公开(公告)号：US4404752A

公开(公告)日：1983-09-20

申请号：US270083

申请日：1981-06-03

申请人： John W. Hanna

发明人： John W. Hanna

IPC分类号： G01C17/18 ,  G01C17/04

CPC分类号： G01C17/18

摘要： The invention is in the field of compass course following and comprises a means and method of mounting a compass directly on a map with a North-South reference line and following a course on the map directly once the compass needle is aligned with North. In all references to the direction "North" throughout this document magnetic North only shall apply.

摘要翻译： 本发明在罗盘课程的领域中，并且包括将指南针直接安装在具有南北参考线的地图上的手段和方法，并且一旦罗盘针与北对准，则直接在地图上直接跟踪课程。 在本文件中所有提到的“北”方向，磁北只适用。

公开(公告)号：US4152264A

公开(公告)日：1979-05-01

申请号：US850257

申请日：1977-12-23

申请人： John W. Hanna, Sr.

发明人： John W. Hanna, Sr.

IPC分类号： B01D21/00 ,  B01D29/00 ,  B01D35/02

CPC分类号： B01D35/02 ,  B01D21/0012 ,  B01D21/0042 ,  B01D21/02 ,  B01D29/33

摘要： A suction mechanism submerged underwater in a lake, the suction mechanism being designed to eliminate sand and mud from entering a foot valve connected to hoses for pumping water out of lake for use; the suction mechanism including the foot valve being at the upper end of a vertical suction pipe, the foot valve being covered by a protective dome, a horizontal anchor stand supporting the suction pipe vertically and the lines leading from the lake including a suction pipe and a pressure pipe.

公开(公告)号：US3424020A

公开(公告)日：1969-01-28

申请号：US3424020D

申请日：1967-07-03

申请人： JOHN W HANNA

发明人： HANNA JOHN W

IPC分类号： B62D5/02 ,  F16H35/04

CPC分类号： B62D5/02 ,  Y10T74/19605