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71 条记录 (耗时 0.034 秒)

    Thermoplastic polymides and composites therefrom
    44.
    发明授权
    Thermoplastic polymides and composites therefrom 失效
    热塑性聚酰亚胺及其复合材料

    公开(公告)号：US5360671A

    公开(公告)日：1994-11-01

    申请号：US9718

    申请日：1993-01-27

    申请人： Frank W. Harris

    发明人： Frank W. Harris

    IPC分类号： C08J5/04 ,  C08L67/02 ,  C08L77/00 ,  C08L79/08 ,  B32B27/00 ,  B32B27/06

    CPC分类号： C08J5/04 ,  C08L79/08 ,  C08J2379/08 ,  C08L67/02 ,  C08L77/00 ,  Y10T428/2964 ,  Y10T428/2965 ,  Y10T428/2967 ,  Y10T428/2969 ,  Y10T428/2971 ,  Y10T428/30 ,  Y10T428/31721 ,  Y10T442/3594 ,  Y10T442/67 ,  Y10T442/671

    摘要： A new class polyimide and polyimide precursors based on diaryl oxyalkylene diamines, such as 1,3-bis[4-aminophenoxy]-2,2-dimethyl propane, a process for their preparation and their use as the continuous phase for the manufacture of composites and composite laminates reinforced by reinforcing agents such as carbon fibers, Kevlar.TM., and other similar high strength reinforcing agents. The polyimides and molecular composites obtained from the diamines according to the invention show thermoplastic properties, excellent flex fatigue and fracture resistance, and excellent thermal and oxidative stability.

    摘要翻译： 一种基于二芳基氧化烯二胺的新型聚酰亚胺和聚酰亚胺前体，例如1,3-双[4-氨基苯氧基] -2,2-二甲基丙烷，其制备方法及其作为制备复合材料的连续相的用途 以及由增强剂例如碳纤维，Kevlar TM和其它类似的高强度增强剂增强的复合层压板。 由本发明的二胺获得的聚酰亚胺和分子复合材料显示出热塑性，优异的挠曲疲劳和耐断裂性，以及优异的热和氧化稳定性。

    Enamine ketone and enonesulfide polymer systems
    45.
    发明授权
    Enamine ketone and enonesulfide polymer systems 失效
    烯酮和烯硫醚聚合物体系

    公开(公告)号：US5191047A

    公开(公告)日：1993-03-02

    申请号：US780254

    申请日：1991-10-21

    申请人： Frank W. Harris

    发明人： Frank W. Harris

    IPC分类号： C08G75/04

    CPC分类号： C08G75/045

    摘要： Enamine ketone and enonesulfide polymeric solids are prepared by reacting liquid or low-melting propynone terminated enamine ketone and enonesulfide prepolymers in one-step, or more preferably, in two-step processes. Properties of the resulting polymers are determined by the nature of the reactant selected and by the relative amounts of reactants employed. Where the prepolymers formed possess terminal propynone groups, the prepolymers can subsequently be cross-linked. Copolymers can also be formed by reacting the prepolymers of the invention with vinyl-type monomers to form polymers with cross-linked networks. The polymerization techniques disclosed can be employed to produce thermoplastic, thermoset, and elastomeric products, and they are especially useful in reaction injection molding processes, in adhesive systems, in composite formations, for linings, and gaskets which require chemical resistance.

    摘要翻译： 通过使液体或低熔点丙炔酮封端的烯胺酮和烯硫醚预聚物在一步，或更优选两步法中反应制备酮和烯硫醚聚合物固体。 所得聚合物的性质由所选反应物的性质和所用反应物的相对量决定。 当所形成的预聚物具有末端丙炔基时，预聚物可随后进行交联。 共聚物也可以通过使本发明的预聚物与乙烯基型单体反应形成具有交联网络的聚合物形成。 所公开的聚合技术可用于生产热塑性，热固性和弹性体产品，并且它们特别可用于反应注射成型工艺，粘合剂体系，复合地层，衬垫和需要耐化学性的垫圈。

    Microprocessor controlled electronic stimulating device having biphasic pulse output
    46.
    发明授权
    Microprocessor controlled electronic stimulating device having biphasic pulse output 失效
    具有双向脉冲输出的微处理器控制电子刺激装置

    公开(公告)号：US5069211A

    公开(公告)日：1991-12-03

    申请号：US398738

    申请日：1989-08-25

    申请人： James T. Bartelt ,  Frank W. Harris ,  Alan R. Owens

    发明人： James T. Bartelt ,  Frank W. Harris ,  Alan R. Owens

    IPC分类号： A61N1/32 ,  A61N1/34 ,  A61N1/372

    CPC分类号： A61N1/36021 ,  A61N1/326 ,  A61N1/3782

    摘要： An electronic stimulating device is disclosed, with the stimulating device particularly illustrated being a transcutaneous nerve stimulating (TENS) device for effecting suppression of pain by nerve fiber stimulation. Biphasic constant current output pulses are applied to a user through electrode pairs noninvasively positioned at the skin of the user. Microprocessor generated control pulses control generation of the biphasic output pulses at a biphasic output stage associated with each electrode pair, and the generated biphasic output pulses are capacitively coupled from each output stage which also includes a bleeder network for effecting capacitor discharge. Stimulation may be continuously applied at a level selected by the user or may be applied in timed varying intensities the maximum level of which is selectable, and displays of intensity and sensed faults, including low battery voltage, are also provided.

