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    • 81. 发明授权
    • Process for coating carbon fibers with pitch and composites made
therefrom
    • 用由其制成的沥青和复合材料涂覆碳纤维的方法
    • US5334414A
    • 1994-08-02
    • US8787
    • 1993-01-22
    • Danny D. EdieJames W. Klett
    • Danny D. EdieJames W. Klett
    • B05C19/04C04B35/83D01F11/14B05D3/02
    • B05C19/04C04B35/83D01F11/14
    • The present invention is directed to a process for coating carbon fibers with a pitch material. The process employs a pressurized air-comb for spreading a carbon fiber tow into individual carbon fiber filaments and providing the carbon fiber filaments in a spreaded tow to a powder deposition chamber. A pitch material is dried and finely ground and is then fed into the coating chamber at a point above the traveling spreaded carbon fiber tow. The pitch powder initially falls onto the fiber tow and begins forming a uniform coating around the individual carbon fibers. After falling past the point of the traveling carbon tow, the pitch powder is then recirculated back to the upper portion of the coating chamber and is entrained within a pitch powder cloud through which the threaded fiber tow travels. Fibers that are coated by such a method may be used to form carbon/carbon composites that exhibit high strength and excellent mechanical properties. The carbon fibers that are coated according to the present invention do not require the repeated multi-impregnation steps normally associated with carbon/carbon composite formation.
    • 本发明涉及用沥青材料涂覆碳纤维的方法。 该方法使用加压空气梳以将碳纤维丝束分散到单独的碳纤维长丝中,并将扩展的丝束中的碳纤维长丝提供到粉末沉积室。 将沥青材料干燥并精细研磨,然后在行进的铺展的碳纤维丝束上方的一点加入涂覆室。 沥青粉末最初落在纤维丝束上,开始在单独的碳纤维周围形成均匀的涂层。 在超过移动的碳纤维束的点之后,沥青粉末再​​循环回到涂覆室的上部,并被夹带在螺旋纤维丝束穿过的沥青粉末云中。 通过这种方法涂布的纤维可以用于形成表现出高强度和优异的机械性能的碳/碳复合材料。 根据本发明涂覆的碳纤维不需要通常与碳/碳复合物形成相关的重复多次浸渍步骤。
    • 83. 发明授权
    • Oxygenated pitch and processing same
    • 氧化沥青和加工相同
    • US5225070A
    • 1993-07-06
    • US737446
    • 1991-07-29
    • Ludovic P. CornecCharles C. Fain
    • Ludovic P. CornecCharles C. Fain
    • C10C3/04
    • C10C3/04
    • A method is provided which includes infusing oxygen into pitch material without stabilizing the oxygen-infused pitch material. In addition, the invention includes further processing steps (including heat stabilization in either an inert atmosphere or an oxygen-containing atmosphere, deformation, pyrolysis, and/or composite formation) performed after or in conjunction with the oxygenation process. Moreover, the invention includes the composition of matter (in any of a number of different physical forms such as powder, fiber, shaped article, composites) resulting from the practice of this oxygenation process, either alone or in conjunction with the further processing steps. The composition has a homogeneous distribution of oxygen and can be heat stabilized in an inert atmosphere.
    • 提供了一种方法,其包括将氧气输入到沥青材料中,而不使氧气注入的沥青材料稳定。 此外,本发明包括在氧合过程之后或与氧合过程结合进行的进一步的加工步骤(包括在惰性气氛或含氧气氛中的热稳定性,变形,热解和/或复合形成)。 此外,本发明包括单独使用或与其他加工步骤结合的由氧合过程实践产生的物质(以多种不同的物理形式,如粉末,纤维,成型制品,复合材料中的任何一种)的组成。 该组合物具有均匀的氧分布,并且可以在惰性气氛中热稳定。
    • 84. 发明授权
    • Soft tissue implant with micron-scale surface texture to optimize
anchorage
    • 具有微米级表面纹理的软组织植入物优化锚固
    • US5219361A
    • 1993-06-15
    • US928694
    • 1992-08-12
    • Andreas F. von RecumCraig E. Campbell
    • Andreas F. von RecumCraig E. Campbell
    • A61F2/00
    • A61F2/0077
    • A soft tissue implant device such as a catheter, heart valve, or plastic or reconstructive surgical material, to be at least partially embedded in an implantation site in soft organic tissue of a living organism includes a body defining a surface layer extending over the portion of the body contacting the organic tissue. The surface layer defines a three-dimensional pattern with an exterior surface defining a plurality of spaces and a plurality of solid surface portions. The spaces have a mean bridging distance ranging from greater than 1.0 micron to less than 4.0 microns and the solid surface portions have mean breadths ranging from 0.10 micron to 2.0 microns. The mean bridging distance is preferably greater than 1.4 microns and less than 1.9 microns. The exterior surface is substantially free of indentations having a bridging distance measuring in a range from between 10.0 microns and 1,000 microns.
