Patents by Inventor Pu Zhou
Pu Zhou 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: 20240048138Abstract: The present invention provides a clock circuit comprises an oscillator circuit and a power-on reset circuit, the oscillator circuit comprises a current generating module and a loop oscillation module connected together; the current generating module is used for outputting a control current to the loop oscillation module; the loop oscillation module is used for outputting an oscillation signal with a set frequency under action of the control current; and the power-on reset circuit is used for providing an enabling control signal to the loop oscillation module after a power supply is powered on; the power-on reset circuit is connected to the loop oscillation module.Type: ApplicationFiled: December 22, 2020Publication date: February 8, 2024Inventors: Xi ZENG, Pu ZHOU, Jianxian WEN, Huijie YAN, Xiameng LIAN
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Publication number: 20240033489Abstract: Inflatable devices are disclosed including a surface which has a network of polymer chains and is configured to be inflatable into a therapeutically or diagnostically useful shape, and at least one ultrashort laser pulse-formed modification in the surface. The network can, for example, include a network morphology that is substantially unchanged by modification with the ultrashort pulse laser. Ultrashort laser pulses can be laser pulses equal to or less than 1000 picoseconds in duration. Advantageously, the etching process uses a relatively low-heat laser to avoid significant heating of surrounding polymers while modifying the surface (and other structures) of the device. The process is configured so that the polymer chain morphology adjacent the modification is substantially unaffected by the low-heat laser. The resulting inflatable device has customized surface features while still retaining substantially homogenous polymer network morphology.Type: ApplicationFiled: October 12, 2023Publication date: February 1, 2024Inventors: Pu Zhou, Bin Tian, Yidong M. Zhu
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Patent number: 11813422Abstract: Inflatable devices are disclosed including a surface which has a network of polymer chains and is configured to be inflatable into a therapeutically or diagnostically useful shape, and at least one ultrashort laser pulse-formed modification in the surface. The network can, for example, include a network morphology that is substantially unchanged by modification with the ultrashort pulse laser. Ultrashort laser pulses can be laser pulses equal to or less than 1000 picoseconds in duration. Advantageously, the etching process uses a relatively low-heat laser to avoid significant heating of surrounding polymers while modifying the surface (and other structures) of the device. The process is configured so that the polymer chain morphology adjacent the modification is substantially unaffected by the low-heat laser. The resulting inflatable device has customized surface features while still retaining substantially homogenous polymer network morphology.Type: GrantFiled: April 19, 2022Date of Patent: November 14, 2023Assignee: EDWARDS LIFESCIENCES CORPORATIONInventors: Pu Zhou, Bin Tian, Yidong M. Zhu
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Patent number: 11793385Abstract: An autonomous mobile cleaning robot can include an outer shell and a bumper. The outer shell can include a rim extending around at least a portion of a periphery of the outer shell and can include a first feature connected to the rim. The bumper can be connected to the outer shell and can movable with respect to the outer shell when the bumper is connected to the outer shell. The bumper can include a second feature connected to the inner surface.Type: GrantFiled: April 29, 2022Date of Patent: October 24, 2023Assignee: iRobot CorporationInventors: Andrew J. Pastore, Pu Zhou, Eric Burbank
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Publication number: 20230321407Abstract: An expandable delivery sheath includes an elastic outer tubular layer and an inner tubular layer. The inner tubular layer include a thick wall portion integrally connected to a thin wall portion. The thin wall portion can include longitudinal reinforcing members/rods that facilitate unfolding during the passage of the implant, thus decreasing the push force and increasing the consistency of the push force. The inner tubular layer can have a non-expanded or folded condition wherein the thin wall portion folds onto an outer surface of the thick wall portion under urging of the elastic outer tubular layer. When an implant passes therethrough, the outer tubular layer stretches and the inner tubular layer unfolds into an expanded lumen diameter. Once the implant passes, the outer tubular layer again urges the inner tubular layer into the non-expanded condition with the sheath reassuming its smaller profile.Type: ApplicationFiled: June 7, 2023Publication date: October 12, 2023Inventors: Pu Zhou, Erik Bulman, Baigui Bian
