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

Claim 15:
16. A weld-on hook assembly, comprising:
a hook body having a shank portion and a free end portion disposed in a common plane and defining a hook opening for receiving an item to be engaged by said hook assembly, said shank portion having a weldable base to allow the hook assembly to be used as a weld-on attachment point;
said free end portion of the hook body having a tip end portion with a through passage comprising a key slot; 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, said pin member comprising a protrusion that mates with said key slot when the pin member is rotated to a first position to allow said pin member to be received in and removed from said through passage, and said protrusion serving as a locking structure that prevents said pin member from being removed from said through passage when said pin member is rotated away from said first position;
wherein said removable pin assembly comprises a lynch pin with a spring retainer 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, 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 an intermediate portion of the spring retainer is held by spring force against an outer surface of the lynch pin and abutting portions of the spring retainer are 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, and wherein said protrusion on said lynch pin is arranged to abut a periphery of the through passage in the tip end portion of the hook body when serving as a locking structure to prevent the lynch pin from being removed from said through passage when the lynch pin is rotated away from said first position.