Patent ID: 7131235

Claim:
A child barrier for installation in a passage comprising a frame with two side portions which, in use, are positioned adjacent the walls of the passage, each side portion carrying one or more vertically spaced abutment members for engagement with an adjacent wall, the abutment member(s) on at least one of the side portions being connected thereto by an adjustment mechanism, each adjustment mechanism comprising an elongate threaded member, one end of which is connected to the associated abutment member and the other end of which is longitudinally slidably received in the associated side portion, each adjustment mechanism also including an adjustment member in screw threaded engagement with the threaded member, the adjustment member and the associated side portion of the frame affording respective surfaces opposed to one another, on one of which there is at least one resilient locking projection and on the other of which there is at least one cooperating locking recess, at least one of the projection and recess having two inclined ramp surfaces extending in opposite circumferential directions of the threaded member, one of the ramp surfaces being inclined at a relatively shallow angle to a plane extending radially of the threaded member and the other ramp surface being inclined at a relatively steep angle thereto, whereby after the adjustment member has been tightened by rotating it in one direction until it is in sliding contact with the opposed surface on the frame, a substantially greater torque is required to rotate it in the opposite direction as a result of the engagement of the locking projection in the locking recess.