Patents by Inventor Alexander Apostolos Alexandridis
Alexander Apostolos Alexandridis 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: 11235635Abstract: An active suspension system is configured in a strut arrangement. The active suspension system comprises a hydraulic actuator and a hydraulic pump/electric motor assembly, wherein the actuator movement is preferably in lockstep with the hydraulic motor-pump and electric motor-generator combination. Torque in the electric motor is instantaneously controlled by a controller to create an immediate force change on the hydraulic actuator. The hydraulic actuator is configured so that it can be used as a strut whereby the actuator has sufficient structural rigidity to carry the applied suspension loads while capable of supplying damper forces in at least three quadrants of the force velocity graph of the suspension actuator operation. Embodiments disclosed include low cost active suspension systems for a MacPherson strut application.Type: GrantFiled: October 1, 2019Date of Patent: February 1, 2022Assignee: ClearMotion, Inc.Inventors: Clive Tucker, Zackary Martin Anderson, David Michael Lewis, Ross J. Wendell, Alexander Apostolos Alexandridis
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Publication number: 20200198433Abstract: An active suspension system is configured in a strut arrangement. The active suspension system comprises a hydraulic actuator and a hydraulic pump/electric motor assembly, wherein the actuator movement is preferably in lockstep with the hydraulic motor-pump and electric motor-generator combination. Torque in the electric motor is instantaneously controlled by a controller to create an immediate force change on the hydraulic actuator. The hydraulic actuator is configured so that it can be used as a strut whereby the actuator has sufficient structural rigidity to carry the applied suspension loads while capable of supplying damper forces in at least three quadrants of the force velocity graph of the suspension actuator operation. Embodiments disclosed include low cost active suspension systems for a MacPherson strut application.Type: ApplicationFiled: October 1, 2019Publication date: June 25, 2020Applicant: ClearMotion, Inc.Inventors: Clive Tucker, Zackary Martin Anderson, David Michael Lewis, Ross J, Wendell, Alexander Apostolos Alexandridis
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Patent number: 10471798Abstract: An active suspension system is configured in a strut arrangement. The active suspension system comprises a hydraulic actuator and a hydraulic pump/electric motor assembly, wherein the actuator movement is preferably in lockstep with the hydraulic motor-pump and electric motor-generator combination. Torque in the electric motor is instantaneously controlled by a controller to create an immediate force change on the hydraulic actuator. The hydraulic actuator is configured so that it can be used as a strut whereby the actuator has sufficient structural rigidity to carry the applied suspension loads while capable of supplying damper forces in at least three quadrants of the force velocity graph of the suspension actuator operation. Embodiments disclosed include low cost active suspension systems for a MacPherson strut application.Type: GrantFiled: November 30, 2017Date of Patent: November 12, 2019Assignee: ClearMotion, Inc.Inventors: Clive Tucker, Zackary Martin Anderson, David Michael Lewis, Ross J. Wendell, Alexander Apostolos Alexandridis
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Publication number: 20180178612Abstract: An active suspension system is configured in a strut arrangement. The active suspension system comprises a hydraulic actuator and a hydraulic pump/electric motor assembly, wherein the actuator movement is preferably in lockstep with the hydraulic motor-pump and electric motor-generator combination. Torque in the electric motor is instantaneously controlled by a controller to create an immediate force change on the hydraulic actuator. The hydraulic actuator is configured so that it can be used as a strut whereby the actuator has sufficient structural rigidity to carry the applied suspension loads while capable of supplying damper forces in at least three quadrants of the force velocity graph of the suspension actuator operation. Embodiments disclosed include low cost active suspension systems for a MacPherson strut application.Type: ApplicationFiled: November 30, 2017Publication date: June 28, 2018Applicant: ClearMotion, Inc.Inventors: Clive Tucker, Zackary Martin Anderson, David Michael Lewis, Ross J. Wendell, Alexander Apostolos Alexandridis
