Abstract: A safety device comprises vacuum anchors for attachment to a surface. The anchors are interconnected by a rigid track along which a carriage runs. The carriage includes means for connection to a safety line and harness. Such an arrangement provides enhanced freedom of movement and increased resistance against shearing forces when arresting a fall.

Abstract: A safety device comprises vacuum anchors for attachment to a surface. The anchors are interconnected by a rigid track along which a carriage runs. The carriage includes means for connection to a safety line and harness. Such an arrangement provides enhanced freedom of movement and increased resistance against shearing forces when arresting a fall.

Abstract: A safety device is secured a person to a surface so that the person can safely move about the surface without falling. The device has an anchor which incorporates an attachment arrangement for a safety line. The anchor has a rigid element or plate which has a sealing element extending from one side of the plate to define a working volume. The working volume becomes a working chamber when the anchor is attached to a surface. A valve is provided for selectively connecting the working chamber to a vacuum source or to vent the working chamber to the atmosphere. The vacuum source is situated remotely from the anchor and is attached to the anchor by a vacuum supply line and a one way valve.