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公开(公告)号：US5236449A
公开(公告)日：1993-08-17
申请号：US888872
申请日：1992-05-26
IPC分类号： A61F2/24
CPC分类号： A61F2/2403
摘要： Prosthetic heart valves having a single occluder, or a pair of identical mating occluders, guided in their movement from the open to the closed position by pairs of elongated slots in diametrically opposed flat sidewall sections of the valve body. Each occluder is formed with two ears that protrude from opposite flat side surfaces along the lateral edges thereof. The ears may be frustoconical or hemispherical or the like and are slidingly received in elongated slots which can be straight or arcuate. The main body portions of the occluders have rectilinear surfaces that are aligned parallel to the centerline through the valve in the open position, so as to give low resistance to blood flow. However, when the backflow of blood displaces the occluders upstream, the slot arrangements are such that even though the occluder bodies are parallel, pivoting towards the closed position orientation begins essentially immediately, and the closing movement is of short duration so as to minimize regurgitation.
摘要翻译： 具有单个封堵器或一对相同的配合封堵器的假体心脏瓣膜通过在阀体的直径相对的平坦侧壁部分中的成对的细长狭槽从开口向闭合位置引导。 每个封堵器形成有两个耳朵，沿着其横向边缘从相对的平坦侧表面突出。 耳朵可以是截头圆锥形或半球形等，并且可滑动地容纳在可以是直的或弓形的细长槽中。 闭塞器的主体部分具有直线表面，其在打开位置通过阀平行于中心线排列，以便给予低血流阻力。 然而，当血液回流使封堵器上游位移时，狭槽结构使得即使闭塞器体是平行的，朝向关闭位置方向的枢转基本上立即开始，并且闭合运动具有短持续时间，从而使反流最小化。
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公开(公告)号：US5192309A
公开(公告)日：1993-03-09
申请号：US837761
申请日：1992-02-18
IPC分类号： A61F2/24
CPC分类号： A61F2/2409 , A61F2/2403 , Y10T137/7875 , Y10T137/7898
摘要： Heart valves, particularly those having two identical leaflets, are shown which utilize improved pivot arrangements that create prompt response to flow reversal and minimize impact at the instant of closing. Illustrated are valves having pairs of leaflets that can assume an orientation in the fully open position that is precisely parallel to the centerline of the passageway, yet which will promptly respond upon blood flow reversal and quickly close to prevent substantial regurgitation. The ability of the leaflets to assume a precisely parallel or low energy position in the bloodstream reduces pressure drop across the valve and results in improved flow characteristics. Prompt closing movement pivoting from a parallel position is effected by creating a camming action adjacent the upstream edges of the leaflets while positively guiding the overall path of leaflet translation and rotation by interengagement at other locations spaced from the upstream edges. The pivot arrangements are particularly effective to positively guide the leaflets to assure effective closing movement regardless of momentary deviations in the dynamics of the reverse flow of blood through the valve.
摘要翻译： 心脏瓣膜，特别是具有两个相同小叶的心脏瓣膜被示出，其利用改进的枢转结构，其产生对流动反转的快速响应并且在关闭时将冲击最小化。 示出了具有成对的传单的瓣膜，其可以在完全打开位置呈现精确平行于通道的中心线的方向，但是其将迅速响应于血流反转并快速关闭以防止大量反流。 小叶在血流中呈现精确平行或低能量位置的能力降低了阀门上的压降，从而改善了流动特性。 通过在传播叶片的上游边缘附近产生凸轮作用，同时通过在与上游边缘间隔开的其它位置处的相互接合而正确地引导小叶平移和旋转的整个路径来实现从平行位置枢转的快速关闭运动。 枢轴布置特别有效地积极地引导传单以确保有效的闭合运动，而不管通过阀的反向血流的动力学的瞬时偏差。
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公开(公告)号：US5152785A
公开(公告)日：1992-10-06
申请号：US674871
申请日：1991-03-25
IPC分类号： A61F2/24
CPC分类号： A61F2/2409 , A61F2/2403
摘要： Bi-leaflet and single occluder heart valves have improved pivot arrangements that create quick valve response to flow reversal and minimize impact. Valve members or occluders, which are slidably and pivotally mounted in a heart valve body, can be aligned precisely parallel to blood flow in the open position. Lugs on the valve members engage surfaces on projections extending radially inward from flat wall sections in the valve body sidewall, and the shape and relationship of these interengaging surfaces provide prompt initial rotation, low wear and reduced impact upon closing. Laterally directed ears engage the valve body arcuate sidewall and assist in defining the path of closing movement.
