Patents by Inventor Xiliang Zhang
Xiliang Zhang 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: 20240138833Abstract: A surgical stapling device includes an end effector frame and a replaceable reload assembly. The reload assembly includes a reload frame, a cartridge assembly, and an anvil assembly. The reload frame includes a longitudinal portion and a transverse portion that supports the anvil assembly. The longitudinal portion of the reload frame is engaged with the cartridge assembly via interlocking structure that facilitates movement of the cartridge assembly in relation to the anvil assembly between spaced and clamped positions. The reload frame is configured to be received on the end effector frame to properly position the cartridge and anvil assemblies in relation to each other.Type: ApplicationFiled: March 5, 2021Publication date: May 2, 2024Inventors: Zhaokai Wang, Xiliang Zhang, Syed Sarfraz Ahamed
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Patent number: 11937192Abstract: Certain aspects of the present disclosure relate to techniques for power control and user multiplexing for coordinated multi-point (CoMP) transmission and reception in heterogeneous networks (HetNet).Type: GrantFiled: July 16, 2021Date of Patent: March 19, 2024Assignee: QUALCOMM IncorporatedInventors: Hao Xu, Xiliang Luo, Xiaoxia Zhang, Peter Gaal, Tingfang Ji, Juan Montojo
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Patent number: 11896233Abstract: A circular stapling device includes a manually operated trigger (24) that is adapted to allow staple formation to occur prior to cutting of tissue during a single actuation of the firing trigger (24). The stapling device (10) minimizes stretching and movement of tissue during staple formation to improve staple formation. The stapling device (10) also reduces the amount of force required to move the firing trigger (24) through a firing stroke by separating the staple formation and tissue cutting functions of the stapling device (10) to reduce stress on a clinician's hand during actuation of the stapling device (10).Type: GrantFiled: May 31, 2019Date of Patent: February 13, 2024Assignee: Covidien LPInventors: Yuandong Tan, Xiliang Zhang
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Publication number: 20230157694Abstract: A circular stapling apparatus including a stationary handle, a trigger pivotably coupled to the stationary handle, a trigger lock selectively engageable with the trigger, and a firing link coupled to the trigger. The firing link has a catch thereon. The trigger lock has a latch assembly that is selectively engageable with the catch.Type: ApplicationFiled: April 28, 2020Publication date: May 25, 2023Inventors: Yanjun Jiao, Xiliang Zhang, Yuandong Tan
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Patent number: 11642135Abstract: A circular stapling device includes structure to position an anvil assembly in proper alignment with a cartridge assembly prior to firing of the stapling device. The stapling device includes an anvil assembly, a cartridge assembly including a staple cartridge and shell housing, and an anvil retainer that has a proximal portion including a longitudinal rib and a distal portion including at least one second longitudinal rib. The first longitudinal rib is received within a slot formed within the shell housing to prevent rotation of the anvil retainer in relation to the shell housing. The at least one second longitudinal rib is received within a longitudinal channel of the anvil assembly to prevent rotation of the anvil assembly in relation to the anvil retainer. The presently disclosed structure obviates the need for splines and the disadvantages associated with the use of splines.Type: GrantFiled: December 17, 2021Date of Patent: May 9, 2023Assignee: Covidien LPInventors: Dongming Shen, Xiliang Zhang, Syed Sarfraz Ahamed
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Patent number: 11564691Abstract: A powered circular stapling device (10) includes a transfer switch assembly (90) for a transmission assembly (40) to selectively direct power between clamping and firing mechanisms of the stapling device (10). The transfer switch assembly (90) includes a carriage (92), a worm gear assembly (94), and first and second biasing mechanisms (96). The worm gear assembly (94) is supported on the carriage (92) and movable in relation to the carriage (92) to allow the worm gear assembly (94) to engage with a first or second gear (44, 46) of the transmission assembly (40). The biasing mechanisms (96) allow the worm gear assembly (94) to move in relation to the carriage (92) when the gear teeth of the worm gear (94) are misaligned with the gear teeth of one of the first and second gears (44, 46) of the transmission assembly (40), to allow the gear teeth of the worm gear (94) to move into alignment with the gear teeth of the other one of the first and second gears (44, 46) of the transmission assembly (40).Type: GrantFiled: August 24, 2018Date of Patent: January 31, 2023Assignee: Covidien LPInventors: Yanli Wan, Zhaokai Wang, Xiliang Zhang
