Patent ID: 9045981
Filing Date: 2015-06-02
Classification: A62B,E04G,E21D,F16B

Abstract:
1. A safety device that is a safety strut, comprising: a drive rod; a telescopic tubular body of the safety strut with an axial space which is bounded by an outer casing and through which an extending part is axially movable, the extending part having an axial cavity in which the drive rod is disposed, the tubular body being adjustable between a relatively compact starting position in which the extending part is located at least substantially wholly inside the outer casing, and at least one extended position in which the extending part extends for at least a substantially greater part outside the outer casing; and a fixation system configured to fix the extending part and the outer casing relative to each other in the at least one extended position, the fixation system comprising at least one blocking body which is provided in the axial space between the outer casing and the extending part in a recess gradually increasing in depth in an axial direction on a main surface adjoining the axial space, wherein in the at least one extended position, the at least one blocking body clamps in a shallow part of the recess between a main surface of the outer casing and a main surface of the extending part in order to block movement of the extending part into the axial space inside the outer casing, wherein the drive rod is coupled at an outer end close to the at least one blocking body to a drive member which is configured to drive the at least one blocking body out of the shallow part of the recess into a deeper part of the recess to enable free setting of the outer casing and the extending part relative to each other.