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Patent number: 11707605Abstract: An expandable delivery sheath includes an elastic outer tubular layer and an inner tubular layer. The inner tubular layer include a thick wall portion integrally connected to a thin wall portion. The thin wall portion can include longitudinal reinforcing members/rods that facilitate unfolding during the passage of the implant, thus decreasing the push force and increasing the consistency of the push force. The inner tubular layer can have a non-expanded or folded condition wherein the thin wall portion folds onto an outer surface of the thick wall portion under urging of the elastic outer tubular layer. When an implant passes therethrough, the outer tubular layer stretches and the inner tubular layer unfolds into an expanded lumen diameter. Once the implant passes, the outer tubular layer again urges the inner tubular layer into the non-expanded condition with the sheath reassuming its smaller profile.Type: GrantFiled: October 12, 2020Date of Patent: July 25, 2023Assignee: EDWARDS LIFESCIENCES CORPORATIONInventors: Pu Zhou, Erik Bulman, Baigui Bian
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Publication number: 20230149166Abstract: The methods and devices disclosed herein promote temporal control of balloon inflation patterns. The devices include a covering for a portion of the balloon that compresses the balloon portion during the inflation process. This enables the distal portion of a balloon to be inflated prior to the proximal portion of a balloon, creating a tapered shape at lower inflation pressures. This is especially useful during transvascular implantation procedures, as it prevents dislodgement of an implant mounted on the balloon. As inflation continues, pressure exerted on the balloon by the covering is overcome such that the proximal region of the balloon inflates, forming a shape with generally straighter sides than the tapered shape, thereby expanding the cardiovascular device.Type: ApplicationFiled: January 6, 2023Publication date: May 18, 2023Inventors: Yidong M. Zhu, Pu Zhou, Erik Bulman, Baigui Bian
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Patent number: 11611813Abstract: A method of removing fixed pattern noise, comprising: S01: performing a single-frame segmented exposure on a pixel array; S02: reading a of the pixel array, comprising: S021: performing a soft reset, so as to set the reset signal of the pixel unit to an intermediate voltage, and reading a differential reset signal; S022: performing a hard reset so as to set the reset signal of the pixel unit to a high voltage; S023: turning on a transmission MOS transistor to enable an exposure signal of to photodiode to transmitted to the floating diffusion area, and reading a differential pixel transmission signal; S03: subtracting the differential reset signal from the differential pixel transmission signal to obtain an exposure signal with fixed pattern noise removed. Another method is removing fixed pattern noise and an image sensor are further provided.Type: GrantFiled: July 23, 2020Date of Patent: March 21, 2023Assignee: SHANGHAI IC R&D CENTER CO., LTDInventors: Xi Zeng, Pu Zhou, Huijie Yan, Ying Luo, Xuehong He, Yuan Zhang, Hailing Yang, Xiameng Lian
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Publication number: 20230017997Abstract: Disclosed herein are designs for improved inflatable structures for use during minimally invasive cardiovascular procedures. These inflatable structures facilitate the perfusion of blood through an anatomical structure, such as a heart valve, during the cardiovascular procedure. The inflatable structures are formed of a plurality of balloons arranged radially around a central location. The plurality of balloons form a lumen through which blood flows. Each balloon of the plurality is shaped or configured to stabilize the adjacent balloons, limiting their movement relative to each other. For example, some embodiments can feature balloons with a keystone shape that limits movement of the balloons inward toward the lumen. Some implementations can also include a support coil running through the lumen. The support coil holds enables the lumen to be open to perfusion even in the early stages of balloon inflation.Type: ApplicationFiled: September 29, 2022Publication date: January 19, 2023Inventors: Yidong M. Zhu, Erik Bulman, Baigui Bian, Sam Sok, Pu Zhou
