Patents by Inventor Yihao Zheng
Yihao Zheng 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: 11931055Abstract: An actuated telescoping system for navigation within a vascular lumen and thrombectomy of a thrombus. The system includes a tubular catheter member having an open distal end defining a catheter lumen, a vacuum source, a rotational drive system, a flexible shaft having a channel coupled to the rotational drive system for rotational movement in response thereto, and an optional guidewire selectively inserted at least partially within the flexible shaft. The flexible shaft is at least partially disposed within the tubular catheter member configured for uncoupled rotational and translational motion therein and to optionally define a corkscrew motion in response to rotational driving force by the drive system that results in formation of hydrodynamic vortices within the catheter lumen.Type: GrantFiled: December 2, 2021Date of Patent: March 19, 2024Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Luis Emilio Savastano, Jeffrey Stephen Plott, Yang Liu, Yihao Zheng, Albert Jau-Min Shih
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Publication number: 20230181177Abstract: Described are a micro punch cutting tool and associated method that can be used under a microscope to accurately excise a targeted piece of material on a micron or millimeter scale. An example device for targeted material excision from a tissue sample includes a support defining an opening and providing a region below the opening for positioning a tissue sample. A tissue stabilizer is receivable in the opening and defines a shape that complements a shape of the support. A cutting tool assembly receivable in the tissue stabilizer includes a hollow cutter having a bore and is movable relative to the tissue stabilizer to cause the cutter to excise material from the tissue sample when the tissue sample is positioned below the opening of the support. Movement of the cutting tool assembly is guided by a helical groove in the tissue stabilizer engaging a protrusion of the cutting tool assembly.Type: ApplicationFiled: December 13, 2022Publication date: June 15, 2023Inventors: David M. Harlan, Yihao Zheng, Sambra D. Redick, Katerina Angjeli, Sally C. Kent
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Publication number: 20230038790Abstract: The present disclosure relates to the technical field of vehicles, and provides a vehicle and an energy conversion device and a control method therefor. The energy conversion device includes a motor controller, a bus capacitor, a first switch module, a motor, and a second switch module. By controlling the first switch module and the second switch module to be turned on/off, a motor driving circuit can be formed by a battery pack, the first switch module, the bus capacitor, the motor controller, and the motor, and a charging and discharging circuit can be formed by the battery pack, the second switch module, the motor, the motor controller, and the bus capacitor.Type: ApplicationFiled: December 10, 2020Publication date: February 9, 2023Inventors: Heping LING, Hua PAN, Feiyue XIE, Ri HUANG, Yihao ZHENG
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Publication number: 20220409869Abstract: A dynamic balloon angioplasty system for applying a dynamic pressure to fracture hardened materials embedded within an elastic conduit. The system having a pressure source system outputting at least a first predetermined pressure from a pressure source outlet, and an angioplasty unit fluidly coupled to the pressure source outlet receiving at least the first predetermined pressure. The angioplasty unit having an angioplasty inflation device, an angioplasty balloon connector, and an oscillating mechanism selectively actuated to output a plurality of pressure pulses to the angioplasty balloon via a fluid communication path. A control system is configured to determine an optimal hydraulic pressure oscillation frequency and amplitude for a given procedure and output a control signal to the oscillating mechanism, and monitor a pressure signal to detect fracture of the hardened material within the elastic conduit or system failure or leakage.Type: ApplicationFiled: August 29, 2022Publication date: December 29, 2022Inventors: Robert CHISENA, Hitinder S. GURM, Matthew HILDNER, Yihao ZHENG, Albert SHIH
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Publication number: 20220338900Abstract: An actuated telescoping system for navigation within a vascular lumen and thrombectomy of a thrombus. The system includes a tubular catheter member having an open distal end defining a catheter lumen, a vacuum source, a rotational drive system, a flexible shaft having a channel coupled to the rotational drive system for rotational movement in response thereto, and an optional guidewire selectively inserted at least partially within the flexible shaft. The flexible shaft is at least partially disposed within the tubular catheter member configured for uncoupled rotational and translational motion therein and to optionally define a corkscrew motion in response to rotational driving force by the drive system that results in formation of hydrodynamic vortices within the catheter lumen.Type: ApplicationFiled: December 2, 2021Publication date: October 27, 2022Inventors: Luis Emilio SAVASTANO, Jeffrey Stephen PLOTT, Yang LIU, Yihao ZHENG, Albert Jau-Min SHIH
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Patent number: 11464949Abstract: A dynamic balloon angioplasty system for applying a dynamic pressure to fracture hardened materials embedded within an elastic conduit. The system having a pressure source system outputting at least a first predetermined pressure from a pressure source outlet, and an angioplasty unit fluidly coupled to the pressure source outlet receiving at least the first predetermined pressure. The angioplasty unit having an angioplasty inflation device, an angioplasty balloon connector, and an oscillating mechanism selectively actuated to output a plurality of pressure pulses to the angioplasty balloon via a fluid communication path. A control system is configured to determine an optimal hydraulic pressure oscillation frequency and amplitude for a given procedure and output a control signal to the oscillating mechanism, and monitor a pressure signal to detect fracture of the hardened material within the elastic conduit or system failure or leakage.Type: GrantFiled: October 16, 2019Date of Patent: October 11, 2022Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Robert Chisena, Hitinder S. Gurm, Matthew Hildner, Yihao Zheng, Albert Shih
