-mentioned cover is shaped in such a way that, on the above-mentioned end surface of the cylindrical body, the circular peripheral part of the above-mentioned cover exerts a compressive stress, after brazing, on substantially the whole contact area between the end surface of the cover and the end surface of the cylindrical body. | 04-14-2011 |
Stephane Devismes, Mathay FR
Patent application number | Description | Published |
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20090145118 | EXHAUST COMPONENT OF GAS EXHAUST LINE - The invention relates to an exhaust component in a gas exhaust line for gases produced by the combustion of a fuel in a heat engine. In the gas flow direction, there is a first connection to an upstream pipe carrying gases from the engine. There is also a first exhaust tube and a second exhaust tube, these two tubes being parallel and being connected to the first connection. There is a second connection to a downstream gas discharge pipe, connected to the parallel exhaust tubes. The component is characterized in that, firstly the first tube has a depolluting component, and the second tube has a silencer. The second connection is a three-way valve. | 06-11-2009 |