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1. 发明授权

US4783859A Aircraft toilet flush valve 失效
标题翻译：飞机马桶冲水阀
公开(公告)号：US4783859A
公开(公告)日：1988-11-15
申请号：US119203
申请日：1987-11-04
申请人： Mike M. Rozenblatt , Jon E. Allen , Anna M. Jung
发明人： Mike M. Rozenblatt , Jon E. Allen , Anna M. Jung
IPC分类号： B64D11/02 , E03F1/00 , F16K3/02 , F16K31/04
CPC分类号： E03F1/006 , B64D11/02 , F16K3/0281 , F16K31/04 , Y10S4/13
摘要： A flush valve is provided for opening and closing a drain connecting a toilet bowl to a waste holding tank maintained at a partial vacuum. The flush valve is located external to the drain and comprises a pinch or nip mechanism surrounding a flexible section of the drain and an electro-mechanically operated actuator for moving the pinch mechanism to close the drain by pinching it shut or to open the drain by pulling it apart. The actuator includes a motor for moving a piston in opposite directions, and a cylinder having one end connected to the pinch mechanism and another end containing an enclosure. The piston is retained and reciprocable a limited distance within the enclosure, and a spring is interposed within the enclosure to provide biasing means between the piston and the cylinder. The spring has sufficient stiffness relative to the force needed to shut the flexible drain section, in the absence of an obstruction, so that the flexible drain section may be fully closed without compression of the spring by the piston. However, when the flexible drain section is nipped shut, or if an obstruction is encountered, the spring will be compressed within the enclosure by the piston, causing operation of a switch to deactivate the motor and prevent motor stalling and damage to the valve. A manually operable shut-off flush valve also is provided, comprising a plate slidable through a coupling in the drain line to bring an opening in the plate in or out of registration with the drain line to open or close it, respectively.
摘要翻译：提供了一种冲洗阀，用于打开和关闭连接马桶的排水管，该排水管保持部分真空。冲洗阀位于排水管外部，并且包括围绕排水管的柔性部分的挤压或夹紧机构，以及电机械操作的致动器，用于移动夹紧机构以通过夹紧关闭排水口或通过拉动打开排水口它分开致动器包括用于沿相反方向移动活塞的电动机，以及一端连接到夹紧机构的气缸，另一端包含外壳。活塞在外壳内保持并往复运动有限的距离，并且弹簧插入在外壳内，以在活塞和气缸之间提供偏置装置。弹簧在没有障碍物的情况下相对于关闭柔性排水部分所需的力具有足够的刚性，使得柔性排水部分可以完全关闭，而不会由活塞压缩弹簧。然而，当柔性排水部分被夹紧或者遇到障碍物时，弹簧将被活塞压缩在外壳内，导致开关的操作使电机失效，并防止电动机停转并损坏阀门。还提供了一种可手动操作的关闭冲洗阀，其包括可以通过排水管中的联接器滑动的板，以使板中的开口分别与排水管对准或不对齐以打开或关闭。

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