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    • 94. 发明授权
    • Heart pump
    • 心脏泵
    • US5344443A
    • 1994-09-06
    • US946381
    • 1992-09-17
    • Rodolfo PalmaWilliam H. Miller
    • Rodolfo PalmaWilliam H. Miller
    • A61M1/10A61M1/12F04D3/02F04D13/06H02K5/12H02K5/167H02K5/22H02K7/14H02K11/00H02K21/46A61N1/362
    • A61M1/1031A61M1/101F04D13/0673F04D3/02H02K11/01H02K11/33H02K21/46H02K5/1677H02K5/225H02K7/14H02K2205/03H02K5/12
    • A heart pump having a housing with a central longitudinal axis, inlet means and an outlet means is disclosed. A stationary shaft extends axially within the housing and the means are provided for supporting the shaft centrally located within the housing. A stator assembly is mounted about the stationary shaft and a shell assembly is rotatable about the stator assembly and shaft. The shell assembly is located between the housing and stator assembly and includes a spiral ridge located on the outerside thereof for pumping blood through the housing between the housing and shell assembly as the shell assembly rotates. Rotor laminations are located on an innerside of the shell assembly. The rotor laminations have a plurality of axially extending permanent magnets therebetween which are circumferentially spaced about the stationary shaft. A damper winding means is mounted within the rotor laminations. Blood may flow between the shell assembly and housing without exposure to magnetic fields.
    • 公开了具有具有中心纵向轴线的壳体,入口装置和出口装置的心脏泵。 固定轴在壳体内轴向延伸,并且提供用于将轴支撑在壳体内的中心的装置。 定子组件围绕固定轴安装,壳体组件可围绕定子组件和轴转动。 壳体组件位于壳体和定子组件之间,并且包括位于其外侧的螺旋脊,其用于在壳体组件旋转时将血液通过外壳和外壳组件之间的壳体泵送。 转子叠片位于壳体组件的内侧。 转子叠片在它们之间具有多个轴向延伸的永磁体,它们围绕固定轴周向间隔开。 减震器绕组装置安装在转子叠片内。 血液可能在壳体组件和壳体之间流动,而不会暴露于磁场。
    • 95. 发明授权
    • Die assembly control
    • 模具组装控制
    • US5219588A
    • 1993-06-15
    • US797636
    • 1991-11-25
    • Todd A. EnglandWilliam H. Miller
    • Todd A. EnglandWilliam H. Miller
    • B29C47/00B29C47/26B29C47/56B29C47/74
    • B29C47/0035B29C47/003B29C47/26B29C47/56B29C47/70B29C47/74B29C47/025
    • A die assembly (10) for controlling extrudate profile dimension. The die assembly includes a die block (12) having a feed passage (16) for movably supporting a diverter member (13) within the die block, and first and second die block passages (18, 20). The diverter member (13) includes a diverter passage (32) and first and second feed openings (34, 36) interconnected by the diverter passage. One of the first or second feed openings (34, 36) has a larger diameter than the other of the first or second feed openings. The diverter member (13) is movable with respect to the die block (12) for directing extrudate flow via the diverter passage (32) through the second die block passage (20), to thereby vary the profile dimension of the extrudate exiting the die block. The die block (12) additionally includes a disposal passage (22). Movement of the diverter member (13) within the die block is provided between a first position providing communication between the first and second die block passages ( 18, 20), and a second position providing communication between the first die block passage (18) and the disposal passage (22). A die plate (14) may be readily changed by directing extrudate flow via the disposal passage (22).
    • 一种用于控制挤出物型材尺寸的模具组件(10)。 模具组件包括具有用于可移动地支撑模块内的转向构件(13)的进给通道(16)的模块(12)以及第一和第二模块通道(18,20)。 分流器构件(13)包括分流器通道(32)和通过分流器通道互连的第一和第二进料口(34,36)。 第一或第二进料口(34,36)中的一个具有比第一或第二进料口中另一个更大的直径。 分流器构件(13)可相对于模具块(12)移动,用于通过分流器通道(32)引导挤出物通过第二模具块通道(20),从而改变离开模具的挤出物的轮廓尺寸 块。 模块(12)还包括处置通道(22)。 分流器构件(13)在模具块内的运动设置在提供第一和第二模块通道(18,20)之间的连通的第一位置和第二位置之间,提供第一模块通道(18)和 处置通道(22)。 通过经由处置通道(22)引导挤出物流可以容易地改变模板(14)。
    • 97. 发明授权
    • Crack detection method for operating shaft
    • 用于操作轴的裂纹检测方法
    • US5159563A
    • 1992-10-27
    • US585884
    • 1990-09-19
    • William H. MillerWarren R. Brook
    • William H. MillerWarren R. Brook
    • G01H17/00G01H13/00G01M13/02G01N3/32G01N29/12G21C17/00
    • G01H13/00G01N29/12G01N2291/2693
    • The presence, size and location of a crack in a shaft is determined by comparing actual measured natural frequencies of the operating shaft system with the results of an analytical model. From a multi-station analytical model of an uncracked operating shaft system, natural frequencies and associated mode shapes are derived. A suspected axial location of a crack is defined, and a natural frequency of interest is selected which has an associated mode shape exhibiting significant localized bending at the suspected axial location of the crack and at a site of response measurement. The analytical model is modified to include a representation of an asymmetric crack at the suspected crack location. A predicted split and downward shift of a lateral natural frequency of interest as a function of crack depth and/or a predicted downward shift of a torsional natural frequency of interest as a function of crack depth is calculated from the modified model. The actual shaft system is subjected to an operating force excitation, and vibrational response measurements are taken with strain gages and then output through a short range telemetry system. A fast Fourier transform analyzer derives frequency response spectra from the measurements which indicate the actual natural frequencies of the shaft system. A comparison of actual natural frequency(s) in the region near the natural frequency of interest with frequency values predicted by the modified model is employed to determine the presence and severity of a crack in the shaft.
    • 通过将操作轴系统的实际测量固有频率与分析模型的结果进行比较来确定轴中裂纹的存在,尺寸和位置。 从一个未裂缝的操作轴系统的多工位分析模型,推导出固有频率和相关模式形状。 确定裂纹的可疑轴向位置,并且选择感兴趣的固有频率,其具有在裂纹的可疑轴向位置处和在响应测量位置处显示出显着的局部弯曲的相关模式形状。 分析模型被修改为包括在可疑裂缝位置处的不对称裂纹的表示。 根据修改的模型计算作为裂纹深度的函数的感兴趣的侧向固有频率和/或作为裂纹深度的函数的感兴趣的扭转固有频率的预测的向下偏移的预测的分裂和向下移位。 实际轴系受到操作力激励,应变计采用振动响应测量,然后通过短距离遥测系统输出。 快速傅立叶变换分析仪从测量中得出频率响应谱,表明轴系的实际固有频率。 采用在修正模型预测的频率值附近的感兴趣自然频率附近的实际固有频率的比较来确定轴中裂纹的存在和严重程度。