Patents by Inventor Alexander M. Rubenchik
Alexander M. Rubenchik 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: 11712750Abstract: The present disclosure relates to a laser system for processing a material. The system may make use of a laser configured to intermittently generate a first laser pulse of a first duration and a first average power, at a spot on a surface of the material being processed, and a second laser pulse having a second duration and a second peak power. The second duration may be shorter than the first duration by a factor of at least 100, and directed at the spot. The second laser pulse is generated after the first laser pulse is generated. The first laser pulse is used to heat the spot on the surface of the material, while the second laser pulse induces a melt motion and material ejection of molten material from the melt pool.Type: GrantFiled: March 22, 2019Date of Patent: August 1, 2023Assignee: Lawrence Livermore National Security, LLCInventors: Sonny S. Ly, Jeffrey D. Bude, Gabriel Mark Guss, Wesley John Keller, Raluca A. Negres, Alexander M. Rubenchik, Nan Shen
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Patent number: 11358237Abstract: Systems for processing a material by submerging the material in a fluid and directing laser pulses at the fluid and the material for processing the material. An embodiment removes the surface of concrete, brick, or rock or minerals in a relatively gentle, energy-efficient, and controlled manner that also confines the material that is removed.Type: GrantFiled: May 31, 2018Date of Patent: June 14, 2022Assignee: Lawrence Livermore National Security, LLCInventors: Raymond P. Mariella, Jr., Alexander M. Rubenchik, Mary A. Norton
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Patent number: 11141912Abstract: A laser powder bed fusion additive manufacturing system having a powder dispenser that provides powder layers on a build platform; a laser fusion system that fuses the powder layers, wherein spatter particles are produce on the powder layers; and a powder bed sweeping system that sweeps the spatter particles from the powder layers. The powder bed sweeping system includes a brush that has bristles that contact the spatter particles and sweeps the spatter particles from the powder layers.Type: GrantFiled: October 10, 2019Date of Patent: October 12, 2021Assignee: Lawrence Livermore National Laboratory, LLCInventors: Saad A. Khairallah, Gabe Guss, Eric B. Herbold, Wayne E. King, Manyalibo J. Matthews, Alexander M. Rubenchik, Otis R. Walton
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Patent number: 10994337Abstract: An intelligent feed forward model to control additive manufacturing (AM) laser powder bed fusion process and reduce spattering whereby defects are eliminated by controlling the laser power and reducing spattering through a computer model. This application describes using a proportional integral derivative (PID) controller to create a power map that reduces spattering.Type: GrantFiled: December 12, 2018Date of Patent: May 4, 2021Assignee: Lawrence Livermore National Security, LLCInventors: Saad A. Khairallah, Gabe Guss, Wayne E. King, Sonny S. Ly, Manyalibo Joseph Matthews, Alexander M. Rubenchik
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Publication number: 20210107214Abstract: A laser powder bed fusion additive manufacturing system having a powder dispenser that provides powder layers on a build platform; a laser fusion system that fuses the powder layers, wherein spatter particles are produce on the powder layers; and a powder bed sweeping system that sweeps the spatter particles from the powder layers. The powder bed sweeping system includes a brush that has bristles that contact the spatter particles and sweeps the spatter particles from the powder layers.Type: ApplicationFiled: October 10, 2019Publication date: April 15, 2021Inventors: Saad A. Khairallah, Gabe Guss, Eric B. Herbold, Wayne E. King, Manyalibo J. Matthews, Alexander M. Rubenchik, Otis R. Walton
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Patent number: 10978849Abstract: A high-power laser beam with an arbitrary intensity profile is produced. Such beam has a variety of uses including for laser materials processing such as powder bed fusion additive manufacturing. Several challenges in additive manufacturing are mitigated with the present non-uniform intensity laser profiles. Nonuniform shapes include a set of intensity pixels in a line that could print a wide stripe area instead of just a single line. One example uses the multimode interference pattern from the output of a ribbon fiber which is imaged onto a work piece. The interference pattern is controlled to allow turning on or off of ‘pixels’ along a line which can be used to shape the beam and form the additively manufactured part.Type: GrantFiled: January 31, 2019Date of Patent: April 13, 2021Assignee: LAWRENCE LIVERMORE NATIONAL SECURITY, LLCInventors: Derrek R. Drachenberg, Jay W. Dawson, Gabriel M. Guss, Paul H. Pax, Alexander M. Rubenchik, Manyilibo J. Matthews
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Publication number: 20210023658Abstract: The present disclosure relates to a laser-based system and method for providing efficient melt removal of material from a surface of a material sample being acted on in a laser machining operation. In one implementation the system may make use of a continuous wave (CW) laser for generating a laser beam directed at a spot on the surface of the material sample. The CW laser may be configured to be modulated at a predetermined frequency such that the laser beam excites and amplifies surface capillary waves on the surface of the sample up to a melt ejection point, which ejects molten material from the spot being acted on by the laser beam, to more rapidly facilitate material removal from the spot.Type: ApplicationFiled: March 22, 2019Publication date: January 28, 2021Applicant: LAWRENCE LIVERMORE NATIONAL SECURITY, LLCInventors: Sonny S. LY, Jeffrey D. BUDE, Gabriel Mark GUSS, Wesley John KELLER, Raluca A. NEGRES, Alexander M. RUBENCHIK, Nan SHEN
