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公开(公告)号：US11251716B2
公开(公告)日：2022-02-15
申请号：US17102177
申请日：2020-11-23
发明人： Andrew M. Cross , Arash Amiri
IPC分类号： H02M5/293
摘要： An alternating current power electronic converter includes an alternating current chopper circuit including two pairs of switches, each switch of a pair connected in series and the two pairs of switches connected in parallel. Each switch of a pair is a uni-directional switch. The uni-directional switches of each pair are arranged in opposing directions, and the uni-directional switches of one pair of switches are arranged in an opposing configuration to the uni-directional switches of the other pair of switches. The circuit comprises a bridge connection between switches of each pair of switches. A controller is configured to control a sequence of operation of the switches, providing an overlap period whenever one of the switches of a pair changes from open to closed and the other switch of the pair changes from closed to open. During the overlap period the switch that is moving from closed to open remains closed.
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公开(公告)号：US10731042B2
公开(公告)日：2020-08-04
申请号：US15558956
申请日：2016-03-18
IPC分类号： C08K7/00 , C09D7/40 , C09D5/00 , H05K3/28 , C09D7/61 , C09D7/62 , C09D175/04 , C08K3/34 , C08K9/02 , C08K9/04 , H05K1/03
摘要： A nanocomposite coating composition for use in the mitigation of whisker growth from a metallic surface (82) includes a polymer matrix (86) comprising a base polymer and insulating material nanoplatelets (85), for example clay nanoplatelets, within the polymer matrix (86). A conformal coating (84) for application to a metal surface (82) is formed from the coating composition. The conformal coating mitigates the spontaneous growth of whiskers (83), in particular tin whiskers, from the coated surface (82), reducing the risk of short-circuits caused by such whiskers bridging gaps within electronic devices. Methods are provided for the preparation of coating compositions and coatings.
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公开(公告)号：US20200023312A1
公开(公告)日：2020-01-23
申请号：US16465825
申请日：2017-12-01
发明人： Jonathan WILSON , Graham HARGRAVE
摘要： A process for reducing nitrogen oxides in an exhaust stream, such as a vehicle exhaust stream, and apparatus for carrying out the process. The process comprises providing a first composition comprising aqueous urea, a second composition comprising ammonium carbamate and an exhaust stream comprising nitrogen oxides. A process for producing the ammonium carbamate is also provided. The second composition may be introduced into the exhaust stream (10) when the exhaust stream has a temperature below a threshold temperature and the first composition may be introduced into the exhaust stream when the exhaust stream has a temperature at or above the threshold temperature.
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公开(公告)号：US20190282262A1
公开(公告)日：2019-09-19
申请号：US16071411
申请日：2017-01-20
发明人： Kaddour BOUAZZA-MAROUF , Atul GAUR
摘要： A needle guide system for use with an ultrasound probe, the system comprising a surface marking guide and a needle guide. The surface marking guide includes an attachment portion for attaching the marking guide to an ultrasound probe, and a surface contact portion fixed to the attachment portion and including one or more features for identifying to a user where to mark a surface when the ultrasound probe is held against the surface. The needle guide includes a base to support the needle guide on the surface, one or more features on the base for alignment with marks made on the surface, and a needle support mounted on the base and having a needle channel through which a needle can extend, the needle channel having a known position and orientation relative to the base. We also describe a needle guide for use with an ultrasound probe to guide a needle along a predetermined path relative to the ultrasound probe.
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公开(公告)号：US10150860B2
公开(公告)日：2018-12-11
申请号：US14834350
申请日：2015-08-24
IPC分类号： C08L25/14 , C08F10/02 , C08G69/02 , C08L23/02 , C08L25/06 , C08F110/02 , C08F210/16 , C08L75/04
摘要： A method for controlling the physical state of an ultra-high molecular weight polymer to make the ultra-high molecular weight polymer suitable for further processing, and related polymers compositions methods and systems, wherein the method comprises combining a catalyst, monomers, and an additive, for a time and under condition to allow synthesis of a nascent polymer and co-crystallization of the nascent polymer with the additive.
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公开(公告)号：US20160278646A1
公开(公告)日：2016-09-29
申请号：US15029984
申请日：2014-10-15
发明人： Sijung HU , Vicente AZORIN-PERIS
CPC分类号： A61B5/02427 , A61B5/0002 , A61B5/0015 , A61B5/01 , A61B5/021 , A61B5/02405 , A61B5/0816 , A61B5/11 , A61B5/14552 , A61B5/7203 , A61B5/7221 , A61B5/7225 , A61B5/742 , A61B5/7475 , A61B2560/0223 , A61B2562/0242 , A61B2562/12 , G16H50/50
摘要： A method of assembling an opto-physiological (OP) sensor comprises: (i) modelling the opto-physiological properties of at least one body tissue type to be monitored; (ii) determining, through application of the model, an optimal optical design for an opto-physiological (OP) sensor operable to monitor the opto-physiological properties of the at least one body tissue type; and (iii) making the OP sensor to the determined optical design. The optimal optical design for the OP sensor comprises: (i) determining the optimum separation of each of a plurality of light sources from a photodetector, based on modelled optical path lengths for light travelling from each light source, through the body tissue type to be monitored, to the photodetector; and (ii) locating light sources of different wavelengths at different distances from the photodetector.
