Patents by Inventor Shailesh N. Joshi
Shailesh N. Joshi 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: 12064708Abstract: A vapor chamber includes a wick structure created by an additive selective laser sintering process. The wick structure includes a substrate, a first copper powder layer, a second copper powder layer, and a plurality of additional layers. The first copper powder layer is deposited across the substrate, wherein the first copper powder layer is subsequently selectively fused via a fusing instrument. The second copper powder layer is deposited across the first copper powder layer, wherein the second copper powder layer is subsequently selectively fused via the fusing instrument. Additionally, a plurality of additional copper powder layers are deposited wherein each additional layer is deposited on the previous layer, wherein each of the additional copper powder layers is selectively fused with a predetermined structure.Type: GrantFiled: February 1, 2021Date of Patent: August 20, 2024Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.Inventors: Ercan Dede, Feng Zhou, Shailesh N. Joshi
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Patent number: 12062593Abstract: A power device assembly includes a heat-generating device, one or more porous bonding layers, and one or more cap layers. The one or more porous bonding layers are formed on a surface of the heat-generating device and define a plurality of embedded vapor channels. The one or more cap layers are engaged with a porous bonding layer of the one or more porous bonding layers opposite the heat-generating device. The one or more cap layer comprise a plurality of liquid feed channels for feeding cooling fluid to the heat-generating device via the porous bonding layer.Type: GrantFiled: March 30, 2021Date of Patent: August 13, 2024Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Shailesh N. Joshi, Ercan Mehmet Dede, Feng Zhou, Hiroshi Ukegawa, Danny Lohan
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Cooling system for aircraft components including ram chute body and relatively rotatable air conduit
Patent number: 12043400Abstract: A ram chute assembly is provided for directing a flow of cooling air into a hollow wing structure of an aircraft. The ram chute assembly includes a ram chute body defining an interior passage, and an air inlet enabling an airflow from an exterior of the ram chute body into the interior passage. The assembly is structured to be attachable to an exterior of an engine nacelle so as to receive propeller wash air through the air inlet into the interior passage when a propeller of the engine nacelle is rotating. The ram chute assembly is also structured to discharge the propeller wash air in a direction toward an air intake opening formed in an upper surface of a hollow wing structure on which the engine nacelle is mounted.Type: GrantFiled: March 29, 2022Date of Patent: July 23, 2024Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Shailesh N. Joshi, Danny J. Lohan, Hiroshi Ukegawa -
Publication number: 20240210936Abstract: Systems, methods, and other embodiments described herein relate to predicting anomalous operation of a device and an associated remaining useful life (RUL). In one embodiment, a method includes acquiring usage information about operation of an electronic device. The method includes selecting at least one feature from the usage information according to an optimization. The method includes determining whether the least one feature indicates a presence of an anomaly in the operation of the electronic device according to an anomaly model. The method includes, responsive to detecting the anomaly, determining a remaining useful life (RUL) for the electronic device according to a RUL model. The method includes providing the RUL.Type: ApplicationFiled: January 29, 2024Publication date: June 27, 2024Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., University of ConnecticutInventors: Hiroshi Ukegawa, Qian Yang, Krishna Pattipati, Shailesh N. Joshi
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Patent number: 12017786Abstract: An auxiliary fan based hybrid cooling system of an electric machine is contemplated. The hybrid cooling system comprises a propeller positioned on an exterior portion of an enclosure and mechanically coupled to a rotor, at least one electronic component, a stator, the rotor, and an auxiliary fan disposed within the enclosure, and wherein: in a single cooling mode, the propeller rotates to generate air that is channeled into the enclosure, in a dual cooling mode: the propeller rotates to generate the air that is channeled into the enclosure, a coupling mechanism simultaneously engages the rotor and the auxiliary fan and links the propeller to the auxiliary fan by the engaging of the rotor with the auxiliary fan, and the auxiliary fan, rotates responsive to the rotation of the propeller in the dual cooling mode.Type: GrantFiled: March 30, 2022Date of Patent: June 25, 2024Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.Inventors: Shailesh N. Joshi, Hiroshi Ukegawa
