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公开(公告)号：US4131216A
公开(公告)日：1978-12-26
申请号：US791812
申请日：1977-04-28
CPC分类号： B67D7/06 , G01M3/2892
摘要： A system and method for detecting leaks in an underground piping network supplying liquid petroleum products pumped from an underground storage tank to an aboveground dispenser outlet. A highly sensitive flow detector situated in a parallel looped bypass arrangement is selectively operated for ascertaining existence or non-existence of a piping leak. Following a sufficient time lapse of non-dispensing for enabling temperature stabilization of the piping network to occur, the detector is actuated in a controlled sequence of go, no-go steps that culminates in ascertaining existence or non-existence of a piping leak while at the same time eliminating any false indication occasioned by detector malfunction.
摘要翻译： 一种用于检测地下管网中泄漏的系统和方法，该地下管道网络将从地下储罐泵送的液化石油产品供应到地上分配器出口。 选择性地操作位于并联环路旁路装置中的高灵敏度流量检测器，以确定管道泄漏的存在或不存在。 经过足够的不分配时间后，可以实现管网的温度稳定化，检测器以受控制的顺序执行，最终确定管道泄漏的存在或不存在，同时在 同时消除由检测器故障引起的任何错误指示。
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公开(公告)号：US4611729A
公开(公告)日：1986-09-16
申请号：US645380
申请日：1984-08-28
摘要： A nozzle boot for a fuel dispenser in which the nozzle support hook is adjustably settable between a first position for accommodating a standard size dispenser nozzle and a second position for accommodating a larger size dispenser nozzle utilized for recovering fuel vapor while fuel is being dispensed. For electrically actuating the dispenser to enable fuel to be dispensed through the nozzle, the nozzle support is slidably displaceable for operating a linkage mechanism connected to the operating switch.
摘要翻译： 一种用于燃料分配器的喷嘴罩，其中喷嘴支撑钩可调节地设置在用于容纳标准尺寸的分配器喷嘴的第一位置和用于容纳用于在分配燃料的同时回收燃料蒸气的较大尺寸的分配器喷嘴的第二位置。 为了电动致动分配器以使得能够通过喷嘴分配燃料，喷嘴支撑件可滑动地移位以用于操作连接到操作开关的连杆机构。
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