Abstract: A snap-hook, including a hook and a dual-direction latch pivotally attached to the hook by a latch pin. The dual-direction latch blocks an opening to the hook's throat when held in a neutral position by a latch spring having a first spring force and a lever-return spring having a second spring force. The dual-direction latch is configured to move into the throat by overcoming the first spring force and to move out of the throat by overcoming the second spring force. The dual-direction latch comprises a spring guard attached to the dual-direction latch so as to shield the lever-return spring from coming into contact with one or both of an object disposed within a throat of the hook and an inner edge of the hook throat.

Abstract: A snap-hook, including a hook and a dual-direction latch pivotally attached to the hook by a latch pin. The dual-direction latch blocks an opening to the hook's throat when held in a neutral position by a latch spring having a first spring force and a lever-return spring having a second spring force. The dual-direction latch is configured to move into the throat by overcoming the first spring force and to move out of the throat by overcoming the second spring force. The dual-direction latch comprises a spring guard attached to the dual-direction latch so as to shield the lever-return spring from coming into contact with one or both of an object disposed within a throat of the hook and an inner edge of the hook throat.

Abstract: A snap-hook comprising: a hook-shaped body having a throat opening and a shank end, wherein the hook-shaped body includes a primary aperture located at the shank end suitable for attaching a primary line and a secondary aperture located approximately opposite the throat opening suitable for attaching a secondary line; and a dual-direction latch pivotally attached to the hook-shaped body such that the dual-direction latch spans the throat opening when in a neutral position and is capable of pivoting into and out of the throat of the hook-shaped body, wherein the dual-direction latch comprises a bent wire having two free ends, each end inserted in a different hole of two holes in the hook-shaped body that are non-axially-aligned resulting in a spring force that biases the dual-direction latch toward the neutral position and resists pivotal movement of the dual-direction latch both into and out of the throat.

Abstract: An adaptor for an unmanned vehicle for inspecting an object, the adaptor includes a moveable ring assembly and a fixed ring. The moveable ring assembly rotates around a periphery of the unmanned vehicle and allows the unmanned vehicle to move along a surface of the object while maintaining a fixed stand-off distance between an exterior surface of the adaptor and the surface of the object. The fixed ring is connected around the exterior surface of the unmanned vehicle and secures a lateral position of the moveable ring assembly with respect to the unmanned vehicle.