专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5453235A Method of forming dual porosity FTFE tubes by extrusion of concentric preforms 失效
标题翻译：通过挤出同心预制件形成双孔PTFE管的方法
公开(公告)号：US5453235A
公开(公告)日：1995-09-26
申请号：US10974
申请日：1993-01-29
申请人： Robert W. Calcote , Rajagopal R. Kowligi , Stacy Wollner
发明人： Robert W. Calcote , Rajagopal R. Kowligi , Stacy Wollner
IPC分类号： A61F2/06 , A61L27/16 , A61L27/56 , A61M25/00 , B29C47/00 , B29C47/06 , B29C47/54 , B29C55/00 , B29C55/22
CPC分类号： B29C47/54 , A61L27/16 , A61L27/56 , B29C47/0004 , B29C47/0023 , B29C47/065 , B29C47/26 , B29C55/30 , A61F2/06 , A61M2025/0062 , A61M25/0009 , B29C55/00 , B29K2027/18 , B29L2031/7534 , B29L2031/7542 , Y10T428/139 , Y10T428/1393 , Y10T428/249981 , Y10T428/31544
摘要： A dual porosity PTFE tube including an inner surface of expanded PTFE material having a first porosity and an outer surface of expanded PTFE material having a porosity different from that of the inner surface. The preferred method includes the step of forming inner and outer preformed tubular billets of PTFE resin particles mixed with a lubricant; the outer billet is adapted to closely fit around and concentric to the inner billet. Porosity of the inner and outer surfaces is varied by changing, in the respective billets, the lubrication level and/or the PTFE resin characteristic average particle size. The inner billet is placed inside the outer billet, and the two are extruded together, thereby melding the two billets. The extrudate is then longitudinally expanded and sintered. The inner surface of the resulting PTFE tube exhibits a different porosity than the outer surface of the tube; the porosities of the inner and outer surfaces are both within a range of about 0.10-200.mu..
摘要翻译：一种双孔PTFE管，其包括具有第一孔隙率的膨胀PTFE材料的内表面和具有不同于内表面的孔隙率的膨胀PTFE材料的外表面。优选的方法包括形成与润滑剂混合的PTFE树脂颗粒的内部和外部预制管状坯料的步骤; 外部坯料适于紧密地配合并且与内部坯料同心。通过在相应的坯料中改变润滑水平和/或PTFE树脂特征平均粒径来改变内表面和外表面的孔隙率。将内部坯料放置在外部坯料内部，将两个坯料挤压在一起，从而使两个坯料熔合。然后将挤出物纵向膨胀并烧结。所得PTFE管的内表面与管的外表面具有不同的孔隙率; 内表面和外表面的孔隙率都在约0.10-200μm的范围内。

2. 发明授权

US5935667A Dual porosity PTFE tubes 失效
标题翻译：双孔PTFE管
公开(公告)号：US5935667A
公开(公告)日：1999-08-10
申请号：US872093
申请日：1997-06-10
申请人： Robert Calcote , Rajagopal R. Kowligi , Stacy Wollner
发明人： Robert Calcote , Rajagopal R. Kowligi , Stacy Wollner
IPC分类号： A61F2/06 , A61L27/16 , A61L27/56 , A61M25/00 , B29C47/00 , B29C47/06 , B29C47/54 , B29C55/00 , B29D23/00
CPC分类号： B29C47/54 , A61L27/16 , A61L27/56 , B29C47/0004 , B29C47/0023 , B29C47/065 , B29C47/26 , B29C55/30 , A61F2/06 , A61M2025/0062 , A61M25/0009 , B29C55/00 , B29K2027/18 , B29L2031/7534 , B29L2031/7542 , Y10T428/139 , Y10T428/1393 , Y10T428/249981 , Y10T428/31544
摘要： A dual porosity PTFE tube including an inner surface of expanded PTFE material having a first porosity and an outer surface of expanded PTFE material having a porosity different from that of the inner surface. The preferred method includes the step of forming inner and outer preformed tubular billets of PTFE resin particles mixed with a lubricant; the outer billet is adapted to closely fit around and concentric to the inner billet. Porosity of the inner and outer surfaces is varied by changing, in the respective billets, the lubrication level and/or the PTFE resin characteristic average particle size. The inner billet is placed inside the outer billet, and the two are extruded together, thereby melding the two billets. The extrudate is then longitudinally expanded and sintered. The inner surface of the resulting PTFE tube exhibits a different porosity than the outer surface of the tube; the porosities of the inner and outer surfaces are both within a range of about 0.10-200 .mu..
摘要翻译：一种双孔PTFE管，其包括具有第一孔隙率的膨胀PTFE材料的内表面和具有不同于内表面的孔隙率的膨胀PTFE材料的外表面。优选的方法包括形成与润滑剂混合的PTFE树脂颗粒的内部和外部预制管状坯料的步骤; 外部坯料适于紧密地配合并且与内部坯料同心。通过在相应的坯料中改变润滑水平和/或PTFE树脂特征平均粒径来改变内表面和外表面的孔隙率。将内部坯料放置在外部坯料内部，将两个坯料挤压在一起，从而使两个坯料熔合。然后将挤出物纵向膨胀并烧结。所得PTFE管的内表面与管的外表面具有不同的孔隙率; 内表面和外表面的孔隙率都在约0.10-200μm的范围内。

