公开(公告)号：US1669220A

公开(公告)日：1928-05-08

申请号：US4561025

申请日：1925-07-23

Applicant: THROPP FRANK W ,  WILLIAM MALCOLM

Inventor： THROPP FRANK W ,  WILLIAM MALCOLM

IPC: B65G47/31

CPC classification number: B65G47/31

公开(公告)号：US20100276203A1

公开(公告)日：2010-11-04

申请号：US12433587

申请日：2009-04-30

Applicant: WILLIAM MALCOLM

Inventor： WILLIAM MALCOLM

IPC: E21B7/08

CPC classification number: E21B7/062 ,  E21B7/046 ,  E21B7/201

Abstract: A steering head for use with an auger and a casing engaged to the auger, the steering head comprising: a generally cylindrical body having a first body end and a second body end mountable to the casing, a bore channel concentrically received in the body, a front lip, a rear lip, a body surface, and a lead edge; an outer tube having an internal side covering the body surface and an opposing external side; a steering flap disposed on the external side of the outer tube having a first flap face and a second flap face, a distal end, and a hinge end, the steering flap disposable in a retracted position and an extended position; a biased hinge operative to retract the steering flap into the retracted position; and a powered actuator operative to extend the first flap face into the extended position.

Abstract translation: 一种用于螺旋推运器和与螺旋钻接合的壳体的转向头，所述转向头包括：大致圆柱形本体，其具有可安装到所述壳体的第一主体端部和第二主体端部，同心地容纳在所述主体中的钻孔通道， 前唇，后唇，身体表面和前缘; 具有覆盖所述主体表面的内侧的外管和相对的外侧; 设置在所述外管的外侧上的转向挡板，其具有第一挡板面和第二挡板面，远端和铰链端，所述转向挡板一次性处于缩回位置和延伸位置; 偏转的铰链，其可操作以将转向挡板缩回到缩回位置; 并且动力致动器可操作以将第一挡板面延伸到延伸位置。