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34. 发明授权

US1730734A Means for indicating conditions of liquids employed in internal-combustion engines 失效
标题翻译：用于指示内燃机中使用的液体条件的方法
公开(公告)号：US1730734A
公开(公告)日：1929-10-08
申请号：US31094028
申请日：1928-10-08
申请人： FIRST TRUST & SAVINGS BANK OF
发明人： FRANCIS KEY JAMES
IPC分类号： G01F23/16
CPC分类号： G01F23/167

40. 发明授权

US3834236A Device for measuring liquid level and air pump for use therein 失效
标题翻译：用于测量液位的装置和用于其的空气泵
公开(公告)号：US3834236A
公开(公告)日：1974-09-10
申请号：US32722473
申请日：1973-01-26
申请人： CITROEN SA
发明人： DURIN M
IPC分类号： G01F23/16
CPC分类号： G01F23/167
摘要： Air pump comprises a first, constant volume chamber having an outlet, a vent to atmosphere, and an inlet connecting it to a second variable volume chamber, the volume of which is controlled by a flexible membrane. Operating means are provided for simultaneously actuating the membrane to reduce the volume of the second chamber and closing said vent so that air is expelled from the second chamber through the first chamber and its outlet, preferably into the pneumatic circuit of a manometric system for measuring the level of liquid in a container, e.g., the level of oil in the crankcase of a motor.
摘要翻译：空气泵包括具有出口，通向大气的第一恒定容积室和连接到第二可变容积室的入口，其容积由柔性膜控制。提供操作装置以同时致动膜以减小第二室的体积并关闭所述排气口，使得空气通过第一室及其出口从第二室排出，优选地进入测量系统的气动回路容器中的液体水平，例如电动机曲轴箱中的油位。

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