Patents by Inventor Saivimal Sridar
Saivimal Sridar 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: 11337879Abstract: An orthosis for increasing a range of motion of an ankle is disclosed. In various embodiments, the orthosis includes a frame including a ball shell and a heel shell; a first actuator disposed on the ball shell and configured to apply a first force against a ball region of a foot, resulting in a moment being applied at the ankle; and a first rod connecting the heel shell and the ball shell, the first rod being slidably connected to at least one of the heel shell or the ball shell. In various embodiments, a second actuator is disposed on the heel shell and configured to apply a second force against a heel region of the foot. In various embodiments, a calf shell is configured to support a calf region of a leg that is connected to the ankle.Type: GrantFiled: April 23, 2020Date of Patent: May 24, 2022Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Benjamin Shuch, Chaitanya Kulkarni, Sudhanshu Katarey, Harshit Dangaich, Saivimal Sridar, Pham Huy Nguyen, Thomas Sugar
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Patent number: 11325163Abstract: Systems and methods for sorting utilizing an inflatable actuator are disclosed. A sorting system utilizing an inflatable actuator includes an inflatable actuator. The inflatable actuator is disposed in a cantilever beam orientation atop a support surface. The system includes an inflation component coupled to the inflatable actuator to provide an inflation force. Additionally, the system includes a control component configured to send an activation signal to the inflation component responsive to a detection of an object to be sorted. Responsive to the activation signal, the inflation component inflates the inflatable actuator to cause the inflatable actuator to make contact with the object to be sorted. The contact of the inflatable actuator with the object to be sorted causes the object to change from a first trajectory to a second trajectory.Type: GrantFiled: September 23, 2019Date of Patent: May 10, 2022Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Panagiotis Polygerinos, Saivimal Sridar, Pham Huy Nguyen
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Patent number: 11259980Abstract: A soft-inflatable exosuit for knee rehabilitation is fabricated in two different beam-like structures (I and O cross-section actuators) and mechanically characterized for their torque performance in knee-extension assistance. The fabrication procedure of both types of actuators is presented as well as their integration into a light-weight, low-cost and body-conforming interface. To detect the activation duration of the device during the gait cycle, a soft-silicone insole with embedded force-sensitive resistors (FSRs) is used. In evaluation studies, the soft inflatable exosuit device is tested for its ability to reduce muscle activity during the swing phase of the knee. Using sEMG (surface electromyography) sensors, the rectus femoris muscle group of a healthy individual is recorded while walking on a treadmill at a constant speed, with and without the soft device.Type: GrantFiled: July 31, 2018Date of Patent: March 1, 2022Assignees: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY, DIGNITY HEALTHInventors: Panagiotis Polygerinos, Saivimal Sridar, Trent Maruyama, Christopher St. Clair, Christina Kwasnica
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Publication number: 20210322252Abstract: Systems and methods for a wearable exoskeleton include an inflatable actuator with a reduced operation volume for faster operation. The inflatable actuator may include a first paddle connectable to the human body, a second paddle connectable to the human body, and an inflatable fabric coupled between the first paddle and the second paddle. In response to the inflatable fabric being filled with compressed air, the rigidity of the inflatable fabric increases, causing the angle between the first paddle and the second paddle to change to provide an assistive force for a movement of the human body. A portable pneumatic source is provided for quickly supplying a compressed air to the inflatable actuator. The portable pneumatic source may include a double acting piston and a cylinder defining a first chamber and a second chamber, and a valve assembly, for compressing air at both the upstroke and downstroke of the piston.Type: ApplicationFiled: April 13, 2021Publication date: October 21, 2021Inventors: Saivimal Sridar, Souvik Poddar, Wenlong Zhang
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Patent number: 10952888Abstract: Variable stiffness devices and methods of their use are provided. In some embodiments, a variable stiffness device comprises an inner member defining a compartment for receiving an actuating fluid; an outer member disposed around the inner member; and a granular medium disposed between the inner member and the outer member; wherein the inner member is being moveable in a radial direction from a relaxed state to an expanded state by introducing the actuating fluid into the compartment of the inner member to compress the granular medium against the outer member to increase the stiffness of the device.Type: GrantFiled: June 21, 2018Date of Patent: March 23, 2021Assignee: Worcester Polytechnic InstituteInventors: Marko Popovic, Saivimal Sridar, Corey Majeika, Nicholas Deisadze, Erika Giancarlo
