Patent attributes
A hook assembly has a hook body with a shank portion and a free end portion defining a hook opening. The free end portion has a tip end with a through passage, and a key slot formed in the through passage. A removable pin is received in the through passage to substantially close an open side of the hook opening to retain items within the hook opening. The pin has a protrusion that mates with the key slot when the pin is rotated to a first position to allow the pin to be received in and removed from the through passage. The protrusion serves as a locking structure to prevent the pin from being removed from the through passage when the pin is rotated away from the first position. A spring retainer is arranged to keep the pin in its locked position.
