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    • 6. 发明授权
    • Methods for manufacturing endodontic instruments from powdered metals
    • 从粉末状金属制造牙髓治疗仪器的方法
    • US07743505B2
    • 2010-06-29
    • US11063757
    • 2005-02-23
    • Paul LewisJohn Nielsen
    • Paul LewisJohn Nielsen
    • B21F43/00B23P13/00
    • B21H3/06A61C5/42B21H3/04B21H7/00B22F3/168B22F3/24B22F2003/241B22F2003/247B22F2998/10Y10T29/49218Y10T29/49567Y10T29/49568B22F1/0059B22F3/225
    • Endodontic instruments or intermediate products (e.g., blanks) used to form finished endodontic instruments having a desired cutting edge and/or taper are formed, at least in part, by molding a metal powder into a desired shape and then sintering the metal particles together. The metal powder is initially formed into a green molded part that is sintered to yield a solid metal part. The sintered metal part may optionally be further processed by additional steps, as needed, to yield a finished endodontic instrument. One additional process includes cold forming the sintered metal body to provide a cutting edge, remove cracks and microfissures, or otherwise modify the characteristics of an intermediate product or endodontic instrument. Other processes include chemical milling and mechanical milling, grinding or cutting to sharpen the cutting edge, form a taper, or otherwise modify the intermediate product or endodontic instrument in a desired manner.
    • 至少部分地通过将金属粉末模制成所需形状,然后将金属颗粒烧结在一起而形成用于形成具有所需切削刃和/或锥度的成品牙根管器械的根管器械或中间产品(例如坯件)。 金属粉末最初形成为烧结的生坯成型部,得到固体金属部分。 根据需要,烧结金属部件可以可选地进一步通过附加步骤进一步处理,以产生成品的牙髓器械。 一种额外的方法包括冷成型烧结金属体以提供切削刃,去除裂纹和微裂纹,或以其它方式改变中间产品或牙髓器械的特性。 其他方法包括化学研磨和机械研磨,研磨或切割以锐化切割边缘,形成锥形,或以所需方式改变中间产品或牙髓器具。
    • 10. 发明申请
    • Method for controlling a power-grid connected wind turbine generator during grid faults and apparatus for implementing said method
    • 在电网故障期间控制并网连接的风力发电机的方法和用于实现所述方法的装置
    • US20060238929A1
    • 2006-10-26
    • US10544639
    • 2003-02-07
    • John Nielsen
    • John Nielsen
    • H02H7/06
    • F03D7/0284F03D9/255H02P3/22H02P9/006H02P9/007H02P9/10H02P2101/15Y02E10/72
    • The present invention relates to a method and an apparatus for controlling a power-grid connected wind turbine generator during grid faults. During grid faults, the stator windings of the wind turbine generator are disconnected from the power grid and impedances for dissipating at least part of the power generated by the wind turbine during grid fault condition are connected to the stator windings. In this way, a certain magnetisation of the generator can be maintained and after removal of the grid fault condition, the generator is synchronised to the power grid and the impedances are disconnected and the stator windings are reconnected to the power grid. In this way, it is possible to keep the wind turbine generator at least partly magnetised during grid faults and thus ready for delivering power to the power grid, as soon as the grid voltage is re-established after the fault.
    • 本发明涉及在电网故障期间控制并网连接的风力发电机的方法和装置。 在电网故障期间,风力发电机的定子绕组与电网断开连接,并且在电网故障状态期间将由风力涡轮机产生的功率的至少一部分消耗的阻抗连接到定子绕组。 以这种方式,可以保持发电机的某种磁化,并且在去除电网故障状况之后,发电机与电网同步,并且阻抗被断开,并且定子绕组重新连接到电网。 以这种方式,一旦在故障之后重新建立电网电压,就可以在电网故障期间保持风力涡轮发电机至少部分地被磁化,并且因此准备好向电网供电。