Marine tether anchoring device

申请公布号：

US4459933(A)

申请号：

US19840315603

申请日期：

1984.10.30

申请公布日期：

1984.07.17

申请人：

VICKERS LIMITED

发明人：

BURCHETT, CLIVE J.

分类号：

B63B21/50;E21B41/10;(IPC1-7):F16B1/04;B63B21/26;F16D3/00

主分类号：

B63B21/50

摘要：

A marine tether anchoring device comprises an anchor body and a segmented spring collet that moves axially relative to the anchor body. As the anchor body moves downwardly relative to the collet the upper end of the collet is expanded by a wedge structure which is attached to the anchor body and lockingly engages the wall of an anchoring chamber. The lower end of the tether line is attached to the wedge structure and cannot escape from the anchoring chamber. Release is effected by slackening the tension on the tether line and supplying fluid to a piston supported in the anchor body so that the piston forces the collet downwardly and releases the segments of the spring collet from the face of the wedge structure. Retraction of the collet is completed by a cam ring that engages faces on the collet as final downward travel of the collet takes place.