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1. 发明授权

US5333653A Inflatable manhole sealing device 失效
标题翻译：充气人孔密封装置
公开(公告)号：US5333653A
公开(公告)日：1994-08-02
申请号：US81563
申请日：1993-06-23
申请人： Michael P. Rzesutock , Neal A. Clevenger
发明人： Michael P. Rzesutock , Neal A. Clevenger
IPC分类号： B67D7/00 , B67D7/04 , B65B1/28
CPC分类号： B67D7/002 , B67D7/04
摘要： A manhole sealing device enables the recovery of vapors displaced from a tank during the process of filling a tank with fuel, through the manhole. The sealing device comprises a sealing gasket, which has an inflation chamber defined by two tubular walls. When the chamber is inflated, the gasket is distended to toroidal configuration capable of sealing engaging manhole inner diameters of a wide dimensional range. The sealing gasket is mounted on a lock-down bar what is clamped against the upper end of the manhole, using bolts that are also used in clamping the hatch cover for the manhole. Preferable the gasket is first inflated to centralize it relative to the manhole and then clamped in fixed relation relative thereto.
摘要翻译：人孔密封装置能够在通过人孔将燃料罐装入过程中从罐中回收蒸汽。密封装置包括密封垫圈，其具有由两个管状壁限定的充气室。当腔室膨胀时，垫圈膨胀到能够密封具有宽尺寸范围的人孔内径的环形构造。密封垫片安装在锁定杆上，使用用于夹紧人孔舱口盖的螺栓将其夹紧在人孔的上端。优选首先将垫圈充气以使其相对于人孔集中，然后相对于其固定的关系夹紧。

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