Patents by Inventor Hakim Maazaoui
Hakim Maazaoui 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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Publication number: 20230143573Abstract: Electrolysis stack, including multiple layers that are stacked along a stacking direction, wherein each of the layers includes an anode space with an anode, a cathode space with a cathode and a membrane that separates the anode space and the cathode space from each other, wherein the anode space, the membrane and the cathode space are arranged adjacent to each other in the stated order along the stacking direction, and wherein each of the layers further includes a respective electrically insulating shell that surrounds the anode space and the cathode space so as to enclose the anode space and the cathode space radially with respect to the stacking direction, wherein the shell includes a groove on at least one of its end faces in the stacking direction, wherein the groove surrounds the anode space and the cathode space at least partially.Type: ApplicationFiled: November 10, 2022Publication date: May 11, 2023Inventors: Nicolas RICHET, Olivier DEBELLEMANIERE, Guillaume LODIER, Anh Thao THIEU, Hakim MAAZAOUI, Florent BEILLE
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Patent number: 9987709Abstract: The invention relates to a laser cutting method for cutting a stainless steel workpiece using laser beam generation means comprising a silica fiber with an ytterbium-doped core to generate the laser beam. Preferably, the laser beam generated by the ytterbium-based fiber has a wavelength between 1.07 and 1.09 ?m, a quality factor of the laser beam is between 0.33 and 8 mm·mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from O2, CO2, H2 and CH4.Type: GrantFiled: February 2, 2015Date of Patent: June 5, 2018Assignee: L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges ClaudeInventors: Francis Briand, Karim Chouf, Hakim Maazaoui
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Publication number: 20150174701Abstract: The invention relates to a laser cutting method for cutting a stainless steel workpiece using laser beam generation means comprising a silica fibre with an ytterbium-doped core to generate the laser beam. Preferably, the laser beam generated by the ytterbium-based fibre has a wavelength between 1.07 and 1.09 ?m, a quality factor of the laser beam is between 0.33 and 8 mm·mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from O2, CO2, H2 and CH4.Type: ApplicationFiled: February 2, 2015Publication date: June 25, 2015Inventors: Francis BRIAND, Karim CHOUF, Hakim MAAZAOUI
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Patent number: 8710400Abstract: The invention relates to a laser cutting method for cutting a C—Mn steel workpiece, characterized in that laser beam generation means comprising at least one silica fiber with an ytterbium-doped core is used to generate the laser beam. Preferably, the ytterbium-based fiber has a wavelength between 1.07 and 1.1 ?m, preferably 1.07 ?m, the quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon, oxygen, CO2 and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from H2 and CH4.Type: GrantFiled: June 2, 2011Date of Patent: April 29, 2014Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventors: Francis Briand, Karim Chouf, Hakim Maazaoui
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Patent number: 8278591Abstract: The invention relates to method for cutting a part using a laser beam, involving the use of laser beam generation means comprising at least one ytterbium-based fibre having a wavelength of between 1 and 4 ?m in order to generate the laser beam. The laser beam is selected to have a power of less than 100 kW, a power density of at least 1 MW/cm2, a focused beam diameter of at least 0.1 mm and a quality factor (BPP) of less than 10 mm·mrad.Type: GrantFiled: January 22, 2007Date of Patent: October 2, 2012Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventors: Karim Chouf, Hakim Maazaoui, Eric Verna, Françis Briand
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Publication number: 20120154922Abstract: The invention relates to a particular optical configuration employed in a solid-state laser, in particular a fiber laser, cutting head for controlling the problems of focal drift and laser damage of the optics of the focusing head and to a laser unit equipped with such a focusing head, in particular an ytterbium-doped fiber laser unit.Type: ApplicationFiled: August 17, 2010Publication date: June 21, 2012Applicant: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges ClaudeInventors: Francis Briand, Gaia Ballerini, Isabelle Debecker, Thomas Jouanneau, Hakim Maazaoui, Eric Verna
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Publication number: 20120024831Abstract: The invention relates to a laser cutting method for cutting a stainless steel workpiece using laser beam generation means comprising a silica fibre with an ytterbium-doped core to generate the laser beam. Preferably, the laser beam generated by the ytterbium-based fibre has a wavelength between 1.07 and 1.09 ?m, a quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from O2, CO2, H2 and CH4.Type: ApplicationFiled: June 2, 2011Publication date: February 2, 2012Applicants: La Soudure Autogene Francaise (Air Liquide Welding France), L'Air Liquide Societe Anonyme Pour I'Etude et I'Exploitation des Procedes Georges ClaudeInventors: Francis BRlAND, Karim CHOUF, Hakim MAAZAOUI