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Patent number: 11540828Abstract: An adjustment mechanism for adjusting a formed staple height of a suture staple in a stapler comprises a first handle portion and a second handle portion. The first handle portion comprises a cartridge support located at a distal end, a cartridge assembly, a drive assembly, and the adjustment mechanism for adjusting a formed staple height of a suture staple, and the second handle portion comprises an anvil located at a distal end. The cartridge assembly comprises suture staples, and the drive assembly can drive a suture staple to leave the cartridge assembly to reach the anvil to be pressed and formed. The adjustment structure adjusts a distance between the drive assembly and the anvil to adjust a formed staple height of a suture staple in a stapler. This application further relates to a stapler, comprising the adjustment mechanism for adjusting a formed staple height of a suture staple in a stapler.Type: GrantFiled: June 27, 2017Date of Patent: January 3, 2023Assignees: SHANGHAI YISI MEDICAL TECHNOLOGY CO., LTD., YISI (SUZHOU) MEDICAL TECHNOLOGY CO., LTD.Inventors: Honglin Nie, Guang Yang, Xiliang Zhang, Xiufeng Shi, Anhua Li
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Patent number: 11382629Abstract: A surgical stapling device includes a proximal handle assembly, an elongated central body portion that extends distally from the proximal handle assembly to a distal end portion, a tool assembly supported on the distal end portion of the elongated central body portion, and an audible indicator mechanism supported by the proximal handle assembly. The proximal handle assembly includes a contact arm and the audible indicator mechanism includes a cam member. The cam member contacts the contact arm of the proximal handle assembly as the cam member moves between distal and proximal positions to generate an audible sound that indicates that the tool assembly was fired.Type: GrantFiled: March 9, 2017Date of Patent: July 12, 2022Assignee: COVIDIEN LPInventors: Zhaokai Wang, Dongming Shen, Xiliang Zhang
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Publication number: 20220211381Abstract: A circular stapling device includes a manually operated trigger (24) that is adapted to allow staple formation to occur prior to cutting of tissue during a single actuation of the firing trigger (24). The stapling device (10) minimizes stretching and movement of tissue during staple formation to improve staple formation. The stapling device (10) also reduces the amount of force required to move the firing trigger (24) through a firing stroke by separating the staple formation and tissue cutting functions of the stapling device (10) to reduce stress on a clinician's hand during actuation of the stapling device (10).Type: ApplicationFiled: May 31, 2019Publication date: July 7, 2022Inventors: Yuandong Tan, Xiliang Zhang
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Patent number: 11307169Abstract: A pH sensor with automatic water storage and replenishment, including a substrate, a working electrode, a reference electrode, a first piezoelectric micropump, a water storage device, and a second piezoelectric micropump. The working electrode, the reference electrode, the first piezoelectric micropump, the water storage device, and the second piezoelectric micropump are arranged on the substrate. The working electrode and the reference electrode are each connected to a bonding pad through an electrode lead. The second piezoelectric micropump, the water storage device, and the first piezoelectric micropump are sequentially communicated, and a liquid flows to the working electrode via an outlet of the first piezoelectric micropump.Type: GrantFiled: April 28, 2020Date of Patent: April 19, 2022Assignee: JIANGSU UNIVERSITYInventors: Xiliang Zhang, Chengxuan Lu, Cheng Chen, Shengkang Zong, Mengyao Ni
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Publication number: 20220104825Abstract: A circular stapling device includes structure to position an anvil assembly in proper alignment with a cartridge assembly prior to firing of the stapling device. The stapling device includes an anvil assembly, a cartridge assembly including a staple cartridge and shell housing, and an anvil retainer that has a proximal portion including a longitudinal rib and a distal portion including at least one second longitudinal rib. The first longitudinal rib is received within a slot formed within the shell housing to prevent rotation of the anvil retainer in relation to the shell housing. The at least one second longitudinal rib is received within a longitudinal channel of the anvil assembly to prevent rotation of the anvil assembly in relation to the anvil retainer. The presently disclosed structure obviates the need for splines and the disadvantages associated with the use of splines.Type: ApplicationFiled: December 17, 2021Publication date: April 7, 2022Inventors: Dongming Shen, Xiliang Zhang, Syed Sarfraz Ahamed