3. 发明授权

US5641443A Method of forming dual porosity PTFE tubes by extrusion of concentric preforms 失效
标题翻译：通过挤出同心预制件形成双孔PTFE管的方法
公开(公告)号：US5641443A
公开(公告)日：1997-06-24
申请号：US459545
申请日：1995-06-02
申请人： Robert Calcote , Rajagopal R. Kowligi , Stacy Wollner
发明人： Robert Calcote , Rajagopal R. Kowligi , Stacy Wollner
IPC分类号： A61F2/06 , A61L27/16 , A61L27/56 , A61M25/00 , B29C47/00 , B29C47/06 , B29C47/54 , B29C55/00 , B29C55/22
CPC分类号： B29C47/54 , A61L27/16 , A61L27/56 , B29C47/0004 , B29C47/0023 , B29C47/065 , B29C47/26 , B29C55/30 , A61F2/06 , A61M2025/0062 , A61M25/0009 , B29C55/00 , B29K2027/18 , B29L2031/7534 , B29L2031/7542 , Y10T428/139 , Y10T428/1393 , Y10T428/249981 , Y10T428/31544
摘要： A dual porosity PTFE tube including an inner surface of expanded PTFE material having a first porosity and an outer surface of expanded PTFE material having a porosity different from that of the inner surface. The preferred method includes the step of forming inner and outer preformed tubular billets of PTFE resin particles mixed with a lubricant; the outer billet is adapted to closely fit around and concentric to the inner billet. Porosity of the inner and outer surfaces is varied by changing, in the respective billets, the lubrication level and/or the PTFE resin characteristic average particle size. The inner billet is placed inside the outer billet, and the two are extruded together, thereby melding the two billets. The extrudate is then longitudinally expanded and sintered. The inner surface of the resulting PTFE tube exhibits a different porosity than the outer surface of the tube; the porosities of the inner and outer surfaces are both within a range of about 0.10-200 .mu..
摘要翻译：一种双孔PTFE管，其包括具有第一孔隙率的膨胀PTFE材料的内表面和具有不同于内表面的孔隙率的膨胀PTFE材料的外表面。优选的方法包括形成与润滑剂混合的PTFE树脂颗粒的内部和外部预制管状坯料的步骤; 外部坯料适于紧密地配合并且与内部坯料同心。通过在相应的坯料中改变润滑水平和/或PTFE树脂特征平均粒径来改变内表面和外表面的孔隙率。将内部坯料放置在外部坯料内部，将两个坯料挤压在一起，从而使两个坯料熔合。然后将挤出物纵向膨胀并烧结。所得PTFE管的内表面与管的外表面具有不同的孔隙率; 内表面和外表面的孔隙率都在约0.10-200μm的范围内。

