| 摘要 |
An anchor device for anchoring an element such as a coupling in an opening in a wall the device including a sleeve for receiving the element, the sleeve being externally provided with a shoulder for bearing against a first face of the wall, and with an anchor member facing the shoulder having a portion that is resiliently movable between a laterally projecting position and a retracted position. The anchor member is a frustoconical ring received in a groove in the outside of the sleeve, the ring having larger end facing the shoulder with a sloping surface which forms the resiliently movable portion and which bears in the laterally projecting position against a zone of intersection between a side surface of the opening and a second face of the wall. |