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Patent number: 11547561Abstract: The methods and devices disclosed herein promote temporal control of balloon inflation patterns. The devices include a covering for a portion of the balloon that compresses the balloon portion during the inflation process. This enables the distal portion of a balloon to be inflated prior to the proximal portion of a balloon, creating a tapered shape at lower inflation pressures. This is especially useful during transvascular implantation procedures, as it prevents dislodgement of an implant mounted on the balloon. As inflation continues, pressure exerted on the balloon by the covering is overcome such that the proximal region of the balloon inflates, forming a shape with generally straighter sides than the tapered shape, thereby expanding the cardiovascular device.Type: GrantFiled: August 18, 2020Date of Patent: January 10, 2023Assignee: Edwards Lifesciences CorporationInventors: Yidong M. Zhu, Pu Zhou, Erik Bulman, Baigui Bian
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Publication number: 20220379094Abstract: A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.Type: ApplicationFiled: August 8, 2022Publication date: December 1, 2022Applicant: Edwards Lifesciences CorporationInventors: Pu Zhou, Erik Bulman, Timothy A. Geiser, Michael G. Valdez, Yidong M. Zhu, Baigui Bian, Sonny Tran, Richard D. White, Thanh Huy Le, Tung T. Le, Alpana Kiran Gowdar, Yong Gao, David Delon Williams
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Publication number: 20220345650Abstract: A method of removing fixed pattern noise, comprising: S01: performing a single-frame segmented exposure on a pixel array; S02: reading a signal of the pixel array, comprising: S021: performing a soft reset, so as to set the reset signal of the pixel unit to an intermediate voltage, and reading a differential reset signal; S022: performing a hard reset so as to set the reset signal of the pixel unit to a high voltage; S023: turning on a transmission MOS transistor to enable an exposure signal of the photodiode to be transmitted to the floating diffusion area, and reading a differential pixel transmission signal; S03: subtracting the differential reset signal from the differential pixel transmission signal to obtain an exposure signal with fixed pattern noise removed. Another method of removing fixed pattern noise and an image sensor are further provided.Type: ApplicationFiled: July 23, 2020Publication date: October 27, 2022Inventors: Xi ZENG, Pu ZHOU, Huijie YAN, Ying LUO, Xuehong HE, Yuan ZHANG, Hailing YANG, Xiameng LIAN
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Patent number: 11458771Abstract: A vacuum cleaner can include an upright section, a surface cleaning head coupled to the upright section, and at least one wheel coupled to the surface cleaning head. The at least one wheel can include a hub, a rim, and an absorber. The absorber can extend between the hub and the rim. The absorber can be configured to deform before the rim experiences substantial deformation. A deformation limiter can be provided that is configured to limit the deformation in the absorber.Type: GrantFiled: August 30, 2018Date of Patent: October 4, 2022Assignee: SharkNinja Operating LLCInventors: Jason B. Thorne, Pu Zhou, Ming Yao, Gordon Howes
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Patent number: 11458015Abstract: Disclosed herein are designs for improved inflatable structures for use during minimally invasive cardiovascular procedures. These inflatable structures facilitate the perfusion of blood through an anatomical structure, such as a heart valve, during the cardiovascular procedure. The inflatable structures are formed of a plurality of balloons arranged radially around a central location. The plurality of balloons form a lumen through which blood flows. Each balloon of the plurality is shaped or configured to stabilize the adjacent balloons, limiting their movement relative to each other. For example, some embodiments can feature balloons with a keystone shape that limits movement of the balloons inward toward the lumen. Some implementations can also include a support coil running through the lumen. The support coil holds enables the lumen to be open to perfusion even in the early stages of balloon inflation.Type: GrantFiled: February 14, 2020Date of Patent: October 4, 2022Assignee: Edwards Lifesciences CorporationInventors: Yidong M. Zhu, Erik Bulman, Baigui Bian, Sam Sok, Pu Zhou
