US 4,428,982 AGranted

Thread lock

AssigneeThe Oakland Corporation

InventorRichard B. Wallace

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Abstract

The method of mass producing threaded fasteners having in thread grooves thereof deposits of locking material having a dry non-tacky surface outer surface which permits bulk storage of the fasteners which comprises continuously advancing a series of fasteners through a succession of operating stations to a collection station where the fasteners may be randomly arranged, while eliminating any provision for heating or drying operation, depositing a fluid material in thread grooves of the advancing fasteners, providing a water solution of a film-forming material covering the deposits as the fasteners continue to advance, and providing a light application of a fast acting desiccant in powder form over the film-forming material to convert the film-forming material substantially without significant delay to a non-tacky protective film over the deposits.

Claims12

Dependent claims

The method of mass producing self locking threaded fasteners having material deposited in thread grooves thereof to be activated by engagement with a mating threaded member, which comprises

continuously advancing a series of threaded fasteners,
depositing in thread grooves of the fasteners as they continue to advance a fluid locking material capable of activation by engagement with mating threaded members to oppose disengagement between mated fasteners and members,
applying over the entire exposed surface of the fluid locking material in thread grooves of the fasteners a continuous thin coating of a fluid film-forming material as the fasteners continue to advance,
and applying a quick-acting film-activating material throughout the exposed surface of the film-forming material as the fasteners continue to advance to convert the fluid film-forming material to a thin continuous non-tacky protective film over the still fluid deposits of locking material in the thread grooves of the fasteners.

1 more element

Dependencies are inferred from the claim text.