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Publication number: 20210001427Abstract: The present disclosure relates to a laser system for processing a material. The system may make use of a laser configured to intermittently generate a first laser pulse of a first duration and a first average power, at a spot on a surface of the material being processed, and a second laser pulse having a second duration and a second peak power. The second duration may be shorter than the first duration by a factor of at least 100, and directed at the spot. The second laser pulse is generated after the first laser pulse is generated. The first laser pulse is used to heat the spot on the surface of the material, while the second laser pulse induces a melt motion and material ejection of molten material from the melt pool.Type: ApplicationFiled: March 22, 2019Publication date: January 7, 2021Applicant: LAWRENCE LIVERMORE NATIONAL SECURITY, LLCInventors: Sonny S. LY, Jeffrey D. BUDE, Gabriel Mark GUSS, Wesley John KELLER, Raluca A. NEGRES, Alexander M. RUBENCHIK, Nan SHEN
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Patent number: 10870173Abstract: Systems for processing a material by submerging the material in a fluid and directing laser pulses at the fluid and the material for processing the material. An embodiment removes the surface of concrete, brick, or rock or minerals in a relatively gentle, energy-efficient, and controlled manner that also confines the material that is removed.Type: GrantFiled: May 31, 2018Date of Patent: December 22, 2020Assignee: Lawrence Livermore National Security, LLCInventors: Raymond P. Mariella, Jr., Alexander M. Rubenchik, Mary A. Norton
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Publication number: 20200279664Abstract: Fabricating structural components for a spent nuclear fuel container using the steps of forming cylindrical or rectangular channels to produce a structural component for a spent nuclear fuel container and applying a coating that includes tantalum-based material to the cylindrical or rectangular channels.Type: ApplicationFiled: May 8, 2020Publication date: September 3, 2020Inventors: Joseph C. Farmer, Jor-Shan Choi, Alexander M. Rubenchik
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Publication number: 20200251872Abstract: A high-power laser beam with an arbitrary intensity profile is produced. Such beam has a variety of uses including for laser materials processing such as powder bed fusion additive manufacturing. Several challenges in additive manufacturing are mitigated with the present non-uniform intensity laser profiles. Nonuniform shapes include a set of intensity pixels in a line that could print a wide stripe area instead of just a single line. One example uses the multimode interference pattern from the output of a ribbon fiber which is imaged onto a work piece. The interference pattern is controlled to allow turning on or off of ‘pixels’ along a line which can be used to shape the beam and form the additively manufactured part.Type: ApplicationFiled: January 31, 2019Publication date: August 6, 2020Applicant: Lawrence Livermore National Security, LLC.Inventors: Derrek R. Drachenberg, Jay W. Dawson, Gabriel M. Guss, Paul H. Pax, Alexander M. Rubenchik, Manyilibo J. Matthews
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Publication number: 20200189183Abstract: An intelligent feed forward model to control additive manufacturing (AM) laser powder bed fusion process and reduce spattering whereby defects are eliminated by controlling the laser power and reducing spattering through a computer model. This application describes using a proportional integral derivative (PID) controller to create a power map that reduces spattering.Type: ApplicationFiled: December 12, 2018Publication date: June 18, 2020Inventors: Saad A. Khairallah, Gabe Guss, Wayne E. King, Sonny S. Ly, Manyalibo Joseph Matthews, Alexander M. Rubenchik
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Patent number: 10679761Abstract: Fabricating structural components for a spent nuclear fuel container using the steps of forming cylindrical or rectangular channels to produce a structural component for a spent nuclear fuel container and applying a coating that includes tantalum-based material to the cylindrical or rectangular channels.Type: GrantFiled: March 14, 2014Date of Patent: June 9, 2020Assignee: Lawerence Livermore National Security, LLCInventors: Joseph C. Farmer, Jor-Shan Choi, Alexander M. Rubenchik
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Publication number: 20200152343Abstract: Fabricating structural components for a spent nuclear fuel container using the steps of forming cylindrical or rectangular channels to produce a structural component for a spent nuclear fuel container and applying a coating that includes tantalum-based material to the cylindrical or rectangular channels.Type: ApplicationFiled: March 14, 2014Publication date: May 14, 2020Inventors: Joseph C. Farmer, Jor-Shan Choi, Alexander M. Rubenchik