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Publication number: 20220280011Abstract: An autonomous mobile cleaning robot can include an outer shell and a bumper. The outer shell can include a rim extending around at least a portion of a periphery of the outer shell and can include a first feature connected to the rim. The bumper can be connected to the outer shell and can movable with respect to the outer shell when the bumper is connected to the outer shell. The bumper can include a second feature connected to the inner surface.Type: ApplicationFiled: April 29, 2022Publication date: September 8, 2022Inventors: Andrew J. Pastore, Pu Zhou, Eric Burbank
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Patent number: 11420026Abstract: A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.Type: GrantFiled: August 26, 2019Date of Patent: August 23, 2022Assignee: Edwards Lifesciences CorporationInventors: Pu Zhou, Erik Bulman, Timothy A. Geiser, Michael G. Valdez, Yidong M. Zhu, Baigui Bian, Sonny Tran, Richard D. White, Thanh Huy Le, Tung T. Le, Alpana Kiran Gowdar, Yong Gao, David Delon Williams
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Patent number: 11406796Abstract: A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.Type: GrantFiled: August 23, 2019Date of Patent: August 9, 2022Assignee: Edwards Lifesciences CorporationInventors: Pu Zhou, Erik Bulman, Timothy A. Geiser, Michael G. Valdez, Yidong M. Zhu, Baigui Bian, Sonny Tran, Richard D. White, Thanh Huy Le, Tung T. Le, Alpana Kiran Gowdar, Yong Gao, David Delon Williams
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Publication number: 20220241563Abstract: Inflatable devices are disclosed including a surface which has a network of polymer chains and is configured to be inflatable into a therapeutically or diagnostically useful shape, and at least one ultrashort laser pulse-formed modification in the surface. The network can, for example, include a network morphology that is substantially unchanged by modification with the ultrashort pulse laser. Ultrashort laser pulses can be laser pulses equal to or less than 1000 picoseconds in duration. Advantageously, the etching process uses a relatively low-heat laser to avoid significant heating of surrounding polymers while modifying the surface (and other structures) of the device. The process is configured so that the polymer chain morphology adjacent the modification is substantially unaffected by the low-heat laser. The resulting inflatable device has customized surface features while still retaining substantially homogenous polymer network morphology.Type: ApplicationFiled: April 19, 2022Publication date: August 4, 2022Applicant: Edwards Lifesciences CorporationInventors: Pu Zhou, Bin Tian, Yidong M. Zhu
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Publication number: 20220151372Abstract: A cleaning roller is mountable to a cleaning robot. The cleaning roller includes a sheath comprising a shell, an outer diameter of the shell tapering from a first end portion of the sheath and a second end portion of the sheath toward a center of the roller. The cleaning roller further includes a core including a central portion interlocked with the sheath to rotationally couple the core to the sheath and inhibit relative translation of the sheath and the core along an axis of rotation. An inner surface of the sheath and an outer surface of the core define an air gap therebetween, the air gap extending from the central portion of the core longitudinally along the axis of rotation toward the first end portion or the second end portion.Type: ApplicationFiled: February 7, 2022Publication date: May 19, 2022Inventors: Matthew Blouin, Pierre Paul Richard Souloumiac, Pu Zhou
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Patent number: 11330953Abstract: An autonomous mobile cleaning robot can include an outer shell and a bumper. The outer shell can include a rim extending around at least a portion of a periphery of the outer shell and can include a first feature connected to the rim. The bumper can be connected to the outer shell and can movable with respect to the outer shell when the bumper is connected to the outer shell. The bumper can include a second feature connected to the inner surface.Type: GrantFiled: September 30, 2019Date of Patent: May 17, 2022Assignee: iRobot CorporationInventors: Andrew J. Pastore, Pu Zhou, Eric Burbank