4. 发明授权

US08337650B2 Methods for making a supported graft 失效
标题翻译：制作支撑移植物的方法
公开(公告)号：US08337650B2
公开(公告)日：2012-12-25
申请号：US13434472
申请日：2012-03-29
申请人： Tarun J. Edwin , Rajagopal R. Kowligi , Brendan McCrea , Christopher E. Banas
发明人： Tarun J. Edwin , Rajagopal R. Kowligi , Brendan McCrea , Christopher E. Banas
IPC分类号： B32B37/00
CPC分类号： A61F2/88 , A61F2/0077 , A61F2/06 , A61F2/07 , A61F2/82 , A61F2/86 , A61F2002/072 , A61F2002/075 , A61F2002/30093 , A61F2002/30448 , A61F2210/0019 , A61F2210/0076 , A61F2220/005 , A61L31/048 , C08L27/18
摘要： A method for forming a self-expanding stent-graft, including coupling a shape memory member to a polymer cladding to form a polymer clad member, disposing a length of the polymer clad member in an overlapping helical manner about a longitudinal axis, joining and sealing adjacent overlapping regions of the polymer clad member to form a stent-graft, manipulating the stent-graft from a first diameter to a second diameter smaller than the first diameter, and loading the stent-graft into a restraining sheath at the second diameter, the restraining sheath preventing expansion of the stent-graft from the second diameter to the first diameter.
摘要翻译：一种形成自扩张型支架移植物的方法，包括将形状记忆元件耦合到聚合物包层以形成聚合物包覆部件，将一段长度的聚合物包覆部件以围绕纵向轴线的重叠螺旋方式设置，接合和密封聚合物包覆部件的相邻重叠区域以形成支架移植物，将支架移植物从第一直径操纵至小于第一直径的第二直径，并将支架移植物装载到第二直径的约束护套中，限制护套防止支架移植物从第二直径扩展到第一直径。

5. 发明授权

US5512229A Process of uniformly expanding polymer film 失效
标题翻译：聚合物膜均匀膨胀的工艺
公开(公告)号：US5512229A
公开(公告)日：1996-04-30
申请号：US248606
申请日：1994-05-25
申请人： Charles F. Bosse , Rajagopal R. Kowligi
发明人： Charles F. Bosse , Rajagopal R. Kowligi
IPC分类号： B29C55/10 , B29C55/00 , B29C55/20
CPC分类号： B29C55/10 , B29K2027/18 , Y10S425/053 , Y10S428/91
摘要： An apparatus and process for expanding polymer films such as PTFE films includes gripping the unexpanded film about its periphery with a number of symmetrically disposed gripping members each equidistant from the center of the film. The gripping members are simultaneously rotated through an arc away from the center of the film, as by pivotally securing each gripping member to the end of an associated expansion arm and rotating the end of each expansion arm away from the center of the film while maintaining the gripping members equidistant from the center of the film. The expansion arms are uniformly rotated by a geared shaft powered by a drive mechanism that extends through the wall of an oven for coupling to an external motor. Also disclosed is an expanded PTFE film made in accordance with such process.
摘要翻译：用于膨胀诸如PTFE膜的聚合物膜的装置和方法包括用与膜的中心等距的多个对称设置的夹持构件夹持其周边的未膨胀膜。夹持构件同时通过远离膜的中心的弧旋转，如通过将每个夹持构件枢转地固定到相关联的膨胀臂的端部并将每个膨胀臂的端部远离膜的中心旋转，同时保持夹紧构件与电影中心等距。膨胀臂由驱动机构驱动的齿轮轴均匀地旋转，驱动机构延伸穿过炉的壁连接到外部电动机。还公开了根据这种方法制成的膨胀PTFE薄膜。

6. 发明申请

US20120193018A1 Methods for Making a Supported Graft 失效
标题翻译：制作支持移植的方法
公开(公告)号：US20120193018A1
公开(公告)日：2012-08-02
申请号：US13434472
申请日：2012-03-29
申请人： Christopher E. Banas , Tarun J. Edwin , Brendan J. McCrea , Rajagopal R. Kowligi
发明人： Christopher E. Banas , Tarun J. Edwin , Brendan J. McCrea , Rajagopal R. Kowligi
IPC分类号： B32B37/14 , B32B38/00
CPC分类号： A61F2/88 , A61F2/0077 , A61F2/06 , A61F2/07 , A61F2/82 , A61F2/86 , A61F2002/072 , A61F2002/075 , A61F2002/30093 , A61F2002/30448 , A61F2210/0019 , A61F2210/0076 , A61F2220/005 , A61L31/048 , C08L27/18
摘要： A method for forming a self-expanding stent-graft, including coupling a shape memory member to a polymer cladding to form a polymer clad member, disposing a length of the polymer clad member in an overlapping helical manner about a longitudinal axis, joining and sealing adjacent overlapping regions of the polymer clad member to form a stent-graft, manipulating the stent-graft from a first diameter to a second diameter smaller than the first diameter, and loading the stent-graft into a restraining sheath at the second diameter, the restraining sheath preventing expansion of the stent-graft from the second diameter to the first diameter.
摘要翻译：一种形成自扩张型支架移植物的方法，包括将形状记忆元件耦合到聚合物包层以形成聚合物包覆部件，将一段长度的聚合物包覆部件以围绕纵向轴线的重叠螺旋方式设置，接合和密封聚合物包覆部件的相邻重叠区域以形成支架移植物，将支架移植物从第一直径操纵至小于第一直径的第二直径，并将支架移植物装载到第二直径的约束护套中，限制护套防止支架移植物从第二直径扩展到第一直径。

