公开(公告)号：US5320482A

公开(公告)日：1994-06-14

申请号：US947593

申请日：1992-09-21

Applicant: Alan S. Palmer ,  John W. Henry, IV ,  John P. Kerr

Inventor： Alan S. Palmer ,  John W. Henry, IV ,  John P. Kerr

IPC: F04D29/04 ,  F04D29/44 ,  F01D3/00

CPC classification number: F04D29/041 ,  F04D29/448

Abstract: A control stator comprising a plurality of stationary vanes, ribs, or cavities is provided in a centrifugal pump having a shrouded impeller. The function of the control stator is to slow the swirl of fluid in the cavity between the casing and the impeller front shroud and thereby provide a very cost effective solution to the problem of excess axial thrust. The control stator is a simple, inexpensive non-rotating part that can be affixed in an existing space in the pump casing between the casing wall and the front shroud of the impeller.

Abstract translation: 包括多个静止叶片，肋或空腔的控制定子设置在具有带罩叶轮的离心泵中。 控制定子的功能是减缓壳体和叶轮前护罩之间的空腔中的流体的涡流，从而为过度轴向推力的问题提供了非常经济有效的解决方案。 控制定子是简单，便宜的非旋转部件，其可以固定在泵壳体内的现有空间中，该壳体在壳体壁和叶轮的前护罩之间。

公开(公告)号：US4478379A

公开(公告)日：1984-10-23

申请号：US545609

申请日：1983-10-27

Applicant: John P. Kerr

Inventor： John P. Kerr

IPC: B64C27/10 ,  B64C39/02

CPC classification number: B64C27/10 ,  B64C39/024 ,  B64C2201/027 ,  B64C2201/044 ,  B64C2201/048 ,  B64C2201/108 ,  B64C2201/146 ,  B64C2201/148 ,  B64C2201/165 ,  B64C2201/22

Abstract: An unmanned aircraft of the remotely piloted type that is characterized by its configuration and outline using rigid counter rotating propellers, positioned substantially at the height of its center of mass or slightly below to allow producing a sufficiently large control moment to use a tether line for landing the aircraft and to allow using two substantially spheroidal surfaces at the top and bottom respectively rather than a single one relatively larger and more detectable surface as when the propellers are at the top.

Abstract translation: 一种遥控飞行器类型的无人驾驶飞机的特点是其配置和轮廓使用刚性的反向旋转螺旋桨，其基本上位于其质心或稍低于其高度的高度，以便产生足够大的控制力矩以使用系绳进行着陆 并且允许在顶部和底部分别使用两个基本上球形的表面，而不是当螺旋桨在顶部时相对较大和更可检测的表面。