| 摘要 |
<p>"COLLAPSIBLE ARM ANCHOR" of the disclosure: Self-clearing anchor having one or more arms hinged to the stem, in the vicinity of the crown of the anchor, cooperating with biassing means to counteract the rotation of said arms , said arms being adapted, when subjected to a determined stress, to collapse beyond the crown of the anchor . In said anchor said biassing means can be adjusted by appropriate regulation means</p> |