    • 将至少部分地嵌入生物体的软质有机组织中的植入部位的软组织植入装置(例如导管,心脏瓣膜或塑料或重建手术材料)包括限定在 身体接触有机组织。 表面层限定具有限定多个空间和多个固体表面部分的外表面的三维图案。 空间的平均桥接距离大于1.0微米至小于4.0微米,固体表面部分的平均宽度范围为0.10微米至2.0微米。 平均桥接距离优选大于1.4微米且小于1.9微米。 外表面基本上没有压痕距离在10.0微米和1,000微米之间的范围内。
    • 85. 发明授权
    • Harvesting machinery
    • 收获机械
    • US5170614A
    • 1992-12-15
    • US560105
    • 1990-07-31
    • Robert E. WilliamsonCarl M. McHughClarence E. Hood
    • Robert E. WilliamsonCarl M. McHughClarence E. Hood
    • A01D46/28
    • A01D46/28
    • A harvester adapted for harvesting low-lying fruit, such as typical with high-density, dwarf trees, includes an intra-loop conveyor for collecting detached fruit relatively close to the ground and elevating same with a single flighted belt. The harvester straddles a single row of the trees and detaches the fruit therefrom by repeatedly impacting the tree canopies are the harvester moves along the row. Spring-loaded deflection plates close around the tree trunks and deflect detached fruit outwardly to interior surfaces of a pair of single-loop conveyors. Baffles cooperating with the interior of each conveyor restrains fruit therein as the conveyor passes overhead to an inverted position. Fruit is discharged from the conveyor elevated segment onto an output conveyor passing beneath the discharge area. The output conveyor includes a multi-segment, foldable conveyor frame over which a single conveyor belt is entrained. The conveyor belt may be folded over the harvester during non-harvesting transport. Canopy-impacting tines function as fruit detachment devices, and are rotatably driven in a single plane with both constant rotational and oscillatory rotational components of motion. The constant component is synchronized with vehicle forward speed to permit unimpeded feeding of trees through the harvester. The superimposed oscillatory component causes tines to sharply impact tree canopies for detaching fruit therefrom. Both the amplitude and frequency of such impacting action may be varied.
    • 适用于收获低洼水果的收割机,例如典型的高密度矮树,包括一个环路内输送机,用于收集相对靠近地面的分离的水果,并用单个飞行带将其提升。 收割机跨越一排树木,并通过反复冲击树叶分离水果,这是收割机沿着行走的移动。 弹簧加载的偏转板靠近树干,并将脱落的果实向外偏转到一对单回路输送机的内表面。 与每个输送机的内部配合的挡板当输送机通过顶部转到倒立位置时,将其中的水果约束在其中。 水果从输送机升降段排出到通过排放区域下方的输出输送机上。 输出输送机包括多段可折叠的输送机框架,单个输送带被夹带在该输送机框架上。 在非收割运输过程中,传送带可以在收割机上折叠。 扇冠冲击功能作为水果分离装置,并且在具有恒定的旋转和振荡旋转运动分量的单个平面中可旋转地驱动。 恒定部件与车辆前进速度同步,以允许通过收割机不间断地喂食树木。 叠加的振荡部分使得尖锐地影响树冠从而分离水果。 这种影响动作的幅度和频率都可以变化。
    • 87. 发明授权
    • High strength, melt spun carbon fibers and method for producing same
    • 高强度,熔融发泡碳纤维及其生产方法
    • US5149517A
    • 1992-09-22
    • US820734
    • 1986-01-21
    • Charles C. FainDanny D. Edie
    • Charles C. FainDanny D. Edie
    • D01D5/253D01F9/14D01F9/145D01F9/155D01F9/22D01F9/32
    • D01F9/14D01D5/253D01F9/155D01F9/22D01F9/32D01F9/322Y10T428/2918Y10T428/2973Y10T428/2975
    • Hollow carbon fibers and carbon fibers having a generally C-shaped transverse cross-sectional area are produced by extruding a carbonaceous anisotropic liquid precursor through a spinneret having a capillary with a generally C-shaped cross-sectional area, into a fiber filament, controlling the viscosity of the molten precursor, the pressure of the molten precursor and the linear take-up speed of the filament to yield a fiber filament having a cross-sectional area shaped substantially like the shape of the cross-sectional area of the capillary and further having a line-origin microstructure, rendering the filament infusible, heating the filament in an inert pre-carbonizing environment at a temperature in the range of 600.degree. C. to 1000.degree. C. for 1 to 5 minutes, and heating the filament in an inert carbonizing environment at a temperature in the range of 1550.degree. C. to 1600.degree. C. for 5 to 10 minutes, to substantially increase the tensile strength of the filament. The carbon fiber filament so produced has a line-origin microstructure in which the origin line is located and shaped substantially as a line which constitutes the line formed by uniformly collapsing the perimeter of the transverse cross-sectional area of the fiber filament upon itself. The carbon fiber filament has a tensile strength greater than 200 ksi and as high as the 700 to 800 ksi range, yet a modulus of elasticity on the order of 25-35 msi. The top to bottom outside diameter of the fiber's transverse cross-sectional area is on the order of 30 to 50 microns, and the wall thicknesses are on the order of 8 to 15 microns.
