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发明授权
US5713610A Semi-permanent vacuum closure with multiple retubulation capability 失效
半永久性真空闭合，具有多重再排气功能

Semi-permanent vacuum closure with multiple retubulation capability
摘要：
A vacuum system (20) includes an enclosure (22) having a vacuum-tight wall (26) and an internally threaded aperture (66) through the wall (26). A tip-off fitting (24) has a base (50) with a bore (52) therethrough, a hollow tube (62) fixed to the base (50) with a vacuum-tight seal, such that an interior (64) of the tube (62) is in communication with the bore (52) in the base (50), and an external thread (58) on the exterior of the base (50). The external thread (58) on the exterior of the base (50) is dimensioned to threadably engage the internal thread (68) on the aperture (66). There is a disengageable vacuum sealant (70) such as a layer of indium metal between the external thread (58) of the base (50) and the internal thread (68) of the aperture (66). The vacuum system (20) is evacuated through the tip-off fitting (24) and sealed by closing off the hollow tube (62). At a later time, the vacuum system can be brought to atmospheric pressure and then reseated by replacing the tip-off fitting with another tip-off fitting and repeating the evacuation and sealing.
摘要（中）：

真空系统（20）包括具有真空密封壁（26）和穿过壁（26）的内螺纹孔（66）的外壳（22）。 一个倒入配件（24）具有一个具有穿过其中的孔（52）的底座（50），一个中空管（62），用一个真空密封的方式固定在基座（50）上，使得内部 管（62）与基座（50）中的孔（52）连通，并且在基座（50）的外部上具有外螺纹（58）。 基座（50）的外部上的外螺纹（58）的尺寸被设计成螺纹接合孔（66）上的内螺纹（68）。 在基座（50）的外螺纹（58）和孔（66）的内螺纹（68）之间存在可脱离的真空密封剂（70），例如铟金属层。 真空系统（20）通过顶端配件（24）抽真空，并通过关闭中空管（62）进行密封。 以后，真空系统可以达到大气压力，然后通过用另一个卸料装置代替卸料装置并重复排气和密封来重新安装。

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