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Publication number: 20220294380Abstract: The disclosure provides a motor and an energy conversion device. The motor includes a motor coil having x sets of windings. A number of phases of the x sets of windings is mx. In each of the x sets of windings, each phase winding includes nx coil branches. A first end of each of the nx coil branches is connected with a first end of a coil branch separated from the coil branch by an electrical angle of 360 degrees, to form mx phase endpoints. A second end of each of the nx coil branches of each phase winding is connected with a second end of a coil branch separated from the coil branch by an electrical angle of P*(360*k1+360/mx) degrees to form nx neutral points, nx?mx?2, nx?3, p=±1, 1?k1?(nx?1), and mx, nx, and k1 are integers.Type: ApplicationFiled: August 13, 2020Publication date: September 15, 2022Inventors: Feiyue XIE, Changjiu LIU, Jicheng LI, Lei HU, Yihao ZHENG
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Patent number: 11224458Abstract: An actuated telescoping system for navigation within a vascular lumen and thrombectomy of a thrombus. The system includes a tubular catheter member having an open distal end defining a catheter lumen, a vacuum source, a rotational drive system, a flexible shaft having a channel coupled to the rotational drive system for rotational movement in response thereto, and an optional guidewire selectively inserted at least partially within the flexible shaft. The flexible shaft is at least partially disposed within the tubular catheter member configured for uncoupled rotational and translational motion therein and to optionally define a corkscrew motion in response to rotational driving force by the drive system that results in formation of hydrodynamic vortices within the catheter lumen.Type: GrantFiled: September 21, 2020Date of Patent: January 18, 2022Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Luis Emilio Savastano, Jeffrey Stephen Plott, Yang Liu, Yihao Zheng, Albert Jau-Min Shih
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Patent number: 11191563Abstract: An actuated telescoping system for navigation within a vascular lumen and thrombectomy of a thrombus. The system includes a tubular catheter member having an open distal end defining a catheter lumen, a vacuum source, a rotational drive system, a flexible shaft having a channel coupled to the rotational drive system for rotational movement in response thereto, and an optional guidewire selectively inserted at least partially within the flexible shaft. The flexible shaft is at least partially disposed within the tubular catheter member configured for uncoupled rotational and translational motion therein and to optionally define a corkscrew motion in response to rotational driving force by the drive system that results in formation of hydrodynamic vortices within the catheter lumen.Type: GrantFiled: September 21, 2020Date of Patent: December 7, 2021Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Luis Emilio Savastano, Jeffrey Stephen Plott, Yang Liu, Yihao Zheng, Albert Jau-Min Shih
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Patent number: 10960178Abstract: An actuated telescoping system for navigation within a vascular lumen and thrombectomy of a thrombus. The system includes a tubular catheter member having an open distal end defining a catheter lumen, a vacuum source, a rotational drive system, a flexible shaft having a channel coupled to the rotational drive system for rotational movement in response thereto, and an optional guidewire selectively inserted at least partially within the flexible shaft. The flexible shaft is at least partially disposed within the tubular catheter member configured for uncoupled rotational and translational motion therein and to optionally define a corkscrew motion in response to rotational driving force by the drive system that results in formation of hydrodynamic vortices within the catheter lumen.Type: GrantFiled: October 10, 2018Date of Patent: March 30, 2021Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Luis Emilio Savastano, Jeffrey Stephen Plott, Yang Liu, Yihao Zheng, Albert Jau-Min Shih
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Patent number: 10945757Abstract: A method of two-phase atherectomy for removal of plaque within an artery forming a stenosis including a first phase of rotational drilling by exerting a rotational force on a cutter to form a channel within the plaque having a diameter substantially equal to a diameter of the cutter—the cutter being rotated at a first rotational speed sufficient to maintain rotation of the cutter about a stationary rotational axis—and a second phase of orbital impact by exerting a rotational force on the cutter to result in radial orbital motion of the cutter within the channel resulting in periodic impact of the cutter upon the plaque to form micro-fractures within the plaque and enlarge the diameter of the channel to a diameter substantially greater than the diameter of the cutter—the cutter being rotated at a second rotational speed to result in the radial orbital motion of the cutter.Type: GrantFiled: October 17, 2017Date of Patent: March 16, 2021Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Hitinder S. Gurm, Yao Liu, Yang Liu, Yihao Zheng, Albert Shih
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Publication number: 20210045770Abstract: An actuated telescoping system for navigation within a vascular lumen and thrombectomy of a thrombus. The system includes a tubular catheter member having an open distal end defining a catheter lumen, a vacuum source, a rotational drive system, a flexible shaft having a channel coupled to the rotational drive system for rotational movement in response thereto, and an optional guidewire selectively inserted at least partially within the flexible shaft. The flexible shaft is at least partially disposed within the tubular catheter member configured for uncoupled rotational and translational motion therein and to optionally define a corkscrew motion in response to rotational driving force by the drive system that results in formation of hydrodynamic vortices within the catheter lumen.Type: ApplicationFiled: September 21, 2020Publication date: February 18, 2021Inventors: Luis Emilio SAVASTANO, Jeffrey Stephen PLOTT, Yang LIU, Yihao ZHENG, Albert Jau-Min SHIH