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Publication number: 20200337937Abstract: A soft wearable medical device may comprise a soft compliant pumpactuator or actuators at least partially disposed in a glove assembly. Responsive to a detection of a tremor, such as an ataxia tremor, an actuator at least partially inflates to provide a stabilizing counterforce and reduce or eliminate the tremor.Type: ApplicationFiled: April 27, 2020Publication date: October 29, 2020Inventors: Thomas Sugar, Yugesh Kumar Gajendran, Joseph McMillan, Hansol Moon, Joshua Pace, Saivimal Sridar, Pham Huy Nguyen, Jeremy Palmiscno, Kristin Palmiscno, Steven Frey, Will Meredith
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Publication number: 20200337931Abstract: An orthosis for increasing a range of motion of an ankle is disclosed. In various embodiments, the orthosis includes a frame including a ball shell and a heel shell; a first actuator disposed on the ball shell and configured to apply a first force against a ball region of a foot, resulting in a moment being applied at the ankle; and a first rod connecting the heel shell and the ball shell, the first rod being slidably connected to at least one of the heel shell or the ball shell. In various embodiments, a second actuator is disposed on the heel shell and configured to apply a second force against a heel region of the foot. In various embodiments, a calf shell is configured to support a calf region of a leg that is connected to the ankle.Type: ApplicationFiled: April 23, 2020Publication date: October 29, 2020Inventors: Benjamin Shuch, Chaitanya Kulkarni, Sudhanshu Katarey, Harshit Dangaich, Saivimal Sridar, Pham Huy Nguyen, Thomas Sugar
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Publication number: 20200337933Abstract: A soft wearable medical device may comprise a force actuation system at least partially disposed in a glove assembly. The force actuation system may be a passive or active actuation system. The force actuation system may be configured to adjust a grip of a patient during use of the soft wearable medical device. The soft wearable medical device may further comprise a force indication system including a plurality of force sensors and a light array, each force sensor disposed in a finger of the glove assembly and the light array mounted to the glove assembly.Type: ApplicationFiled: April 24, 2020Publication date: October 29, 2020Inventors: Thomas Sugar, Luis Lopez, Lee Griffith, Robin Parmentier, Saivimal Sridar, Pham Huy Nguyen, Jeremy Palmiscno, Will Meredith
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Publication number: 20200337597Abstract: Disclosed herein are various embodiments of a soft robotic device for assisting hemiparetic patients. In embodiments, the soft robotic device includes an inflatable actuator capable of assisting hemiparetic patients with their gait cycle via application of a force on the gluteus muscle.Type: ApplicationFiled: April 27, 2020Publication date: October 29, 2020Inventors: Thomas Sugar, Abhishu Patel, Ryan Borneman, Omik Save, Yashaswy Govada, Saivimal Sridar, Pham Huy Nguyen, Ammon Lovell
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Patent number: 10632626Abstract: The present disclosure provides a biologically-inspired robotic device comprising: a first member; a second member pivotably connected to the first member; one or more actuators; and a coupler/decoupler mechanism (CDC) selectively coupling or decoupling of the one or more actuators to the second member, such that, when the one or more actuators are coupled to the second member, the one or more actuators act to pivot the second member relative to the first member.Type: GrantFiled: June 7, 2017Date of Patent: April 28, 2020Assignee: Worcester Polytechnic InstituteInventors: Marko B. Popovic, Matthew Paul Bowers, Thane Robert Hunt, Lynn Robert Koesterman, Michael Pickett, Richard Matthew Rafferty, Saivimal Sridar, Seiichiro Ueda, Varun Visnudas Verlencar, Amaid Zia, Ananth Jonnavittula
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Publication number: 20200094290Abstract: Systems and methods for sorting utilizing an inflatable actuator are disclosed. A sorting system utilizing an inflatable actuator includes an inflatable actuator. The inflatable actuator is disposed in a cantilever beam orientation atop a support surface. The system includes an inflation component coupled to the inflatable actuator to provide an inflation force. Additionally, the system includes a control component configured to send an activation signal to the inflation component responsive to a detection of an object to be sorted. Responsive to the activation signal, the inflation component inflates the inflatable actuator to cause the inflatable actuator to make contact with the object to be sorted. The contact of the inflatable actuator with the object to be sorted causes the object to change from a first trajectory to a second trajectory.Type: ApplicationFiled: September 23, 2019Publication date: March 26, 2020Inventors: Panagiotis Polygerinos, Saivimal Sridar, Pham Huy Nguyen, Wenlong Zhang
