Patents by Inventor Cheruvari Karthik Hari Dharan
Cheruvari Karthik Hari Dharan 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: 11873801Abstract: The flywheel device includes a sealed housing section; a rotor located in the sealed housing section where the rotor is held in a vertical position by a magnetic system; a controller coupled to the magnetic system; and a braking annular ring mounted to the sealed housing section below the rotor, where the rotor contacts the braking annular ring when the rotor is lowered or otherwise dropped from the vertical position. The controller performs operations to provide control signals to provide first power to the magnetic system to hold the rotor in the vertical position and provide second control signals to provide second power to the magnetic system to lower the rotor.Type: GrantFiled: September 2, 2020Date of Patent: January 16, 2024Assignee: Hari Dharan, LLCInventor: Cheruvari Karthik Hari Dharan
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Patent number: 11283328Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: GrantFiled: March 9, 2020Date of Patent: March 22, 2022Assignee: Saint-Augustin Canada Electric Inc.Inventor: Cheruvari Karthik Hari Dharan
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Publication number: 20210088031Abstract: The flywheel device includes a sealed housing section; a rotor located in the sealed housing section where the rotor is held in a vertical position by a magnetic system; a controller coupled to the magnetic system; and a braking annular ring mounted to the sealed housing section below the rotor, where the rotor contacts the braking annular ring when the rotor is lowered or otherwise dropped from the vertical position. The controller perform operations to provide control signals to provide first power to the magnetic system to hold the rotor in the vertical position and provide second control signals to provide second power to the magnetic system to lower the rotor.Type: ApplicationFiled: September 2, 2020Publication date: March 25, 2021Applicant: Hari Dharan, LLCInventor: Cheruvari Karthik Hari Dharan
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Patent number: 10848031Abstract: A flywheel energy storage system comprises a rotor having a rotational axis about which the rotor spins in operation and comprising a ferrous material and a housing enclosing the rotor and having an interior subject to a vacuum. The system further comprises a vacuum pump configured to provide the vacuum of the interior of the housing, an electromagnet configured to apply a magnetic field and lift the rotor vertically along the rotational axis of the rotor, and at least one bearing provided between the rotor and the housing, and a controller in operative communication with the electromagnet and the vacuum pump. The rotor applies a force against the at least one bearing.Type: GrantFiled: November 30, 2017Date of Patent: November 24, 2020Assignee: Saint-Augustin Canada Electric Inc.Inventors: Phil Alei, Preston Brendel, Cheruvari Karthik Hari Dharan, Henry Godman, Mike Kitchen, Eric Martinez, Hung Nguyen, Khang Nguyen, Tien Nguyen, Ton Nguyen, Jeffrey Nguyen, Matt Paiz, E-Fann Suang, Danny Schmitz, Siyuan Xin
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Publication number: 20200212762Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: ApplicationFiled: March 9, 2020Publication date: July 2, 2020Inventor: Cheruvari Karthik Hari Dharan
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Patent number: 10587165Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: GrantFiled: October 31, 2017Date of Patent: March 10, 2020Assignee: Saint-Augustin Canada Electric Inc.Inventor: Cheruvari Karthik Hari Dharan
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Publication number: 20180152076Abstract: A flywheel energy storage system comprises a rotor having a rotational axis about which the rotor spins in operation and comprising a ferrous material and a housing enclosing the rotor and having an interior subject to a vacuum. The system further comprises a vacuum pump configured to provide the vacuum of the interior of the housing, an electromagnet configured to apply a magnetic field and lift the rotor vertically along the rotational axis of the rotor, and at least one bearing provided between the rotor and the housing, and a controller in operative communication with the electromagnet and the vacuum pump. The rotor applies a force against the at least one bearing.Type: ApplicationFiled: November 30, 2017Publication date: May 31, 2018Inventors: Phil Alei, Preston Brendel, Cheruvari Karthik Hari Dharan, Henry Godman, Mike Kitchen, Eric Martinez, Hung Nguyen, Khang Nguyen, Tien Nguyen, Ton Nguyen, Jeffrey Nguyen, Matt Paiz, E-Fann Suang, Danny Schmitz, Siyuan Xin
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Publication number: 20180069453Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: ApplicationFiled: October 31, 2017Publication date: March 8, 2018Inventor: Cheruvari Karthik Hari Dharan
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Patent number: 9899895Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: GrantFiled: July 2, 2014Date of Patent: February 20, 2018Assignee: Saint Augustin Canada Electric Inc.Inventor: Cheruvari Karthik Hari Dharan
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Patent number: 9735645Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: GrantFiled: July 2, 2014Date of Patent: August 15, 2017Assignee: Saint Augustin Canada Electric Inc.Inventor: Cheruvari Karthik Hari Dharan
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Patent number: 9136741Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: GrantFiled: July 2, 2014Date of Patent: September 15, 2015Assignee: QUANTUM ENERGY STORAGE CORPORATIONInventor: Cheruvari Karthik Hari Dharan
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Publication number: 20150013148Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: ApplicationFiled: July 2, 2014Publication date: January 15, 2015Inventor: Cheruvari Karthik Hari Dharan
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Publication number: 20150008778Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: ApplicationFiled: July 2, 2014Publication date: January 8, 2015Inventor: Cheruvari Karthik Hari Dharan
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Publication number: 20150007686Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.Type: ApplicationFiled: July 2, 2014Publication date: January 8, 2015Inventor: Cheruvari Karthik Hari Dharan
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Publication number: 20120060961Abstract: A high temperature industrial plant metal alloy tube for use in high temperature industrial plant such as a reformer tube having lower creep comprises around the tube one or more layers of reinforcement material for example wire or mesh of a refractory material. A method of producing the tube and plant comprising the tube are also claimed.Type: ApplicationFiled: March 3, 2010Publication date: March 15, 2012Inventors: Milo Van Landingham Kral, Cheruvari Karthik Hari Dharan
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Publication number: 20100116180Abstract: A composite structural material suitable, for example, as a replacement for wooden boards, is disclosed. It comprises a dimensionally stable core material ensheathed in a dimensionally stable, laminar covering that is adherent to the core material. The laminar covering is comprised of at least one layer of parallel cords (19) bonded to at least one layer of a rigidified web material (10) selected from the group consisting of paper and cloth. Suitable core materials include polyurethane foam (38), optionally filled with particles (32) of granulated rubber, expanded perlite, expandable polymer beads, and/or glass microspheres. The parallel cords (19) preferably are supplied in the form of a strip of polyester cloth, as the warp cords thereof. The web material (10) preferably is kraft paper that is rigidified with an epoxy resin.Type: ApplicationFiled: November 12, 2009Publication date: May 13, 2010Applicant: CODA CAPITAL MANAGEMENT GROUP, LLCInventors: Arthur J. Roth, Patrick H. Winters, Michael H. Clement, Cheruvari Karthik Hari Dharan