Patents by Inventor Fabio Semperlotti
Fabio Semperlotti 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: 20240003403Abstract: The vibration attenuation system includes a load bearing layer, a non-load bearing layer, and a rigid beam connector. The load bearing layer has a first density and a first stiffness. The non-load bearing layer has a second density and a second stiffness. The second density is lower than the first density. The rigid beam connector has a third density and a third stiffness. The rigid beam connector couples the load bearing layer to the non-load bearing layer. The coupling of the non-load bearing layer to the load bearing layer is enabled through the use of the rigid beam connector which provides a nonlocal connection to transfer energy from the load bearing layer to the non-load bearing layer.Type: ApplicationFiled: July 1, 2023Publication date: January 4, 2024Inventors: Fabio Semperlotti, Mehdi Jokar, Siddharth Nair
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Patent number: 11813642Abstract: A system includes a first structure, wherein the first structure lacks space inversion symmetry, and wherein the first structure includes a first elastic lattice. The system further includes a second structure, wherein the second structure lacks space inversion symmetry, and wherein the second structure includes a second elastic lattice. Additionally, the system includes the first structure coupled to the second structure such that the first structure and the second structure have a mirror symmetry to each other.Type: GrantFiled: July 26, 2018Date of Patent: November 14, 2023Assignee: Purdue Research FoundationInventors: Fabio Semperlotti, Ting-Wei Liu
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Patent number: 11514878Abstract: A method of using an acoustic resonator including receiving at a first stage of a resonator an incoming acoustic wave. The method further includes resonating the incoming wave with a flexible membrane, a taper of the flexible membrane, and a cavity of a first stage, thereby producing synergistic effect on a resulting acoustic resonance. Additionally, the method includes transforming an acoustic energy associated with the incoming acoustic wave into an elastic energy, wherein the elastic energy is channeled through the flexible membrane, thereby reducing an intensity of the incoming acoustic wave and resulting in a first reduced incoming acoustic wave. Further the method includes transferring the first reduced incoming acoustic wave through a hole of a neck of the flexible membrane. The method also includes transferring a first pressure wave caused by a perturbation in the flexible membrane into a second stage, thereby producing a second acoustic wave.Type: GrantFiled: February 25, 2019Date of Patent: November 29, 2022Assignee: Purdue Research FoundationInventors: Fabio Semperlotti, Mehdi Jokar
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Publication number: 20220345829Abstract: A thermoacoustic device includes a stage coupled to a bar, wherein the stage includes a first heating component on a first terminus of the stage. The stage further includes a first cooling component on a second terminus of the stage. A thermal conductivity of the stage is higher than a thermal conductivity of the bar. A heat capacity of the stage is higher than a heat capacity of the bar.Type: ApplicationFiled: June 28, 2022Publication date: October 27, 2022Applicants: Purdue Research Foundation, University of Notre Dame du LacInventors: Fabio Semperlotti, Haitian Hao, Carlo Scalo, Mihir Sen
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Patent number: 11375320Abstract: A thermoacoustic device includes a stage coupled to a bar, wherein the stage includes a first heating component on a first terminus of the stage. The stage further includes a first cooling component on a second terminus of the stage. A thermal conductivity of the stage is higher than a thermal conductivity of the bar. A heat capacity of the stage is higher than a heat capacity of the bar.Type: GrantFiled: August 30, 2019Date of Patent: June 28, 2022Assignees: Purdue Research Foundation, Notre Dame Du LacInventors: Fabio Semperlotti, Haitian Hao, Carlo Scalo, Mihir Sen
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Patent number: 11339845Abstract: An acoustic shield for protecting a vibrational sensitive device includes a first unit cell and a second unit cell. The first unit cell includes a first locally resonant unit. The first locally resonant unit controls a first phase gradient and the first unit cell includes a first surface. The second unit cell includes a second surface proximate to the first surface. The second unit cell includes a second locally resonant unit embedded along the second interface. The second locally resonant unit controls a second phase gradient. The first phase gradient is different from the second phase gradient. The first unit cell and the second unit cell comprise a super cell. The acoustic shield is configured such that a vibrational wave from a first side of the super cell to a second side of the super cell is substantially attenuated.Type: GrantFiled: May 15, 2019Date of Patent: May 24, 2022Assignees: National Technology & Engineering Solutions of Sandia, LLC, Purdue Research FoundationInventors: Timothy Walsh, Fabio Semperlotti, Hongfei Zhu