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Publication number: 20190029914Abstract: A soft-inflatable exosuit for knee rehabilitation is fabricated in two different beam-like structures (I and O cross-section actuators) and mechanically characterized for their torque performance in knee-extension assistance. The fabrication procedure of both types of actuators is presented as well as their integration into a light-weight, low-cost and body-conforming interface. To detect the activation duration of the device during the gait cycle, a soft-silicone insole with embedded force-sensitive resistors (FSRs) is used. In evaluation studies, the soft inflatable exosuit device is tested for its ability to reduce muscle activity during the swing phase of the knee. Using sEMG (surface electromyography) sensors, the rectus femoris muscle group of a healthy individual is recorded while walking on a treadmill at a constant speed, with and without the soft device.Type: ApplicationFiled: July 31, 2018Publication date: January 31, 2019Inventors: Panagiotis Polygerinos, Saivimal Sridar, Trent Maruyama, Christopher St. Clair, Christina Kwasnica
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Publication number: 20180296382Abstract: Variable stiffness devices and methods of their use are provided. In some embodiments, a variable stiffness device comprises an inner member defining a compartment for receiving an actuating fluid; an outer member disposed around the inner member; and a granular medium disposed between the inner member and the outer member; wherein the inner member is being moveable in a radial direction from a relaxed state to an expanded state by introducing the actuating fluid into the compartment of the inner member to compress the granular medium against the outer member to increase the stiffness of the device.Type: ApplicationFiled: June 21, 2018Publication date: October 18, 2018Inventors: Marko Popovic, Saivimal Sridar, Corey Majeika, Nicholas Deisadze, Erika Giancarlo
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Patent number: 10028855Abstract: Variable stiffness devices and methods of their use are provided. In some embodiments, a variable stiffness device comprises an inner member defining a compartment for receiving an actuating fluid; an outer member disposed around the inner member; and a granular medium disposed between the inner member and the outer member; wherein the inner member is being moveable in a radial direction from a relaxed state to an expanded state by introducing the actuating fluid into the compartment of the inner member to compress the granular medium against the outer member to increase the stiffness of the device.Type: GrantFiled: May 13, 2016Date of Patent: July 24, 2018Assignee: Worcester Polytechnic InstituteInventors: Marko Popovic, Saivimal Sridar, Corey Majeika, Nicholas Deisadze, Erika Giancarlo
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Publication number: 20170368696Abstract: The present disclosure provides a biologically-inspired robotic device comprising: a first member; a second member pivotably connected to the first member; one or more actuators; and a coupler/decoupler mechanism (CDC) selectively coupling or decoupling of the one or more actuators to the second member, such that, when the one or more actuators are coupled to the second member, the one or more actuators act to pivot the second member relative to the first member.Type: ApplicationFiled: June 7, 2017Publication date: December 28, 2017Inventors: Marko B. Popovic, Matthew Paul Bowers, Thane Robert Hunt, Lynn Robert Koesterman, Michael Pickett, Richard Matthew Rafferty, Saivimal Sridar, Seiichiro Ueda, Varun Visnudas Verlencar, Amaid Zia, Ananth Jonnavittula
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Publication number: 20160331572Abstract: Variable stiffness devices and methods of their use are provided. In some embodiments, a variable stiffness device comprises an inner member defining a compartment for receiving an actuating fluid; an outer member disposed around the inner member; and a granular medium disposed between the inner member and the outer member; wherein the inner member is being moveable in a radial direction from a relaxed state to an expanded state by introducing the actuating fluid into the compartment of the inner member to compress the granular medium against the outer member to increase the stiffness of the device.Type: ApplicationFiled: May 13, 2016Publication date: November 17, 2016Inventors: Marko Popovic, Saivimal Sridar, Corey Majeika, Nicholas Deisadze, Erika Giancarlo