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Patent number: 10646960Abstract: The present disclosure relates to a powdered bed fusion additive manufacturing (PBFAM) apparatus. The apparatus uses a container for holding a quantity of powdered material. The container has a bottom wall for supporting the powdered material, wherein the bottom wall is made from the same material as the powdered material. A temperature sensing subsystem is coupled to a portion of the container for detecting a temperature of the container. A laser generates an optical beam directed at the powdered material held by the container for melting the powdered material. A controller receives temperature information from the temperature sensing subsystem and determines an absorptivity of the powdered material based on the temperature information.Type: GrantFiled: October 3, 2017Date of Patent: May 12, 2020Assignee: Lawrence Livermore National Security, LLCInventors: Alexander M. Rubenchik, Manyalibo Joseph Matthews, Johannes Trapp
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Patent number: 10647064Abstract: An apparatus for use in a friction stir operation, such as friction stir welding (FSW) or friction stir processing (FSP). The apparatus may have a rotating tool adapted to be plunged into a material, where the material is susceptible to being softened by heating. The rotating tool may further be adapted to be advanced along a surface of the material. An optical energy generating subsystem may be used to heat a portion of the material using optical energy as the tool is advanced along the material.Type: GrantFiled: October 16, 2012Date of Patent: May 12, 2020Assignee: Lawrence Livermore National Security, LLCInventors: Joseph C. Farmer, Alexander M. Rubenchik, Raymond J. Beach, Robert J. Deri, Edward I. Moses, Bassem S. El-Dasher, Sarath K. Menon, Terry McNelley
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Patent number: 10583526Abstract: Systems for processing a material by submerging the material in a fluid and directing laser pulses at the fluid and the material for processing the material. An embodiment removes the surface of concrete, brick, or rock or minerals in a relatively gentle, energy-efficient, and controlled manner that also confines the material that is removed.Type: GrantFiled: January 10, 2014Date of Patent: March 10, 2020Assignee: Lawrence Livermore National Security, LLCInventors: Raymond P. Mariella, Jr., Alexander M. Rubenchik, Mary A. Norton
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Patent number: 10390709Abstract: A system for detecting pressure, acoustic or ultrasound waves within an entity having a surface including the steps of attaching a signal converting material to the surface. The waves are generated by direct ejection from the surface, generation via energy deposition on the surface, generated spontaneously or, generated by directing light energy to the light absorbing target. The absorbing target subsequently generates acoustic pressure waves. The acoustic waves propagate to the surface of the entity and the signal converting material, wherein the acoustic pressure waves create vibrations in the signal converting material; and detecting the waves in the signal converting material with an optical detection system. Information about the absorbing target is obtained by the absorbing target reflecting the waves. The signal converting material can be a gel-like material containing optical elements, a multi-layer patch, or other material.Type: GrantFiled: March 13, 2012Date of Patent: August 27, 2019Assignee: Lawrence Livermore National Security, LLCInventors: Stavros G. Demos, Alexander M. Rubenchik
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Publication number: 20190099837Abstract: The present disclosure relates to a powdered bed fusion additive manufacturing (PBFAM) apparatus. The apparatus uses a container for holding a quantity of powdered material. The container has a bottom wall for supporting the powdered material, wherein the bottom wall is made from the same material as the powdered material. A temperature sensing subsystem is coupled to a portion of the container for detecting a temperature of the container. A laser generates an optical beam directed at the powdered material held by the container for melting the powdered material. A controller receives temperature information from the temperature sensing subsystem and determines an absorptivity of the powdered material based on the temperature information.Type: ApplicationFiled: October 3, 2017Publication date: April 4, 2019Inventors: Alexander M. RUBENCHIK, Manyalibo Joseph MATTHEWS, Johannes TRAPP
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Patent number: 10222253Abstract: A system for aerially surveying an area where a plane may have crashed in water and locating pings from the plane's black box using a laser on an aerial platform that produces laser pulses; using a launch telescope to direct the laser pulses to the water producing scattering from the laser pulses and a continuous stream of backscatter; using a receiving telescope to collect the continuous stream of backscatter; using an interferometer operatively connected to the receiving telescope to produce two outputs, wherein one output is the continuous stream of backscatter, and wherein the other output is a delayed replica of the first output; and using a data collection and analysis unit operatively connected to the interferometer to produce a measurement of the sound.Type: GrantFiled: June 7, 2016Date of Patent: March 5, 2019Assignee: Lawrence Livermore National Security, LLCInventors: Jay W. Dawson, Graham S. Allen, Michael R. Carter, John E. Heebner, Michael J. Messerly, Paul H. Pax, Alexander M. Rubenchik