摘要翻译： 双瓣和单闭塞心脏瓣膜具有改进的枢轴布置，可以对流量反转产生快速的阀响应并最小化冲击。 可滑动地和可枢转地安装在心脏瓣膜体中的阀构件或闭塞器可以精确地平行于处于打开位置的血液流动。 阀构件上的凸块接合从阀体侧壁中的平壁部分径向向内延伸的突起上的表面，并且这些相互接合的表面的形状和关系提供快速的初始旋转，低磨损和减小的关闭冲击。 侧向引导的耳朵接合阀体弓形侧壁，并协助限定关闭运动的路径。
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公开(公告)号：US5677061A
公开(公告)日：1997-10-14
申请号：US587320
申请日：1996-01-16
CPC分类号： C23C16/26 , A61L27/303 , C23C16/442 , A61F2310/00574 , Y10T428/2991 , Y10T428/30
摘要： Pure unalloyed pyrocarbons having wear resistance suitable for use in pyrocarbon-coated heart valve components and having mechanical properties, such as flexural strength and toughness, superior to commercial silicon-alloyed pyrocarbons are deposited in fluidized bed coaters. Coating conditions are carefully controlled so as to maintain a precise bed size within a defined coating enclosure which will assure a substantially constant surface deposition temperature that in turn assures deposition of homogenous unalloyed pyrocarbons having these improved mechanical properties.
摘要翻译： 具有适合用于热解碳涂层的心脏瓣膜部件并且具有优于商业硅合金热解碳的机械性能如弯曲强度和韧性的耐磨性的纯非合金热解碳沉积在流化床涂布机中。 仔细地控制涂覆条件，以便在限定的涂层外壳内保持精确的床尺寸，这将确保基本上恒定的表面沉积温度，从而确保具有这些改进的机械性能的均匀非合金热解碳的沉积。
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公开(公告)号：US5514410A
公开(公告)日：1996-05-07
申请号：US303064
申请日：1994-09-08
CPC分类号： C23C16/26 , A61L27/303 , C23C16/442 , A61F2310/00574 , Y10T428/2991 , Y10T428/30
摘要： Pure unalloyed pyrocarbons having wear resistance suitable for use in pyrocarbon-coated heart valve components and having mechanical properties, such as flexural strength and toughness, superior to commercial silicon-alloyed pyrocarbons are deposited in fluidized bed coaters. Coating conditions are carefully controlled so as to maintain a precise bed size within a defined coating enclosure which will assure a substantially constant surface deposition temperature that in turn assures deposition of homogenous unalloyed pyrocarbons having these improved mechanical properties.
摘要翻译： 具有适合用于热解碳涂层的心脏瓣膜部件并且具有优于商业硅合金热解碳的机械性能如弯曲强度和韧性的耐磨性的纯非合金热解碳沉积在流化床涂布机中。 仔细地控制涂覆条件，以便在限定的涂层外壳内保持精确的床尺寸，这将确保基本上恒定的表面沉积温度，从而确保具有这些改进的机械性能的均匀非合金热解碳的沉积。
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公开(公告)号：US5305554A
公开(公告)日：1994-04-26
申请号：US78560
申请日：1993-06-16
申请人： Michael R. Emken , Mark Seeley , David S. Wilde
发明人： Michael R. Emken , Mark Seeley , David S. Wilde
摘要： A "closed-loop" moisture control system for use in vibratory mass finishing systems. A substantially constant amount of a grinding and/or polishing slurry is maintained in a finishing reservoir of the vibratory mass finishing system by controlling the amount of such fluid flowing from a supply reservoir into the finishing reservoir, and/or the amount of such fluid flowing from the finishing reservoir into a collection reservoir. In operation, a total weight of the supply reservoir and its contents, and of the collection reservoir and its contents is monitored and, in the event there is an increase in the total weight, a control means increases the amount of polishing fluid flowing from the supply reservoir into the finishing reservoir, and/or decreases the amount of polishing fluid flowing from the finishing reservoir into the collection reservoir. Conversely, in the event there is a decrease in the total weight, the control means decreases the amount of polishing fluid flowing from the supply reservoir into the finishing reservoir, and/or increases the amount of polishing fluid flowing from the finishing reservoir into the collection reservoir.
摘要翻译： 一种用于振动质量整理系统的“闭环”湿度控制系统。 通过控制从供应储存器流入整理储存器中的这种流体的量，和/或这种流体流动的量，将基本恒定量的研磨和/或抛光浆料保持在振动质量整理系统的精加工储存器中 从整理水库进入集水库。 在操作中，监测供水库及其内容物和收集容器及其内容物的总重量，并且在总重量增加的情况下，控制装置增加从 将储存器供应到精加工储存器中，和/或减少从精加工储存器流入收集储存器的抛光流体的量。 相反，在总重量减少的情况下，控制装置减少从供应储存器流入精加工储存器的抛光流体的量，和/或增加从精加工储存器流入收集器中的抛光流体的量 水库
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公开(公告)号：US06410087B1
公开(公告)日：2002-06-25
申请号：US09431520
申请日：1999-11-01
IPC分类号： C23C1600
CPC分类号： C23C16/442
摘要： Pyrolytic carbon of extremely uniform crystalline characteristics and essentially free of discontinuities is obtained in a fluidized bed coater by creating an asymmetric recirculation of the fluidized bed within the high temperature coating chamber. Through the use of any of a variety of gas injection schemes, fluidizing/coating gas mixtures are injected through the three-dimensionally curved concave bottom surface of the coater to create a pattern where the fluidized bed ascends within about one-half of the volume of the coater and then spills over to become a descending bed in the other half.