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Publication number: 20240199206Abstract: A morphing aerodynamic structure includes a body with an outer covering, a bridle attached to the body, and a light-response polymer disposed on at least one of the outer covering and the bridle. The light-responsive polymer is configured to change shape when illuminated with a laser such that at least one of an angle of attack, roll, pitch and yaw of the morphing aerodynamic structure is at least partially controlled without the use of a mechanical or pneumatic control unit.Type: ApplicationFiled: December 20, 2022Publication date: June 20, 2024Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Yuyang Song, Shailesh N. Joshi, Danil V. Prokhorov, Umesh N. Gandhi
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Publication number: 20240193025Abstract: Systems, methods, and other embodiments described herein relate to predicting anomalous operation of a device and an associated remaining useful life (RUL) estimation. In one embodiment, a method includes acquiring usage information about the operation of an electronic device. The method includes determining whether the usage information indicates the presence of an anomaly in the operation of the electronic device according to an anomaly model. The method includes, responsive to detecting the anomaly, determining a remaining useful life (RUL) for the electronic device according to a RUL model. The method includes providing the RUL estimate.Type: ApplicationFiled: March 31, 2023Publication date: June 13, 2024Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., University of ConnecticutInventors: Hiroshi Ukegawa, Raymond P. Viviano, Shailesh N. Joshi, Qian Yang, Krishna Pattipati
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Patent number: 11999152Abstract: A passive thermal management system and methods of using a thermoresponsive hydrogel coating configured to autonomously switch between a heating state and a cooling state based on ambient temperature. At temperature greater than a lower critical solution temperature of the thermoresponsive hydrogel, the thermoresponsive hydrogel coating becomes solar reflective and has enhanced radiative cooling ability to achieve daytime radiative cooling. At temperatures less than the lower critical solution temperature, the thermoresponsive hydrogel coating becomes transparent to facilitate absorption of solar radiation by sun absorber.Type: GrantFiled: December 17, 2021Date of Patent: June 4, 2024Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of IllinoisInventors: Shailesh N. Joshi, Dajie Xie, Paul Braun
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Patent number: 11986759Abstract: Disclosed is a vehicle comprising a wheel with an associated air-cooled motor, and a ventilation path for passing outside air from outside the vehicle into the motor. An electrostatic device is disposed proximate to the ventilation path. When the electrostatic device is energized, particles or debris in the outside air are attracted toward or repelled from the electrostatic device, such that the particles or debris are removed from the outside air before the outside air enters the motor.Type: GrantFiled: November 30, 2020Date of Patent: May 21, 2024Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.Inventors: Shailesh N. Joshi, Ryohei Tsuruta, Umesh Gandhi
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Patent number: 11933546Abstract: A thermal compensation layer includes a metal inverse opal (MIO) layer that includes a plurality of core-shell phase change (PC) particles encapsulated within a metal of the MIO layer. Each of the core-shell PC particles includes a core that includes a PCM having a PC temperature in a range of from 100° C. to 250° C., and a shell that includes a shell material having a melt temperature greater than the PC temperature of the PCM. A power electronics assembly includes a substrate having a thermal compensation layer formed proximate a surface of the substrate, the thermal compensation layer comprising an MIO layer that includes a plurality of core-shell PC particles encapsulated within a metal of the MIO layer. The power electronics assembly further includes an electronic device bonded to the thermal compensation layer at a first surface of the electronic device.Type: GrantFiled: June 11, 2021Date of Patent: March 19, 2024Assignee: Toyota Motor North America, Inc.Inventors: Shailesh N. Joshi, Ercan Mehmet Dede
