Abstract: A safety hook in accordance with the invention comprises a body closed by a pivoting finger which can be prevented from rotating by a transverse locking lever. The locking lever is articulated on a lever pivot on the pivoting finger and has a notch engaging over a front lug of the body in the locked position, into which it is biased by a spring. A mobile abutment can be selectively positioned on the locking lever to prevent it pivoting in the unlocking direction. This assures reliable locking by means of a Locking lever that is easy to manipulate and immobilize.

Abstract: A safety hook in accordance with the invention comprises a body closed by a pivoting finger which can be prevented from rotating by a transverse locking lever. The locking lever is articulated on a lever pivot on the pivoting finger and has a notch engaging over a front lug of the body in the locked position, into which it is biased by a spring. This assures reliable locking by means of a locking lever that is easy to manipulate.

Abstract: A karabiner comprises a generally C-shaped body the ends of which are joined by a pivoting finger, articulated at a first end and engaging at its second end with the free end of the body. The corresponding engagement ends of the finger and of the body include a male end shape and a female end shape. The male end shape has a thinner portion carrying at least one lateral protuberance and engages in a slot in the female end shape. The lateral protuberance engages in a corresponding lateral housing of the slot shaped to restrict axial relative displacement of the end shapes and to prevent the karabiner finger opening when the body is under axial traction load. A shape of this kind has no hook-shape part, and combines the functions of contributing to withstanding axial traction loads and dynamic locking on application of axial traction loads to the karabiner body.

Abstract: A self-locking snap-hook is disclosed which is so shaped that the tractive load transmitted by a first traction element is applied to a first tractive force application end formed by the snap-hook body, and the tractive load transmitted by the second traction element is applied to the locking finger. Thus, the application of the tractive load tends to close the snap-hook and cause self-locking thereof.