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Publication number: 20200092660Abstract: A thermoacoustic device includes a stage coupled to a bar, wherein the stage includes a first heating component on a first terminus of the stage. The stage further includes a first cooling component on a second terminus of the stage. A thermal conductivity of the stage is higher than a thermal conductivity of the bar. A heat capacity of the stage is higher than a heat capacity of the bar.Type: ApplicationFiled: August 30, 2019Publication date: March 19, 2020Applicant: Purdue Research FoundationInventors: Fabio Semperlotti, Haitian Hao, Carlo Scalo, Mihir Sen
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Publication number: 20190266990Abstract: A method of using an acoustic resonator including receiving at a first stage of a resonator an incoming acoustic wave. The method further includes resonating the incoming wave with a flexible membrane, a taper of the flexible membrane, and a cavity of a first stage, thereby producing synergistic effect on a resulting acoustic resonance. Additionally, the method includes transforming an acoustic energy associated with the incoming acoustic wave into an elastic energy, wherein the elastic energy is channeled through the flexible membrane, thereby reducing an intensity of the incoming acoustic wave and resulting in a first reduced incoming acoustic wave. Further the method includes transferring the first reduced incoming acoustic wave through a hole of a neck of the flexible membrane. The method also includes transferring a first pressure wave caused by a perturbation in the flexible membrane into a second stage, thereby producing a second acoustic wave.Type: ApplicationFiled: February 25, 2019Publication date: August 29, 2019Applicant: Purdue Research FoundationInventors: Fabio Semperlotti, Mehdi Jokar
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Publication number: 20190039093Abstract: A system includes a first structure, wherein the first structure lacks space inversion symmetry, and wherein the first structure includes a first elastic lattice. The system further includes a second structure, wherein the second structure lacks space inversion symmetry, and wherein the second structure includes a second elastic lattice. Additionally, the system includes the first structure coupled to the second structure such that the first structure and the second structure have a mirror symmetry to each other.Type: ApplicationFiled: July 26, 2018Publication date: February 7, 2019Applicant: Purdue Research FoundationInventors: Fabio Semperlotti, Ting-Wei Liu
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Patent number: 9936763Abstract: A wearable, portable, self-contained refrigeration/cooling garment may effectively convert the energy of human movement into heat flux. The heat flux can then used to actively control the temperature of the human body or of part of it. In one example of the present disclosure, the garment is a type of footwear powered by the wearer's ambulation.Type: GrantFiled: June 1, 2015Date of Patent: April 10, 2018Assignee: University of Notre Dame du LacInventors: Fabio Semperlotti, Mihir Sen
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Patent number: 9437183Abstract: An embedded acoustic metamaterial lenses allows for ultrasonic beam-forming and high resolution identification of acoustic sources for structural health monitoring. The lenses design provides an alternative to conventional phased-array technology enabling the formation of steerable and collimated (or focused) ultrasonic beams by exploiting a single transducer. The ultrasonic beam can be steered by simply tuning the frequency of the excitation. Also, the embedded lens can be designed to achieve sub-wavelength resolution to clustered acoustic sources which is a typical scenario encountered in incipient structural damage.Type: GrantFiled: December 19, 2014Date of Patent: September 6, 2016Assignee: University of Notre Dame du LacInventors: Fabio Semperlotti, Hongfei Zhu
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Publication number: 20150335096Abstract: A wearable, portable, self-contained refrigeration/cooling garment may effectively convert the energy of human movement into heat flux. The heat flux can then used to actively control the temperature of the human body or of part of it. In one example of the present disclosure, the garment is a type of footwear powered by the wearer's ambulation.Type: ApplicationFiled: June 1, 2015Publication date: November 26, 2015Inventors: Fabio Semperlotti, Mihir Sen
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Publication number: 20150228269Abstract: An embedded acoustic metamaterial lenses allows for ultrasonic beam-forming and high resolution identification of acoustic sources for structural health monitoring. The lenses design provides an alternative to conventional phased-array technology enabling the formation of steerable and collimated (or focused) ultrasonic beams by exploiting a single transducer. The ultrasonic beam can be steered by simply tuning the frequency of the excitation. Also, the embedded lens can be designed to achieve sub-wavelength resolution to clustered acoustic sources which is a typical scenario encountered in incipient structural damage.Type: ApplicationFiled: December 19, 2014Publication date: August 13, 2015Inventors: Fabio Semperlotti, Hongfei Zhu
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Publication number: 20150173452Abstract: A wearable, portable, self-contained refrigeration/cooling garment may effectively convert the energy of human movement into heat flux. The heat flux can then used to actively control the temperature of the human body or of part of it. In one example of the present disclosure, the garment is a type of footwear powered by the wearer's ambulation.Type: ApplicationFiled: December 17, 2014Publication date: June 25, 2015Inventors: Fabio Semperlotti, Mihir Sen