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Patent number: 11932114Abstract: Methods, apparatuses and systems to provide for technology to that includes a first power electronics module including a plurality of first transistors that are diagonally offset from each other, and a second power electronics module stacked on the first power electronics module. The second power electronics module includes second transistors that are diagonally offset from each other. The second transistors are staggered relative to the first transistors.Type: GrantFiled: October 29, 2020Date of Patent: March 19, 2024Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Hitoshi Fujioka, Shailesh N. Joshi, Danny J. Lohan
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Patent number: 11920252Abstract: A method of decomposing a cured aromatic epoxy resin uses a molten salt bath at less than about 350° C. The molten salt bath includes a plurality of alkali metal hydroxides. The cured aromatic epoxy resin can be in intimate physical contact with a metal or alloy. The cured aromatic epoxy resin can be patterned by a lithographic method. The lithographic method can be multibeam interference lithography to form a three-dimensional photonic crystal template on a conductive substrate for electrodeposition of metal. Contacting the three-dimensional photonic crystal template with the electrodeposited metal with the molten salt bath can form a metal matrix device displaying a periodic pattern that is the inverse of the periodic pattern of the decomposed three-dimensional photonic crystal template.Type: GrantFiled: August 5, 2021Date of Patent: March 5, 2024Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of IllinoisInventors: Shailesh N. Joshi, Gaurav Singhal, Paul Vannest Braun, Danny J. Lohan, Kai-Wei Lan
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Patent number: 11914304Abstract: A method to control the density of a three-dimensional photonic crystal template involves changing the irradiation time from at least four laser beams to yield a periodic percolating matrix of mass and voids free of condensed matter from a photoresist composition. The photoresist composition includes a photoinitiator at a concentration where the dose or irradiation is controlled by the irradiation time and is less than the irradiation time that would convert all photoinitiator to initiating species such that the density of the three-dimensional photonic crystal template differs for different irradiation times. A deposition of reflecting or absorbing particles can be patterned on the surface of the photoresist composition to form a template with varying densities above different areas of the substrate.Type: GrantFiled: August 5, 2021Date of Patent: February 27, 2024Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of IllinoisInventors: Shailesh N. Joshi, Gaurav Singhal, Paul Vannest Braun, Danny J. Lohan, Kai-Wei Lan
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Patent number: 11884240Abstract: A system for using an electrostatic force to cause an object to adhere to a surface of a vehicle can include an electrode and a device. The electrode can be configured to be disposed within a structure of the vehicle. The structure can define the surface. A shape of the electrode can define a shape of a region of the surface. The device can be configured to connect the electrode to a voltage source so that, at a time at which the electrode is connected to the voltage source, an electric charge is produced on the electrode to produce the electrostatic force capable of causing the object to adhere to the surface. For example, the surface can include a dashboard, a dashboard vent frame, a sunglasses holder cover, or the like. For example, the object can include a mobile device, a cup, a pair of sunglasses, or the like.Type: GrantFiled: March 16, 2021Date of Patent: January 30, 2024Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Ryohei Tsuruta, Shailesh N. Joshi, Umesh N. Gandhi
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Patent number: 11879686Abstract: A cooling system that includes an expandable vapor chamber having a condenser side opposite an evaporator side, a condenser side wick coupled to a condenser side wall, an evaporator side wick coupled to an evaporator side wall, and a vapor core positioned between the evaporator side wick and the condenser side wick. The cooling system also includes a vapor pressure sensor communicatively coupled to a controller and a bellow actuator disposed in the vapor core and communicatively coupled to the controller. The bellow actuator is expandable based on a vapor pressure measurement of the vapor pressure sensor.Type: GrantFiled: July 8, 2022Date of Patent: January 23, 2024Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., PURDUE RESEARCH FOUNDATIONInventors: Shailesh N. Joshi, Srivathsan Sudhakar