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Patent number: 9855814Abstract: An active suspension system is configured in a strut arrangement. The active suspension system comprises a hydraulic actuator and a hydraulic pump/electric motor assembly, wherein the actuator movement is preferably in lockstep with the hydraulic motor-pump and electric motor-generator combination. Torque in the electric motor is instantaneously controlled by a controller to create an immediate force change on the hydraulic actuator. The hydraulic actuator is configured so that it can be used as a strut whereby the actuator has sufficient structural rigidity to carry the applied suspension loads while capable of supplying damper forces in at least three quadrants of the force velocity graph of the suspension actuator operation. Embodiments disclosed include low cost active suspension systems for a MacPherson strut application.Type: GrantFiled: April 23, 2014Date of Patent: January 2, 2018Assignee: ClearMotion, Inc.Inventors: Clive Tucker, Zackary Martin Anderson, David Michael Lewis, Ross J. Wendell, Alexander Apostolos Alexandridis
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Patent number: 6390252Abstract: An improved magnetorheological fluid damper is provided which more closely approximates ideal performance requirements including increased turn-up ratio and stiction free performance near zero velocity for realistic automotive applications. The MR damper includes a magnetic flux leakage reduction device positioned at each end of the magnetic damper piston assembly to create a magnetic flux isolation barrier causing magnetic flux to extend through an annular flow gap thereby minimizing flux leakage into other areas such as a piston rod and associated hollow tube. The magnetic flux leakage reduction devices are formed of a non-magnetic material and completely cover a respective adjacent axial face of a piston core. A laminar flow enhancing feature is also provided for enhancing laminar flow and minimizing turbulence in the annular flow gap thereby advantageously reducing the off-state force and increasing the turn-up ratio.Type: GrantFiled: September 16, 1999Date of Patent: May 21, 2002Assignee: Delphi Technologies, Inc.Inventors: Chandra Sekhar Namuduri, Alexander Apostolos Alexandridis
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Patent number: 6311810Abstract: A novel and improved magnetorheological fluid damper is provided which effectively secures a flux ring to a piston core in a manner which prevents relative axial and radial movement between the flux ring and the core throughout operation while minimizing the size of the piston assembly yet providing effective damping. Several connector devices are disclosed for both axially and radially securing the flux ring relative to the piston core at one end of the piston assembly in a simple manner without increasing the length of the piston assembly. The connector device may include an outer portion brazed to the flux ring, an inner portion connected to the piston core, bridge portions extending between the outer and inner portions, flow passages formed between the bridge portions and an inlet cavity formed adjacent an annular flow gap to permit unimpeded, enhanced laminar flow through the flow gap by improving the damping effect.Type: GrantFiled: October 21, 1999Date of Patent: November 6, 2001Assignee: Delphi Technologies, Inc.Inventors: Patrick Neil Hopkins, John David Fehring, Ilya Lisenker, Richard Edward Longhouse, William Charles Kruckemeyer, Michael Leslie Oliver, Frank M. Robinson, Alexander Apostolos Alexandridis
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Patent number: 6279701Abstract: An improved magnetorheological fluid damper is provided which closely approximates ideal performance requirements by providing an increased turn-up ratio and improving the linearity of damping force response. The MR damper includes a plurality of concentric annular flow gaps formed between concentrically mounted flux rings positioned on a piston core. By utilizing multiple flow gaps, the present damper increases the overall magnetorheological damping affect thereby creating a higher damping force and an increased tun-up ratio for a given piston size. Alternatively, the present multiple flow gap design permits a given damping force requirement to be achieved with a piston having a significantly reduced length thereby permitting a longer piston stroke. Also, multiple flow gaps permit greater design optimization for controlling damping force linearity.Type: GrantFiled: September 13, 1999Date of Patent: August 28, 2001Assignee: Delphi Technologies, Inc.Inventors: Chandra Sekhar Namuduri, Alexander Apostolos Alexandridis, Joseph Madak, David S. Rule