公开(公告)号：US20060079595A1

公开(公告)日：2006-04-13

申请号：US10963974

申请日：2004-10-13

申请人： David Schroeder ,  Jordan Freedman ,  James Gunter ,  Brian Salyer ,  H. Hawkins

发明人： David Schroeder ,  Jordan Freedman ,  James Gunter ,  Brian Salyer ,  H. Hawkins

IPC分类号： C08J3/28 ,  C08F110/02

CPC分类号： A61F2/3094 ,  A61F2/30 ,  A61L27/16 ,  B29C47/0021 ,  B29C47/54 ,  B29C47/8805 ,  B29C55/30 ,  B29C2035/085 ,  B29K2023/0683 ,  B29K2105/25 ,  C08F110/02 ,  C08L23/06 ,  C08F2500/01 ,  C08F2500/11

摘要： Solid-state deformation processing of crosslinked high molecular weight polymers such as UHMWPE, for example by extrusion below the melt transition, produces materials with a combination of high tensile strength and high oxidative stability. The materials are especially suitable for use as bearing components in artificial hip and other implants. Treated bulk materials are anisotropic, with enhanced strength oriented along the axial direction. The material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted crosslinked UHMWPE.

公开(公告)号：US20070170042A1

公开(公告)日：2007-07-26

申请号：US11334979

申请日：2006-01-18

申请人： Raymond Foster ,  Daniel Jackson ,  Brian Salyer

发明人： Raymond Foster ,  Daniel Jackson ,  Brian Salyer

IPC分类号： B65G25/04

CPC分类号： B65G25/065

摘要： An elongated plastic slide bearing (10) comprises a top (30), sidewalls (32, 34) depending from the top (30), and connecting to walls (36, 44, 48 and 38, 46, 50) that form laterally inwardly extending recesses (40, 42). Lock ribs (62, 64) extend upwardly and inwardly from the inner walls (44, 46) of the recesses (40, 42) to upper edges (66, 68). The upper edges (66, 68) are spaced below the bearing top (30). The bearing (10) is adapted to be set down onto a support beam (14) that includes laterally outwardly projecting lock flanges (22, 24) at its top. The lock ribs (62, 64) contact the lock flanges (22, 24). When the bearing (10) is pushed downwardly, the lock ribs (62, 64) bend outwardly and allow the lock ribs (62, 64) to move into a position below the lock flanges (22, 24). When that happens, the lock ribs (62, 64) assume substantially unstressed positions in which their upper edges (66, 68) are below the lock flanges (22, 24). The sidewalls (32, 34) and the lock ribs (62, 64) are bendable to allow a floor slat (12) to be snap-fit down onto the bearing (10).

摘要翻译： 细长的塑料滑动轴承（10）包括顶部（30），从顶部（30）悬垂的侧壁（32,34），并且连接到形成横向内侧的壁（36,44,48和38,46,50） 延伸的凹部（40,42）。 锁定肋（62,64）从凹部（40,42）的内壁（44,46）向上和向内延伸到上边缘（66,68）。 上边缘（66,68）在轴承顶部（30）下方间隔开。 轴承（10）适于被放置在支撑梁（14）上，支撑梁（14）在其顶部包括侧向向外突出的锁定凸缘（22,24）。 锁定肋（62,64）与锁定凸缘（22,24）接触。 当轴承（10）向下推动时，锁定肋（62,64）向外弯曲并允许锁定肋（62,64）移动到锁定凸缘（22,24）下方的位置。 当这种情况发生时，锁定肋（62,64）呈现基本上无应力的位置，在该位置上，它们的上边缘（66,68）在锁定凸缘（22,24）下方。 侧壁（32,34）和锁定肋（62,64）可弯曲以允许底板（12）卡扣配合到轴承（10）上。

公开(公告)号：US20060258767A1

公开(公告)日：2006-11-16

申请号：US11402561

申请日：2006-04-12

申请人： David Schroeder ,  Jordan Freedman ,  James Gunter ,  Brian Salyer ,  H. Hawkins

发明人： David Schroeder ,  Jordan Freedman ,  James Gunter ,  Brian Salyer ,  H. Hawkins

IPC分类号： C08J3/28

CPC分类号： C08J3/28

摘要： Solid-state deformation processing of crosslinked high molecular weight polymers such as UHMWPE, for example by extrusion below the melt transition, produces materials with a desirable combination of physical and chemical properties. Crosslinked bulk materials are heated to a compression deformable temperature, and pressure is applied to change a transverse dimension of the material. After cooling and stress relieving, a treated bulk material is obtained that has enhanced tensile strength in the axial direction orthogonal to the dimension change. In preferred embodiments, medical implant bearing materials are machined from the treated bulk material with the in vivo load bearing axis substantially parallel or coincident with the axial direction of the treated bulk material.

公开(公告)号：US20060079596A1

公开(公告)日：2006-04-13

申请号：US10963975

申请日：2004-10-13

申请人： David Schroeder ,  Jordan Freedman ,  James Gunter ,  Brian Salyer ,  H. Hawkins

发明人： David Schroeder ,  Jordan Freedman ,  James Gunter ,  Brian Salyer ,  H. Hawkins

IPC分类号： C08J3/28

CPC分类号： C08J3/24 ,  A61F2/3094 ,  A61F2/34 ,  A61L27/16 ,  B29C47/0016 ,  B29C47/003 ,  B29C47/884 ,  B29C55/30 ,  B29K2023/0683 ,  B29K2623/0683 ,  B29L2031/7532 ,  C08J2323/06 ,  C08L23/06

摘要： A radiation crosslinked (50 kGy), pressure-treated UHMWPE material has been developed by applying compressive force on a crosslinked polymer in a direction orthogonal to an axial direction. The deformed material is then cooled while held in a deformed state. The resulting material is anisotropic, with enhanced strength oriented along the axial direction. The directionally engineered material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted highly crosslinked UHMWPEs.

摘要翻译： 已经通过在与轴向正交的方向上对交联聚合物施加压缩力来开发经辐射交联（50kGy）的经加压处理的UHMWPE材料。 然后将变形的材料冷却，同时保持在变形状态。 所得到的材料是各向异性的，具有沿轴向取向的增强强度。 即使在含有五个大气压的氧气的压力容器（ASTM F2003）中，即使在加速老化四周之后，定向工程材料也是氧化稳定的。 由于其氧化稳定性，变形处理材料是透气包装和气体灭菌的合适的候选物，迄今为止，这已经被保留用于重熔的高度交联的UHMWPE。