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Patent number: 11828498Abstract: Embodiments described herein generally relate a multi-mode heat transfer system. The heat transfer system includes an emitter device. The emitter device includes an inner core, a composite material pattern, and a surface coating pattern. The inner core is surrounded by an outer core having a thickness and an outer surface. The composite material pattern extends through at least a portion of the outer surface and at least a portion of the thickness of the outer core and is thermally coupled to the inner core. The surface coating pattern is on the outer surface and is changeable between a low emissivity state and a high emissivity state based on a surface temperature of the emitter device. In the low emissivity state, the emitter device transmits an omni-directional radiation and, in the high emissivity state, the emitter device transmits a focused radiation via the composite material pattern.Type: GrantFiled: July 16, 2021Date of Patent: November 28, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Shailesh N. Joshi, Ercan M. Dede
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Patent number: 11815822Abstract: A component with a reflective substrate, a photoresist layer disposed on the reflective substrate, and a light diffusing layer sandwiched between the reflective substrate and the photoresist layer is provided. The light diffusing layer includes an outer metal oxide layer with an outer rough surface configured to diffuse laser light during laser interference lithography of the photoresist layer. The outer metal oxide is also configured to be reduced to a conductive metallic layer during electroplating of the substrate. The outer metal oxide layer includes a plurality of elongated light diffusing elements extending in an outward direction from the substrate such that the outer rough surface diffuses at least 90% of laser light during the laser interference lithography of the photoresist layer.Type: GrantFiled: March 25, 2022Date of Patent: November 14, 2023Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of IllinoisInventors: Shailesh N. Joshi, Gaurav Singhal, Paul Vannest Braun, Kai-Wei Lan, Nenad Miljkovic
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Patent number: 11802739Abstract: A cooling assembly includes a housing defining a fluid chamber, wick structures arranged on an interior surface of the fluid chamber such that one or more flow channels are present therebetween, and a divider. The divider includes an outer frame comprising a first side and a second side and one or more bridging supports extending between and connecting the first side and the second side of the outer frame. The one or more bridging supports are aligned with the one or more flow channels between the wick structures. Each one of the one or more bridging supports define a plurality of vapor flow paths extending therethrough. The one or more bridging supports further define a plurality of vapor spaces between the one or more bridging supports that are aligned with the wick structures. The plurality of vapor flow paths are fluidly coupled to the vapor spaces.Type: GrantFiled: September 1, 2020Date of Patent: October 31, 2023Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Feng Zhou, Danny J. Lohan, Shailesh N. Joshi, Hitoshi Fujioka, Shohei Nagai, Hiroshi Ukegawa
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Publication number: 20230312123Abstract: An auxiliary fan based hybrid cooling system of an electric machine is contemplated. The hybrid cooling system comprises a propeller positioned on an exterior portion of an enclosure and mechanically coupled to a rotor, at least one electronic component, a stator, the rotor, and an auxiliary fan disposed within the enclosure, and wherein: in a single cooling mode, the propeller rotates to generate air that is channeled into the enclosure, in a dual cooling mode: the propeller rotates to generate the air that is channeled into the enclosure, a coupling mechanism simultaneously engages the rotor and the auxiliary fan and links the propeller to the auxiliary fan by the engaging of the rotor with the auxiliary fan, and the auxiliary fan, rotates responsive to the rotation of the propeller in the dual cooling mode.Type: ApplicationFiled: March 30, 2022Publication date: October 5, 2023Applicant: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.Inventors: Shailesh N. Joshi, Hiroshi Ukegawa
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Publication number: 20230318356Abstract: An aerial vehicle is provided. The aerial vehicle may include a battery, a receiver for wirelessly receiving power to charge the battery, a vehicle magnetic levitation module providing a repelling force between the aerial vehicle and a charging station, and a controller controlling the vehicle magnetic levitation module to adjust a level of the repelling force based on at least one of parameters indicative of charging efficiency.Type: ApplicationFiled: March 31, 2022Publication date: October 5, 2023Applicant: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.Inventors: Yanghe Liu, Shailesh N. Joshi, Hiroshi Ukegawa