    Moldable and/or extrudable poly(enamine ketone-co-alkylene ether) block compolymers
    47.
    发明授权
    Moldable and/or extrudable poly(enamine ketone-co-alkylene ether) block compolymers 失效
    可模制和/或可挤出的聚合物（ENAMINE KETONE-CO-ALKYLENE ETHER）块状复合物

    公开(公告)号：US5061764A

    公开(公告)日：1991-10-29

    申请号：US368802

    申请日：1989-06-20

    申请人： Frank W. Harris ,  David D. Russell

    发明人： Frank W. Harris ,  David D. Russell

    IPC分类号： B29C67/24 ,  C08F283/06

    CPC分类号： B29C67/246 ,  C08F283/06

    摘要： A moldable and/or extrudable poly(enamine ketone-co-alkylene ether) block copolymer is disclosed which has the formula shown below: ##STR1## wherein R' is H or alkyl, alkoxyl, cycloalkyl, cycloalkoxyl and aryl and aryloxyl, A is a poly(enamine ketone) sequence and B is a polyalkylene ether sequence. The poly(enamine ketone-co-alkylene ether) block copolymer is preferably prepared under mild condition by reacting a bispropynone with an amine-terminated poly(alkylene ether); a bispropynone with an organic diamine and an amine-terminated poly(alkylene ether); or by reacting a preformed propynone-terminated poly(enamine ketone) with an amine-terminated poly(alkylene ether).The compolymers have excellent mechanical properties, are moldable and extrudable and are useful for the manufacture of articles such as films, sheaths, fibers for textile products, and other moldable and/or extrudable articles and RIM shaping. These materials are also useful as bonded or welded linings and as hot-melt adhesives.

    摘要翻译： 公开了可模制和/或可挤出的聚（烯胺酮 - 共 - 亚烷基醚）嵌段共聚物，其具有如下所示的结构式：其中R'是H或烷基，烷氧基，环烷基，环烷氧基和芳基和芳氧基，A是 聚（烯胺酮）序列，B是聚亚烷基醚序列。 聚（烯胺酮 - 共 - 亚烷基醚）嵌段共聚物优选通过使双丙炔与胺封端的聚（亚烷基醚）反应而在温和条件下制备; 具有有机二胺和胺封端的聚（亚烷基醚）的双丙炔酮; 或通过使预先形成的丙烯酮封端的聚（烯胺酮）与胺封端的聚（亚烷基醚）反应。 共聚物具有优异的机械性能，可模塑和可挤出，并且可用于制造制品，例如薄膜，护套，纺织品的纤维，以及其它可模压和/或可挤压制品和RIM成型。 这些材料也可用作粘合或焊接衬里和热熔粘合剂。

    Electrosurgical generator
    48.
    发明授权
    Electrosurgical generator 失效
    电外科发生器

    公开(公告)号：US4658819A

    公开(公告)日：1987-04-21

    申请号：US531758

    申请日：1983-09-13

    申请人： Frank W. Harris ,  Frederick M. Hulett

    发明人： Frank W. Harris ,  Frederick M. Hulett

    IPC分类号： A61B18/12 ,  A61B17/36

    CPC分类号： A61B18/1206 ,  A61B2018/00702 ,  A61B2018/00779 ,  A61B2018/00827 ,  A61B2018/00875 ,  A61B2018/00892

    摘要： An electrosurgical generator having a source of electrosurgical energy connected to a patient and including control circuitry for decreasing the output power from the source with increasing patient impedance, the rate of power decrease being substantially greater than that which would result if the output voltage from the source were maintained constant over the range of increasing patient impedance. The control circuitry may, in particular, decrease the output power over the range of increasing patient impedance in accordance with the square of the impedance.

    摘要翻译： 一种电外科发生器，其具有连接到患者的电外科能量源，并且包括控制电路，用于随着患者阻抗的增加而减小来自源的输出功率，功率降低速率基本上大于如果来自源的输出电压 在增加患者阻抗的范围内保持恒定。 特别地，根据阻抗的平方，控制电路可以在增加患者阻抗的范围内降低输出功率。

    Contact area measurement apparatus for use in electrosurgery
    49.
    发明授权
    Contact area measurement apparatus for use in electrosurgery 失效
    用于电外科的接触面积测量装置

    公开(公告)号：US4200104A

    公开(公告)日：1980-04-29

    申请号：US852431

    申请日：1977-11-17

    申请人： Frank W. Harris

    发明人： Frank W. Harris

    IPC分类号： A61B18/00 ,  A61B18/16 ,  G01B7/32 ,  A61B17/36 ,  A61N3/00

    CPC分类号： A61B18/16 ,  G01B7/32

    摘要： Patient contact area measurement method and apparatus including a first electroconductive contact element adapted for contact with the patient; a second electroconductive contact element separated from the first contact element and also adapted for contact with the patient; and measuring circuitry disposed between the first and second electroconductive contact elements for measuring the area of contact of the patient with respect to the contact elements. The electroconductive contact elements may comprise (a) each electrode of a split electrosurgical patient electrode, (b) the active and patient electrodes employed in electrosurgery or (c) a cryosurgical probe together with a monitor electrode adapted for contact with the patient.

    摘要翻译： 患者接触面积测量方法和设备包括适于与患者接触的第一导电接触元件; 与第一接触元件分离并且还适于与患者接触的第二导电接触元件; 以及设置在第一和第二导电接触元件之间的测量电路，用于测量患者相对于接触元件的接触面积。 导电接触元件可以包括（a）分裂电外科患者电极的每个电极，（b）用于电外科的活动和患者电极，或（c）冷冻手术探针以及适于与患者接触的监测电极。