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Publication number: 20200046949Abstract: A dynamic balloon angioplasty system for applying a dynamic pressure to fracture hardened materials embedded within an elastic conduit. The system having a pressure source system outputting at least a first predetermined pressure from a pressure source outlet, and an angioplasty unit fluidly coupled to the pressure source outlet receiving at least the first predetermined pressure. The angioplasty unit having an angioplasty inflation device, an angioplasty balloon connector, and an oscillating mechanism selectively actuated to output a plurality of pressure pulses to the angioplasty balloon via a fluid communication path. A control system is configured to determine an optimal hydraulic pressure oscillation frequency and amplitude for a given procedure and output a control signal to the oscillating mechanism, and monitor a pressure signal to detect fracture of the hardened material within the elastic conduit or system failure or leakage.Type: ApplicationFiled: October 16, 2019Publication date: February 13, 2020Inventors: Robert CHISENA, Hitinder S. GURM, Matthew HILDNER, Yihao ZHENG, Albert SHIH
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Publication number: 20190262035Abstract: A method of two-phase atherectomy for removal of plaque within an artery forming a stenosis including a first phase of rotational drilling by exerting a rotational force on a cutter to form a channel within the plaque having a diameter substantially equal to a diameter of the cutter—the cutter being rotated at a first rotational speed sufficient to maintain rotation of the cutter about a stationary rotational axis—and a second phase of orbital impact by exerting a rotational force on the cutter to result in radial orbital motion of the cutter within the channel resulting in periodic impact of the cutter upon the plaque to form micro-fractures within the plaque and enlarge the diameter of the channel to a diameter substantially greater than the diameter of the cutter—the cutter being rotated at a second rotational speed to result in the radial orbital motion of the cutter.Type: ApplicationFiled: October 17, 2017Publication date: August 29, 2019Inventors: Hitinder S. GURM, Yao LIU, Yang LIU, Yihao ZHENG, Albert SHIH
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Patent number: 10299820Abstract: The present system is directed in various embodiments to rotational atherectomy systems and methods generally. More specifically, a method for methodically softening and disrupting calcification within the wall of a biological conduit or lumen. This result is achieved by use of at least one eccentric head that, during high-speed rotation within the exemplary lumen, produces a combination of a low-frequency orbital motion comprising a force that is exerted against the lumen wall, with concomitant deflection of same, and a high-frequency pulsatile frequency, also with concomitant exertion of force against the lumen wall and deflection of same. These force-driven deflections produce shockwaves within the layers of the exemplary artery's wall layers, resulting in systematic disruptions of any calcification within the intimal and/or medial layers of the subject artery. In addition, any calcification within the occlusion is also softened and disrupted, increasing compliance of the vessel and/or lesion.Type: GrantFiled: February 18, 2016Date of Patent: May 28, 2019Assignee: Cardiovascular Systems, Inc.Inventors: Robert E. Kohler, Brad J. Martinsen, Michael X. Yang, Yihao Zheng, Albert Shih, Rohit Deokar
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Publication number: 20190038300Abstract: An actuated telescoping system for navigation within a vascular lumen and thrombectomy of a thrombus. The system includes a tubular catheter member having an open distal end defining a catheter lumen, a vacuum source, a rotational drive system, a flexible shaft having a channel coupled to the rotational drive system for rotational movement in response thereto, and an optional guidewire selectively inserted at least partially within the flexible shaft. The flexible shaft is at least partially disposed within the tubular catheter member configured for uncoupled rotational and translational motion therein and to optionally define a corkscrew motion in response to rotational driving force by the drive system that results in formation of hydrodynamic vortices within the catheter lumen.Type: ApplicationFiled: October 10, 2018Publication date: February 7, 2019Inventors: Luis Emilio SAVASTANO, Jeffrey Stephen PLOTT, Yang LIU, Yihao ZHENG, Albert Jau-Min SHIH
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Publication number: 20160242805Abstract: The present system is directed in various embodiments to rotational atherectomy systems and methods generally. More specifically, a method for methodically softening and otherwise disrupting calcification located within atherosclerotic plaque, lesion or occlusion and/or within the wall of a biological conduit or lumen. For example, calcification within the occlusion and/or intimal and/or medial layer walls of a blood vessel, e.g., an artery, may be methodically softened or otherwise disrupted with various embodiments of the present invention. The softening and/or disruption of the calcification in the walls of the exemplary artery is accomplished in conjunction with abrading removal of any occlusion located on the interior surface of the exemplary artery and, therefore, located within the artery's lumen.Type: ApplicationFiled: February 18, 2016Publication date: August 25, 2016Inventors: Robert E. Kohler, Brad J. Martinsen, Michael X. Yang, Yihao Zheng, Albert Shih, Rohit Deokar