Patent ID: 11859692
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A hook assembly, comprising:
a hook body with a shank portion and a free end portion defining a hook opening for receiving an item to be engaged by the hook assembly, said shank portion comprising a base, and said free end portion comprising a tip end portion with a through passage; and
a removable pin assembly having a pin member received in said through passage to substantially close an open side of said hook opening to retain items within said hook opening;
wherein said removable pin assembly comprises a lynch pin with a spring retainer;
wherein said through passage comprises a key slot, and said lynch pin comprises a protrusion that mates with said key slot when the lynch pin is rotated to a first position to allow said lynch pin to be received in and removed from said through passage, and wherein said protrusion serves as a locking structure that prevents said lynch pin from being removed from said through passage when said lynch pin is rotated away from said first position;
wherein said spring retainer is arranged to bias said lynch pin to a rotational position away from said first position to prevent said lynch pin from being removed from said through passage; and
wherein said lynch pin comprises a head, said spring retainer comprises a generally circular spring having offset ends received in respective openings in said head, and said spring retainer has a first released position in which the lynch pin can be rotated freely within the through passage, and a second closed position in which the spring retainer is held by spring force against an outer surface of the lynch pin and has abutting portions arranged to abut respective sides of the free end portion of the hook body to prevent rotational movement of the lynch pin to said first position.