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    • 7. 发明授权
    • Heart valve prosthesis
    • 心脏瓣膜假体
    • US4297749A
    • 1981-11-03
    • US125121
    • 1980-02-27
    • Robert B. DavisJohn SkeltonRichard E. ClarkWilbur M. Swanson
    • Robert B. DavisJohn SkeltonRichard E. ClarkWilbur M. Swanson
    • A61F2/24A61F1/22
    • B21F45/008A61F2/2412Y10S623/90
    • A frame system for heart valve prosthesis. A first frame has at least three generally parallel legs each comprising a pair of rod portions connected at one end and diverging at the other end as lobes respectively connecting with rod portions of others of said legs. The lobes form an aperture therebetween and the legs are adapted to receive the margin of a valve leaflet between the rod portions thereof. Thus, the leaflet may be secured to two adjacent legs and the interconnecting lobe so as to have a free edge extending between said adjacent legs. A second frame is adapted to nest with the first frame and comprises a rod formed to be substantially congruent with the interconnecting lobes, whereby the leaflets may be secured to and between the frames.
    • 心脏瓣膜假体的框架系统。 第一框架具有至少三个大致平行的腿,每个腿包括一对杆部分,该杆部分在一端连接并且在另一端处以分别与所述腿部中的其他杆的杆部分连接的凸起分开。 叶片在它们之间形成孔,并且腿部适于在其杆部之间容纳瓣膜小叶的边缘。 因此,小叶可以固定到两个相邻的腿和互连瓣,以便具有在所述相邻腿之间延伸的自由边缘。 第二框架适于与第一框架嵌套并且包括形成为与互连凸角基本一致的杆,由此传单可以固定到框架之间并且在框架之间。
    • 10. 发明授权
    • Process for cooling and fluidizing
    • 冷却和流化工艺
    • US4422302A
    • 1983-12-27
    • US404762
    • 1982-08-03
    • Robert B. DavisMark A. Delano
    • Robert B. DavisMark A. Delano
    • B01J8/24B01J8/18F17C9/02F25D3/10F25D17/00
    • B01J8/1836F17C9/02F25D3/10
    • In a process for cooling and fluidizing a bed of particles by passing a cryogen through the bed, said bed being first cooled to a desired operating temperature, the improvement comprising:(a) admixing a liquid cryogen and an inert gas, said gas being at ambient temperature, at a point external, but proximate, to the bed to provide a mixture of liquid cryogen and gas at a temperature sufficiently low to maintain the bed at about the desired operating temperature;(b) introducing the mixture from step (a) into at least two heat transfer coils connected in parallel and located in the bed whereby the desired operating temperature is imparted to the bed, and the liquid cryogen in the mixture vaporizes; and(c) removing the mixture of vaporized liquid cryogen and gas formed in step (b) from the coils and introducing the mixture into the bed to fluidize the bed.
    • 在通过使冷冻剂通过床来冷却和流化颗粒床的过程中,所述床首先被冷却到所需的操作温度,改进包括:(a)混合液体冷冻剂和惰性气体,所述气体处于 环境温度,在外部但接近于床处,以在足够低的温度下提供液体冷冻剂和气体的混合物,以将床保持在大约所需的操作温度; (b)将来自步骤(a)的混合物引入平行连接并位于床中的至少两个热传递线圈,由此将所需的操作温度赋予床,混合物中的液体致冷剂蒸发; 和(c)从线圈中除去蒸发的液体冷冻剂和步骤(b)中形成的气体的混合物,并将混合物引入床中以使床流化。