摘要翻译： 组装光生物（OP）传感器的方法包括：（i）对待监测的至少一种身体组织类型的光学生理特性进行建模; （ii）通过应用所述模型来确定可操作以监测所述至少一种身体组织类型的光学生理特性的光学生理（OP）传感器的最佳光学设计; 和（iii）使OP传感器达到确定的光学设计。 用于OP传感器的最佳光学设计包括：（i）基于来自每个光源的光的建模光路长度，通过身体组织类型确定多个光源中的每个光源与光电检测器的最佳分离， 监测到光电检测器; 和（ii）将不同波长的光源定位在与光电检测器不同的距离处。
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公开(公告)号：US20220381726A1
公开(公告)日：2022-12-01
申请号：US17787537
申请日：2020-12-16
发明人： Jung-Sik KIM , Vijay VENKATESAN , Erdogan GUK , Martin CROFT
IPC分类号： G01N27/41 , G01N33/00 , G01N27/406
摘要： Methods and apparatus for sensing hydrogen in a mixture of hydrogen and natural gas are provided. One example of the apparatus comprises: a first chamber for receiving air; a second chamber for receiving the mixture of hydrogen and natural gas; a first electrode for adsorbing oxygen molecules from air in the first chamber and for reducing the oxygen molecules to oxide ions; a second electrode; an ionic conductor for transporting the oxide ions from the first electrode to the second electrode in order to cause the transported oxide ions to combine with hydrogen molecules at the second electrode; sensing circuitry for sensing an electrical parameter associated with the combination of the transported oxide ions with the hydrogen molecules at the second electrode; and processing circuitry configured to determine a proportion of hydrogen in the mixture, based at least in part on the electrical parameter sensed by the sensing circuitry.
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公开(公告)号：US11382655B2
公开(公告)日：2022-07-12
申请号：US16071411
申请日：2017-01-20
发明人： Kaddour Bouazza-Marouf , Atul Gaur
摘要： A needle guide system for use with an ultrasound probe, the system comprising a surface marking guide and a needle guide. The surface marking guide includes an attachment portion for attaching the marking guide to an ultrasound probe, and a surface contact portion fixed to the attachment portion and including one or more features for identifying to a user where to mark a surface when the ultrasound probe is held against the surface. The needle guide includes a base to support the needle guide on the surface, one or more features on the base for alignment with marks made on the surface, and a needle support mounted on the base and having a needle channel through which a needle can extend, the needle channel having a known position and orientation relative to the base. We also describe a needle guide for use with an ultrasound probe to guide a needle along a predetermined path relative to the ultrasound probe.
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公开(公告)号：US20210162658A1
公开(公告)日：2021-06-03
申请号：US17170531
申请日：2021-02-08
IPC分类号： B29C64/153 , B33Y10/00 , B33Y30/00 , B29C64/393 , B33Y40/00 , B33Y50/02 , B29C64/295 , B22F10/20 , B22F3/00
摘要： A method of selectively combining particulate material, comprising: (i) providing a layer of particulate material to a part bed; (ii) providing radiation to sinter a portion of the material of the layer; (iii) providing a further layer of particulate material overlying the prior layer of particulate material including the previously sintered portion of material; (iv) providing radiation to sinter a further portion of the material within the overlying further layer and to sinter said further portion with the previously sintered portion of material in the prior layer; (v) successively repeating blocks (iii) and (iv) to form a three-dimensional object; and wherein at least some of the layers of particulate material are pre-heated with a heater prior to sintering a portion of the material of the respective layer, the heater being configured to move relative to, and proximate, the particulate material.
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公开(公告)号：US10260202B2
公开(公告)日：2019-04-16
申请号：US15106117
申请日：2014-12-17
摘要： A railway points arrangement 10 for a railway track junction comprises at least first and second pairs of longitudinally-extending, parallel-spaced static stock rails 12, 14, defining respectively a first route and a second route, and a pair of longitudinally-extending, parallel-spaced switch rails 16 which are movable between a first position in alignment with the first pair of stock rails 12 to select the first route and a second position in alignment with the second pair of stock rails 14 to select the second route. At least one of the movable switch rails 16a cooperates with at least one stock rail 12, 14 of each of the first and second pairs of stock rails 12, 14 when the movable switch rails 16 are in the first and second positions, and the at least one switch rail 16 and the at least one stock rail 12, 14 are shaped to define a mating profile 50 which aligns the switch rail 16 and stock rail 12, 14 and prevents transverse movement of the switch rail 16 relative to the stock rail 12, 14.
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