发明名称 Outdoor well depth indicator
摘要 An outdoor well depth indicator including a sleeve vertically slidable along a pipe extending above the well house and connected by a line to a float on the surface of the water in the well. The indicator sleeve can be seen from a distance and from any direction around a well. Also disclosed is a cutoff system for terminating a supply of water from the well when the level of water in the well reaches a minimum desired level, without immediately shutting off the pump motor.
申请公布号 US4249598(A) 申请公布日期 1981.02.10
申请号 US19790065979 申请日期 1979.08.13
申请人 GREER, HENRY R 发明人 GREER, HENRY R
分类号 E21B34/16;E21B43/12;E21B47/04;G01F23/42;(IPC1-7):E21B34/02 主分类号 E21B34/16
代理机构 代理人
主权项
地址