摘要翻译： 通过在高温涂覆室内产生流化床的不对称再循环，在流化床涂布机中获得非常均匀的结晶特性并基本上不含不连续性的热解碳。 通过使用各种气体注射方案中的任何一种，流化/涂覆气体混合物通过涂布机的三维弯曲的凹底表面注入，以产生图案，其中流化床在约 涂布机，然后在另一半中溢出来成为一个下降的床。
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18.发明授权
公开(公告)号：US5328720A
公开(公告)日：1994-07-12
申请号：US965727
申请日：1992-10-23
IPC分类号： B01J8/24 , B01J8/44 , C23C16/442 , C23C16/26
CPC分类号： C23C16/442 , B01J8/1827 , B01J8/44 , Y10S118/05
摘要： A coating-fluidizing gas supply system for a flat-bottom fluidized bed coater that maintains a high degree of uniform fluidization of levitated particles for a long enough time period to coat medical-device components. The coating-fluidizing gas supply system prevents premature pyrolysis of the coating component of the gas from plugging gas-distributor holes of a flat plate at the bottom of a flat-bottom fluidized bed coater, by directing multiple gas streams uniformly against the entire undersurface of the flat gas-distributor plate, creating an overall cooling-effect on the gas-distributor plate which prevents clogging.
摘要翻译： 一种用于平底流化床涂布机的涂层流化气体供应系统，其保持悬浮颗粒的高度均匀流化足够长的时间段以涂覆医疗装置部件。 涂层流化气体供应系统通过将多个气流均匀地引导到平底流化床涂布机的整个下表面，防止气体涂层组分过早热解，从而堵塞平底流化床涂布机底部的平板气体分布器孔 平坦的气体分布板，在气体分配器板上产生整体冷却效果，防止堵塞。
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公开(公告)号：US06274191B1
公开(公告)日：2001-08-14
申请号：US08206973
申请日：1994-03-07
申请人： Michael R. Emken
发明人： Michael R. Emken
IPC分类号： C23C1652
CPC分类号： B01J8/1809 , B01J2208/0007 , B01J2208/00407 , B01J2208/00495 , B01J2208/00548 , B01J2208/0061 , B01J2208/00619 , C23C14/52 , C23C16/442
摘要： Deposition of a pyrocarbon coating of precise thickness onto one or more substrates being levitated along with a bed of particles in a fluidized bed coating enclosure is accomplished by varying the amount of hydrocarbon supplied to the bed as a part of an upward levitating flow to compensate for changes which are detected in the size of the fluidized bed. Increases and decreases in the size of the bed are detected by monitoring either the differential pressure above and below the bed or the weight of the bed, and compensating changes are made to return the bed to its desired size by changing the flow rate of hydrocarbon. For example, when a growth in bed size is detected that is not attributable to an aberration in either particle supply or withdrawal, the amount of hydrocarbon being supplied to the bed is decreased so as to cause the size of the bed to gradually return to its desired value.
摘要翻译： 通过改变作为向上浮动流的一部分供应到床的烃的量，将精确厚度的热解碳涂层沉积在与流化床涂层外壳中的颗粒床悬浮的一个或多个基底上沉积，以补偿 在流化床的尺寸上检测到的变化。 通过监测床上方和下方的压差或床的重量来检测床的尺寸的增加和减少，并且通过改变烃的流速来进行补偿改变以使床返回到其期望的尺寸。 例如，当检测到不是由于颗粒供应或抽出中的像差引起的床尺寸的增长时，供应到床的烃的量减少，以致使床的尺寸逐渐返回到其 所需值。
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20.发明授权
公开(公告)号：US5328713A
公开(公告)日：1994-07-12
申请号：US32627
申请日：1993-03-16
IPC分类号： B01J8/24 , B01J19/00 , C23C16/442 , C23C16/52
CPC分类号： B01J8/1809 , B01J19/0006 , C23C16/442 , C23C16/52 , B01J2208/00061 , B01J2208/00407 , B01J2208/00495 , B01J2208/00548 , B01J2208/00619 , B01J2219/00058 , Y10S118/05
摘要： Precise control of pyrocarbon being coated upon an object in a fluidized particle bed is achieved by monitoring the weight change of the fluidized particle bed over a period of time. Measurement of such weight change is truly representative of bed size in such a coater, which is a most important factor in achieving the desired characteristics of the pyrocarbon being deposited. By monitoring the bed size by repeatedly determining such changes in the weight, compensating adjustments are made by either adding additional particles to the bed or by changing the rate at which particles are withdrawn so that precise coating characteristics are achieved, and coatings can be deposited within very close thickness tolerances.
摘要翻译： 通过在一段时间内监测流化颗粒床的重量变化来实现涂覆在流化颗粒床中的物体上的热解碳的精确控制。 这种重量变化的测量确实代表了这种涂布机中的床尺寸，这是实现沉积的热解碳的期望特性的最重要的因素。 通过重复地确定重量的这种变化来监测床的尺寸，通过向床中添加额外的颗粒或通过改变颗粒被抽出的速率来进行补偿调节，从而实现精确的涂层特性，并且可以在 非常紧密的厚度公差。
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