An unmanned aerial vehicle according to certain embodiments generally includes a chassis, a power supply mounted to the chassis, a control system operable to receive power from the power supply, a plurality of arms extending outward from the chassis, a plurality of rotors, and a support structure mounted atop the chassis. Each rotor is mounted to a corresponding arm of the plurality of arms, is in communication with the control system, and is operable to generate lift under control of the control system. The support structure includes a plurality of arched struts that connect to one another at an apex region of the support structure.

A hook gate or hoist hook having a hook gate that is designed to prevent dynamic rollout. The lockable gate includes one or more release mechanisms that allow the gate to unlock and open upon actuation of the release mechanisms. The release mechanisms reside within a circumferential guard that extends outwardly from the gate. The guards preferably extend at least as far as the release mechanism or beyond the extension of the release mechanism. The hook gate further includes anti-snagging flanges extending generally in the vertical direction from both the top and bottom portions of the guard. The circumferential guard and the anti-snagging flanges in combination make it nearly impossible for an attachment mechanism to become improperly oriented under a load and effectively eliminate the possibility of dynamic rollout.

A hook gate or hoist hook having a hook gate that is designed to prevent dynamic rollout. The lockable gate includes one or more release mechanisms that allow the gate to unlock and open upon actuation of the release mechanisms. The release mechanisms reside within a circumferential guard that extends outwardly from the gate. The guards preferably extend at least as far as the release mechanism or beyond the extension of the release mechanism. The hook gate further includes anti-snagging flanges extending generally in the vertical direction from both the top and bottom portions of the guard. The circumferential guard and the anti-snagging flanges in combination make it nearly impossible for an attachment mechanism to become improperly oriented under a load and effectively eliminate the possibility of dynamic rollout.

A hook system has a mount that includes a first sidewall comprising a concave profile on a longitudinal end of the first sidewall, a second sidewall laterally offset in a fixed location relative to the first sidewall and defining a channel therebetween, the second sidewall having a second concave profile on a longitudinal end of the second sidewall. The hook system also has a first pin structure extending between the first sidewall and the second sidewall and a connector. The connector has a third concave profile, the third concave profile being configured to receive the first pin structure therein. The hook system also includes a second pin structure extending through the connector, wherein each of the first concave profile and the second concave profile are configured to receive the second pin structure therein. The connector is configured to be at least partially received within the channel.

A quick-release attachment point for fall protection. It includes a body portion, a retaining member, a capturing and releasing mechanism, a remote control module, and an energy source. The body portion, and the retaining member in a normal position thereof, together form a closed aperture for capturing a D-ring attachment point or other article of attachment hardware. The capturing and release mechanism is operated through the remote control module to free the retaining member so that it can move, in response to energy provided by the energy source, in a direction away from the normal operating position and in an amount such that it no longer closes the aperture, so that the article can escape from the apparatus.

A quick-release attachment point for fall protection. It includes a body portion, a retaining member, a capturing and releasing mechanism, a remote control module, and an energy source. The body portion, and the retaining member in a normal position thereof, together form a closed aperture for capturing a D-ring attachment point or other article of attachment hardware. The capturing and release mechanism is operated through the remote control module to free the retaining member so that it can move, in response to energy provided by the energy source, in a direction away from the normal operating position and in an amount such that it no longer closes the aperture, so that the article can escape from the apparatus.

Support assembly (F5.13.1) moving sliding assembly (F5.13.3), position lock assembly (F5.13.6), push lock rod (F5.13.8), tension spring (F5.13. I0)), threaded cap (F5.13.1 1) and release handle (F5.13.12). Bolt holes (F5.13.2), lower protection rod (F5.13.31) and upper protection rod (F5.1 3.32). Two lower protection rods (F5.13.14) and one upper protection rod (F5.1 3, 15) with strengthening link (F5.13.16). Push lock rod (F5.1 3,8) is equipped to lock sliding assembly (F5.13.3) in to possible positions in in lock down holes (F5.13.9).

Support assembly (F5.13.1) moving sliding assembly (F5.13.3), position lock assembly (F5.13.6), push lock rod (F5.13.8), tension spring (F5.13. I0)), threaded cap (F5.13.1 1) and release handle (F5.13.12). Bolt holes (F5.13.2), lower protection rod (F5.13.31) and upper protection rod (F5.1 3.32). Two lower protection rods (F5.13.14) and one upper protection rod (F5.1 3, 15) with strengthening link (F5.13.16). Push lock rod (F5.1 3,8) is equipped to lock sliding assembly (F5.13.3) in to possible positions in in lock down holes (F5.13.9).

The rescue hook can be remotely attached to a load and can self-center to position the load in an optimal place on the hook. One embodiment of the rescue hook has an opening for a placement tool such as an extended stick so a user can place the rescue hook onto an attachment point of a harness or object remotely. The body of the rescue hook can form an elongated throat to hold the attachment point and a gate pivotably attached to the body to enclose the throat.

The rescue hook can be remotely attached to a load and can self-center to position the load in an optimal place on the hook. One embodiment of the rescue hook has an opening for a placement tool such as an extended stick so a user can place the rescue hook onto an attachment point of a harness or object remotely. The body of the rescue hook can form an elongated throat to hold the attachment point and a gate pivotably attached to the body to enclose the throat.