Abstract: A cargo hook includes a main body; a load arm configured to be pivotally attached to the main body with a load arm pivot connection; a keeper configured to be pivotally attached to the main body through a keeper pivot connection; and a keeper control unit configured to have a keeper locked configuration that locks movement of the keeper about the keeper pivot connection with respect to the main body.

Abstract: A hoist system includes a hook; a cable connected to the hook; a motor configured to move the hook and the cable; an overload protection device (OLPD) configured to limit loads imparted on one or more of the hook, the cable, and the motor. The hoist system further includes an emergency brake system configured to stop movement of at least the cable, where the emergency brake system is configured to operate in response to a manual control or automatically in response to a controller.

Abstract: A hoist system that includes a hook; a cable connected to the hook; a motor configured to move the hook and the cable; and an overload protection device (OLPD) configured to limit loads imparted on one or more of the hook, the cable, and the motor. The hoist system further includes an overload protection device (OLPD) slip detection system configured to detect activation of the overload protection device (OLPD).