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    • 47. 发明授权
    • Stent made by rotational molding or centrifugal casting and method for making the same
    • 通过旋转成型或离心铸造制成的支架及其制造方法
    • US06574851B1
    • 2003-06-10
    • US09629075
    • 2000-07-31
    • Michael S. Mirizzi
    • Michael S. Mirizzi
    • B23F2500
    • B29C41/06A61F2/91A61F2/915A61F2002/91516A61F2002/91533A61F2002/91575A61F2230/0013B29C41/003B29C41/38Y10T29/4998Y10T29/49988
    • The invention is directed to an expandable or self-expanding stent for implantation in a body lumen, such as an artery. The stent is made from a centrifugal casting process in which liquid casting material is placed within a female mold which includes an elongated cavity having a angular wall formed of grooves cooperating to form a predetermined stent configuration and rotating the female mold to distribute the casting material throughout the network of grooves. The stent can also be made from a rotational molding process in which dry cold powder resin is placed in a female mold and rotated at low speeds and heated to allow the charge of cold powder material to sinter to form the shape of the stent. The invention is also directed to the method for making such stents made from either centrifugal casting or rotational molding processes.
    • 本发明涉及用于植入体腔(例如动脉)中的可扩张或自扩张支架。 支架由离心铸造工艺制成,其中液体铸造材料放置在阴模内,该阴模包括细长空腔,该细长腔具有由沟槽形成的凹槽,所述凹槽协作形成预定的支架构型,并且旋转阴模以分布铸件材料 网络槽。 支架还可以由旋转模制方法制成,其中将干冷粉末树脂放置在阴模中并以低速旋转并加热,以使冷粉末材料的加料烧结以形成支架的形状。 本发明还涉及制造由离心铸造或旋转成型工艺制成的这种支架的方法。