7. 发明授权

US06790226B2 Endoluminal prosthesis with support wire 失效
标题翻译：带支撑线的腔内假体
公开(公告)号：US06790226B2
公开(公告)日：2004-09-14
申请号：US09858035
申请日：2001-05-15
申请人： Tarun J. Edwin , Rajagopal R. Kowligi , Brendan J. McCrea , Christopher E. Banas
发明人： Tarun J. Edwin , Rajagopal R. Kowligi , Brendan J. McCrea , Christopher E. Banas
IPC分类号： A61F206
CPC分类号： A61F2/88 , A61F2/0077 , A61F2/06 , A61F2/07 , A61F2/82 , A61F2/86 , A61F2002/072 , A61F2002/075 , A61F2002/30093 , A61F2002/30448 , A61F2210/0019 , A61F2210/0076 , A61F2220/005 , A61L31/048 , C08L27/18
摘要： An endoluminal prosthesis for implantation within a body lumen to maintain luminal patency, including a support structure and a polymer component, which may be in the form of a wire member joined to a polymer cladding. The support structure may be formed of shape memory alloys, which exhibit either shape memory or pseudoelastic properties, or from an elastic material having an inherent spring tension such as spring steel, braided stainless steel wire, or composite materials, such as woven or braided carbon fibers. The polymer cladding may be formed from a variety of suitable materials.
摘要翻译：用于植入体腔内的腔内假体以保持腔内通畅，包括支撑结构和聚合物部件，其可以是连接到聚合物包层的线材的形式。支撑结构可以由具有形状记忆或假弹性特性的形状记忆合金形成，或由具有固有弹簧张力的弹性材料形成，例如弹簧钢，编织不锈钢丝或复合材料，例如编织或编织碳纤维。聚合物包层可以由各种合适的材料形成。

8. 发明授权

US5468138A Apparatus for stretching polymer films 失效
标题翻译：聚合物膜拉伸装置
公开(公告)号：US5468138A
公开(公告)日：1995-11-21
申请号：US219447
申请日：1994-03-29
申请人： Charles F. Bosse , Rajagopal R. Kowligi
发明人： Charles F. Bosse , Rajagopal R. Kowligi
IPC分类号： B29C55/10 , B29C55/16 , B29C55/20
CPC分类号： B29C55/10 , B29K2027/18 , Y10S425/053 , Y10S428/91
摘要： An apparatus for expanding polymer films such as PTFE films includes gripping the unexpanded film about its periphery with a number of symmetrically disposed gripping members each equidistant from the center of the film. The gripping members are simultaneously rotated through an arc away from the center of the film, as by pivotally securing each gripping member to the end of an associated expansion arm and rotating the end of each expansion arm away from the center of the film while maintaining the gripping members equidistant from the center of the film. The expansion arms are uniformly rotated by a geared shaft powered by a drive mechanism that extends through the wall of an oven for coupling to an external motor. Also disclosed is an expanded PTFE film made in accordance with such process.
摘要翻译：用于膨胀诸如PTFE膜的聚合物膜的装置包括用与膜的中心等距的多个对称设置的夹持构件夹持其周围的未膨胀膜。夹持构件同时通过远离膜的中心的弧旋转，如通过将每个夹持构件枢转地固定到相关联的膨胀臂的端部并将每个膨胀臂的端部远离膜的中心旋转，同时保持夹紧构件与电影中心等距。膨胀臂由驱动机构驱动的齿轮轴均匀地旋转，驱动机构延伸穿过炉的壁连接到外部电动机。还公开了根据这种方法制成的膨胀PTFE薄膜。