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Patent number: 11234703Abstract: A circular stapling device includes structure to position an anvil assembly in proper alignment with a cartridge assembly prior to firing of the stapling device. The stapling device includes an anvil assembly, a cartridge assembly including a staple cartridge and shell housing, and an anvil retainer that has a proximal portion including a longitudinal rib and a distal portion including at least one second longitudinal rib. The first longitudinal rib is received within a slot formed within the shell housing to prevent rotation of the anvil retainer in relation to the shell housing. The at least one second longitudinal rib is received within a longitudinal channel of the anvil assembly to prevent rotation of the anvil assembly in relation to the anvil retainer. The presently disclosed structure obviates the need for splines and the disadvantages associated with the use of splines.Type: GrantFiled: September 1, 2017Date of Patent: February 1, 2022Assignee: Covidien LPInventors: Dongming Shen, Xiliang Zhang, Syed Sarfraz Ahamed
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Publication number: 20210356425Abstract: A pH sensor with automatic water storage and replenishment, including a substrate, a working electrode, a reference electrode, a first piezoelectric micropump, a water storage device, and a second piezoelectric micropump. The working electrode, the reference electrode, the first piezoelectric micropump, the water storage device, and the second piezoelectric micropump are arranged on the substrate. The working electrode and the reference electrode are each connected to a bonding pad through an electrode lead. The second piezoelectric micropump, the water storage device, and the first piezoelectric micropump are sequentially communicated, and a liquid flows to the working electrode via an outlet of the first piezoelectric micropump.Type: ApplicationFiled: April 28, 2020Publication date: November 18, 2021Applicant: JIANGSU UNIVERSITYInventors: Xiliang ZHANG, Chengxuan LU, Cheng CHEN, Shengkang ZONG, Mengyao NI
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Publication number: 20210322013Abstract: A powered circular stapling device (10) includes a transfer switch assembly (90) for a transmission assembly (40) to selectively direct power between clamping and firing mechanisms of the stapling device (10). The transfer switch assembly (90) includes a carriage (92), a worm gear assembly (94), and first and second biasing mechanisms (96). The worm gear assembly (94) is supported on the carriage (92) and movable in relation to the carriage (92) to allow the worm gear assembly (94) to engage with a first or second gear (44, 46) of the transmission assembly (40). The biasing mechanisms (96) allow the worm gear assembly (94) to move in relation to the carriage (92) when the gear teeth of the worm gear (94) are misaligned with the gear teeth of one of the first and second gears (44, 46) of the transmission assembly (40), to allow the gear teeth of the worm gear (94) to move into alignment with the gear teeth of the other one of the first and second gears (44, 46) of the transmission assembly (40).Type: ApplicationFiled: August 24, 2018Publication date: October 21, 2021Inventors: Yanli Wan, Zhaokai Wang, Xiliang Zhang
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Patent number: 11150211Abstract: Provided is a fabrication method for a composite planar pH sensor modified by graphene film including: slotting into substrate, setting copper foil on both sides, and setting leads on the copper foil; coating graphene film on the copper foils using micro mechanical stripping method to form the first graphene film and the second graphene film; depositing Sb layer and Sb2O3 layer successively on the first graphene film by magnetron sputtering method, and coating Nafion™ perfluorinated sulfonic acid membrane on the Sb2O3 layer by spin-coating method to fabricate pH working electrode; depositing Ag layer on the second graphene film and dipping in FeCl3 solution to form AgCl layer; coating the third graphene film on the AgCl layer to fabricate reference electrode. The composite planar pH sensor modified by graphene film may be used in pH measurement for solid, semisolid, mash and solution samples.Type: GrantFiled: May 19, 2016Date of Patent: October 19, 2021Assignee: Jiangsu UniversityInventors: Xiliang Zhang, Kun Xu, Shoujuan Cui, Miaomiao Geng, Pingping Li, Shiqing Zhang