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Publication number: 20120012570Abstract: The invention relates to a laser cutting method for cutting a C—Mn steel workpiece, characterized in that laser beam generation means comprising at least one silica fiber with an ytterbium-doped core is used to generate the laser beam. Preferably, the ytterbium-based fiber has a wavelength between 1.07 and 1.1 ?m, preferably 1.07 ?m, the quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon, oxygen, CO2 and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from H2 and CH4.Type: ApplicationFiled: June 2, 2011Publication date: January 19, 2012Applicants: L'Air Liquide Welding France (La Soudure Autogéne Française, L'Air Liquide Société Anonyme pour I'Etude et I'Exploitation des Procédés Georges ClaudeInventors: Francis Briand, Karim Chouf, Hakim Maazaoui
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Publication number: 20110248005Abstract: A method of cutting a work-piece to be cut by a laser beam, in which an incident laser beam is generated that has an initial beam parameter product (BPP), given by means of a laser source, preferably an ytterbium-doped or erbium-doped fiber laser source, coupled to at least one optical fiber for conveying the beam. Said incident laser beam is brought to a focusing head comprising at least one optical focusing device. The incident laser beam is focused by means of said optical focusing device, so as to obtain a focused laser beam, and the work-piece is cut by means of the focused laser beam. According to the invention, the quality factor of the incident laser beam is adjusted or modified by means of an optical device designed to be able to modify or vary the BPP of a laser beam so as to obtain a modified focused laser beam having a modified BPP which is different from the BPP of said incident laser beam. Associated equipment for implementing said method.Type: ApplicationFiled: August 26, 2009Publication date: October 13, 2011Applicant: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges ClaudeInventors: Francis Briand, Gaia Ballerini, Isabelle Debecker, Hakim Maazaoui, Erie Verna
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Publication number: 20090218326Abstract: The invention relates to method for cutting a part using a laser beam, involving the use of laser beam generation means comprising at least one ytterbium-based fibre having a wavelength of between 1 and 4 ?m in order to generate the laser beam. The laser beam is selected to have a power of less than 100 kW, a power density of at least 1 MW/cm2, a focused beam diameter of at least 0.1 mm and a quality factor (BPP) of less than 10 mm·mrad.Type: ApplicationFiled: January 22, 2007Publication date: September 3, 2009Applicant: L'AIR LIQUIDE SOCIETE ANONYME POUR L'EPLOITATION DES PROCEDES GEORGES CLADUEInventors: Karim Chouf, Hakim Maazaoui, Erie Verna, Francis Briand
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Publication number: 20070119833Abstract: The invention relates to a laser cutting method for cutting a C-Mn steel workpiece, characterized in that laser beam generation means comprising at least one silica fiber with an ytterbium-doped core is used to generate the laser beam. Preferably, the ytterbium-based fiber has a wavelength between 1.07 and 1.1 ?m, preferably 1.07 ?m, the quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon, oxygen, CO2 and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from H2 and CH4.Type: ApplicationFiled: November 15, 2006Publication date: May 31, 2007Applicants: L'Air Liquide Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude, Air Liquide Welding France (La Soudure Autogene Francaise)Inventors: Francis Briand, Karim Chouf, Hakim Maazaoui
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Publication number: 20070119834Abstract: The invention relates to a laser cutting method for cutting a stainless steel workpiece using laser beam generation means comprising a silica fibre with an ytterbium-doped core to generate the laser beam. Preferably, the laser beam generated by the ytterbium-based fibre has a wavelength between 1.07 and 1.09 ?m, a quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from O2, CO2, H2 and CH4.Type: ApplicationFiled: November 15, 2006Publication date: May 31, 2007Applicants: L'Air Liquide Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude, La Soudure Autogene Francaise (Air Liquide Welding France)Inventors: Francis Briand, Karim Chouf, Hakim Maazaoui
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Publication number: 20060196859Abstract: Methods for laser beam cutting metal workpieces with a thickness between 4 mm and 25 mm. A double focusing lens is provided to make it possible to focus a laser beam on a first focusing and a second focusing point. These points are separate from each other and both lie on the laser's optical axis. The lens has a focal length between 170 mm and 300 mm.Type: ApplicationFiled: January 3, 2006Publication date: September 7, 2006Inventors: Christophe Bertez, Karim Chouf, Hakim Maazaoui
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Publication number: 20060186099Abstract: The invention relates to a method for laser-beam cutting a metal workpiece having a thickness of less than 5 mm, in which a double focusing lens is employed making it possible to focus the laser beam at least at a first focusing point (PF1) and a second focusing point (PF2) which are separate from each other and lie on the beam axis, characterized in that the lens has a focal length (FL) of between 80 and 135 mm.Type: ApplicationFiled: January 3, 2006Publication date: August 24, 2006Inventors: Christophe Bertez, Karim Chouf, Hakim Maazaoui