9. 发明授权

US5152782A Non-porous coated PTFE graft 失效
标题翻译：非多孔涂层PTFE砂轮
公开(公告)号：US5152782A
公开(公告)日：1992-10-06
申请号：US358011
申请日：1989-05-26
申请人： Rajagopal R. Kowligi , Robert C. Farnan , William M. Colone , Linda V. Della Corna , Joseph B. Sinnott
发明人： Rajagopal R. Kowligi , Robert C. Farnan , William M. Colone , Linda V. Della Corna , Joseph B. Sinnott
IPC分类号： A61F2/06 , A61L27/00 , A61L27/16 , A61L27/34 , A61L27/50 , A61M25/16
CPC分类号： A61L27/507 , A61F2/06 , A61L27/16 , A61L27/34
摘要： A non-porous coated PTFE graft includes a PTFE tube having a conventional porous inner cylindrical wall and a non-porous elastomeric coating applied over at least a portion of the outer cylindrical wall of the PTFE tube to render such portion of the outer cylindrical wall non-porous. The elastomeric coating is made of polyurethane or another biocompatible non-porous elastomer and precludes tissue ingrowth into the outer cylindrical wall, minimizes suture hole bleeding, and increases suture retention strength, while reducing the incidence of serous weepage. The elastomeric coating is preferably applied by mounting the PTFE tube upon a mandrel of like diameter and either dip coating or spray coating all, or selected portions, of the PTFE tube with liquified polyurethane. After the polyurethane coating is completely dried, the non-porous vascular graft is removed form the mandrel and is ready for use.
摘要翻译：无孔涂层PTFE移植物包括PTFE管，其具有常规的多孔内圆柱形壁和在PTFE管的外圆柱形壁的至少一部分上施加的无孔弹性体涂层，以使外圆筒壁的这种部分不很多弹性体涂层由聚氨酯或其他生物相容的无孔弹性体制成，可防止组织向外圆柱形壁向内生长，最大限度地减少缝合线渗出，并增加缝合线保持强度，同时降低浆液渗漏的发生率。弹性体涂层优选通过将PTFE管安装在类似直径的心轴上，并且使用液化聚氨酯浸渍涂覆或喷涂PTFE管的全部或选定部分来施加。在聚氨酯涂层完全干燥后，从芯轴上取出无孔血管移植物并准备使用。

10. 发明授权

US06214039B1 Covered endoluminal stent and method of assembly 失效
标题翻译：覆盖的腔内支架和组装方法
公开(公告)号：US06214039B1
公开(公告)日：2001-04-10
申请号：US09011846
申请日：1998-02-18
申请人： Christopher E. Banas , Rajagopal R. Kowligi , Roy H. Tang
发明人： Christopher E. Banas , Rajagopal R. Kowligi , Roy H. Tang
IPC分类号： A61F206
CPC分类号： A61F2/07 , A61F2/89 , A61F2/90 , A61F2002/075
摘要： A radially expandable endoluminal covered stent assembly and a method and apparatus for making the same. A longitudinally and radially expanded polytetrafluoroethylene tubular graft is circumferentially engaged about one or more radially expandable stents and is retained thereon by a radial recoil force exerted by the tubular graft against the stent. The graft is retained on the stent or stents prior to and during endoluminal delivery and radial expansion without the use of adhesives, sutures or other attachment means. Further, upon radial expansion the stent or stents do not require retaining means for preventing contraction, despite the inherent recoil imparted by the tubular graft. The covered stent is assembled by joining a dilation mandrel and a stent mandrel, placing the graft on the dilation mandrel where it is radially expanded, and passing the expanded graft over the stent that is positioned on the stent mandrel.
摘要翻译：一种可径向膨胀的内腔支架组件及其制造方法和装置。纵向和径向膨胀的聚四氟乙烯管状移植物围绕一个或多个可径向扩张的支架周向接合，并且通过由管状移植物抵靠支架施加的径向反冲力而保持在其上。在不使用粘合剂，缝合线或其他附着手段的情况下，移植物保留在支架或支架之前和之后的腔内递送和径向扩张。此外，在径向膨胀时，支架或支架不需要用于防止收缩的保持装置，尽管由管状移植物施加固有的反冲。被覆盖的支架通过连接扩张心轴和支架心轴来组装，将移植物放置在其放射状膨胀的扩张心轴上，并将扩张的移植物穿过位于支架心轴上的支架上。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式