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Patent number: 11071549Abstract: A surgical stapling device includes an anvil assembly including an anvil shaft and an anvil head assembly that is supported on a distal end portion of the anvil shaft. The anvil shaft defines a longitudinal axis and supports a first spline, a second spline, and a third spline. Each of the first, second, and third splines includes a pair of tapered camming surfaces that meet at a proximal end of the respective spline to define an apex. The apex of the first spline is positioned on the anvil shaft at a location proximal of the apex of the second spline, and the apex of the second spline is positioned on the anvil shaft at a location proximal of the apex of the third spline. In embodiments, each of the splines includes an apex. The apex of the first spline is aligned with a longitudinal axis of the first spline and the apex of the second and third splines are aligned with a longitudinal axis of the second and third splines, respectively.Type: GrantFiled: March 23, 2017Date of Patent: July 27, 2021Assignee: Covidien LPInventors: Zhaokai Wang, Xiliang Zhang
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Publication number: 20210121182Abstract: A circular stapling device includes structure to position an anvil assembly in proper alignment with a cartridge assembly prior to firing of the stapling device. The stapling device includes an anvil assembly, a cartridge assembly including a staple cartridge and shell housing, and an anvil retainer that has a proximal portion including a longitudinal rib and a distal portion including at least one second longitudinal rib. The first longitudinal rib is received within a slot formed within the shell housing to prevent rotation of the anvil retainer in relation to the shell housing. The at least one second longitudinal rib is received within a longitudinal channel of the anvil assembly to prevent rotation of the anvil assembly in relation to the anvil retainer. The presently disclosed structure obviates the need for splines and the disadvantages associated with the use of splines.Type: ApplicationFiled: September 1, 2017Publication date: April 29, 2021Inventors: Dongming Shen, Xiliang Zhang, Syed Sarfraz Ahamed
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Patent number: 10973522Abstract: A surgical stapler includes a handle assembly, a central body extending distally from the handle assembly, an anvil assembly and a cartridge assembly. The handle assembly includes a stationary handle defining a window and a tissue gap indicator assembly that includes a slide that supports indicia that is visible through the window. The indicator assembly includes a lever which couples the slide to a drive screw of the surgical stapler to translate movement of the drive screw into movement of the slide. The lever is configured and adapted to translate movement of the drive screw over a distance of X1 into movement of the slide over a distance of X2, wherein X2 is greater than X1.Type: GrantFiled: October 20, 2015Date of Patent: April 13, 2021Assignee: Covidien LPInventor: Xiliang Zhang
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Patent number: 10932783Abstract: A surgical stapling device includes a handle assembly that supports an audible indicator mechanism including a spring biased clicker. The spring biased clicker includes a pin that is received within a pin slot or cavity in the housing of a stationary handle of the handle assembly. The pin is movable through the cavity in response to actuation of the firing trigger assembly and unapproximation of the anvil assembly to guide movement of the clicker such that the clicker 1) provides an enhanced audible indication to a clinician that the firing stroke of a firing trigger has been completed, and 2) provides an enhanced indication to a clinician that the anvil assembly has been moved back to the unapproximated or spaced position after the firing stroke has been completed.Type: GrantFiled: November 13, 2015Date of Patent: March 2, 2021Assignee: Covidien LPInventor: Xiliang Zhang
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Patent number: 10874399Abstract: A surgical stapling device includes a visual indicator mechanism that provides a clinician with greater visualization of the movement of an anvil assembly in relation to a cartridge assembly after the anvil and cartridge assemblies have been approximated to within a firing zone. The visual indicator mechanism improves visualization of the different degrees of approximation within the firing zone by providing an indicator cover having spaced slots that allow indicia formed on an indicator member to sequentially appear within the spaced slots to identify the different degrees of approximation within the firing zone.Type: GrantFiled: February 4, 2016Date of Patent: December 29, 2020Assignee: Covidien LPInventor: Xiliang Zhang