    • 通过将碳质各向异性液体前体通过具有大致C形横截面积的毛细管的喷丝头挤出到纤维丝中来制造具有大致C形横截面积的中空碳纤维和碳纤维,从而控制 熔融前体的粘度,熔融前体的压力和丝的线性吸收速度,以产生纤维长丝,该纤维长丝的截面积基本上类似于毛细管的横截面积的形状,并且还具有 线源微结构,使细丝不熔,在惰性预碳化环境中在600℃至1000℃的温度范围内加热丝,持续1至5分钟,并将惰性物质加热至惰性 碳化环境在1550℃至1600℃的温度下进行5至10分钟,以显着提高长丝的拉伸强度。 如此制造的碳纤维丝具有线状微结构,其中原点线基本上定位成线,该线构成通过将纤维丝的横截面积的周长均匀地折叠在其自身上而形成的线。 碳纤维长丝的拉伸强度大于200ksi,高达700至800ksi的范围,弹性模量为25-35毫秒。 纤维横向横截面积的顶部到底部的外径约为30至50微米,壁厚约为8至15微米。
    • 89. 发明授权
    • Soft tissue implants for promoting tissue adhesion to same
    • 用于促进组织粘附的软组织植入物
    • US4871366A
    • 1989-10-03
    • US198612
    • 1988-05-23
    • Andreas F. von RecumFrancis W. Cooke
    • Andreas F. von RecumFrancis W. Cooke
    • A61F2/00A61L27/30
    • A61L27/306A61F2/0077A61F2310/00407
    • A soft tissue implant comprises a flexible main body portion, having tissue-facing surfaces and a thin layer of pure titanium covering the tissue-facing surfaces. A method of promoting tissue adhesion of a soft tissue host to the tissue-facing surfaces of a soft tissue implant comprising a strip of polyethylene terephthalate velour comprises the steps of cleaning the strip with a low-residue detergent and rinsing same with fresh distilled water; refluxing the strip in distilled water for one hour at a temperature of less than 30.degree. C.; drying the strip in a room-temperature desicator for several days; sterilizing the strip and packaging same; degasing the strip and storing same in a dust-free environment; removing the strip from the packaging and mounting the strip in the vacuum evaporator at an approximate angle of incidence of 90.degree. from a pure titanium metal evaporant; evacuating the vacuum evaporator to a vacuum of about 2.times.10.sup.-5 Torr; evaporating the titanium by direct resistance heating same; coating the strip with a layer of pure titanium on the order of one micron thick; and resterilizing and implanting the titanium-coated strip into the tissue host.
    • 软组织植入物包括具有面向组织的表面的柔性主体部分和覆盖面向组织的表面的纯钛薄层。 促进软组织宿主组织粘附到包括聚对苯二甲酸乙二醇酯丝绒条的软组织植入物的面向组织的表面的方法包括用低残留洗涤剂清洗条并用新鲜蒸馏水冲洗的步骤; 在低于30℃的温度下将条带在蒸馏水中回流1小时。 在室温干燥器中干燥条数天; 对条带进行消毒和包装; 在无尘环境下对带材进行脱胶并将其储存; 从包装中取出条带,并将该条带放置在真空蒸发器中,与纯钛金属蒸发器的入射角约为90°; 将真空蒸发器抽真空至约2×10 -5乇的真空度; 通过直接电阻加热蒸发钛; 用一层厚度的一层纯钛涂层条; 并将钛涂层的条再生并植入组织宿主体内。
    • 90. 发明授权
    • Method and apparatus for controlling impact force during rapid robotic
acquisition of object
    • 用于在物体快速自动获取过程中控制冲击力的方法和装置
    • US4783107A
    • 1988-11-08
    • US120755
    • 1987-11-12
    • Joey K. ParkerFrank W. Paul
    • Joey K. ParkerFrank W. Paul
    • B25J13/08B25J15/00B25J15/02B66C1/00
    • B25J15/0253B25J13/082B25J15/0004Y10S294/907
    • Proximity sensors are used to sense impending contact, i.e., a point of close approach, between a finger of a robot hand and an object. Each finger is equipped with force sensors so that finger touch force with the object can be measured and controlled. The hand is controlled by a dedicated microprocessor, which communicates with a robot arm controller through 8 digital input/output lines. A novel "bi-modal" control system uses information from the proximity sensors to control both solenoid (on/off) valves and a proportional servovalve which are alternatively switched into an operative mode in a pneumatic circuit which powers the pneumatic actuators of the hand. This control design achieves the two goals of rapid object acquisition and low interaction forces. Each finger of the hand is capable of implementing an acquisition strategy in which mislocated objects can be acquired.
    • 接近传感器用于感测机器人手的手指与物体之间的即将接触,即紧密接近的点。 每个手指配备有力传感器,从而可以测量和控制与物体的手指触摸力。 手由一个专用微处理器控制,通过8个数字输入/输出线与机器人手臂控制器进行通讯。 一种新颖的“双模式”控制系统使用来自接近传感器的信息来控制螺线管(开/关)阀和比例伺服阀,该比例伺服阀在为手的气动致动器供电的气动回路中交替切换到操作模式。 该控制设计实现了快速物体采集和低相互作用力的两个目标。 手的每个手指能够实现可以获取错位对象的获取策略。