Thread lock
AssigneeThe Oakland Corporation
InventorRichard B. Wallace
Life of this patent
Estimating the term…
Abstract
The method of making self-activating thread lock structures which comprises depositing a fluid material including an uncured fluid resin in the thread grooves of a threaded member; immediately thereafter, while the material is still in fluid condition, applying a thin fluid film-forming cover coat over the fluid material; and immediately thereafter transforming the cover coat into a thin, solid, dry, non-tacky, rupturable film by brief exposure to radiation, such as ultra-violet radiation. As previously noted excellent results have been obtained using ultra-violet lamps as the source of radiation to effect substantially immediate cure of the film-forming material, but other sources are contemplated, such as electron beam radiation.
Claims32
The method of producing an externally threaded article provided with thread locking means adapted to oppose separation from a mating threaded article, which comprises depositing a fluid lock-forming material on a threaded surface of the article to cause the fluid material to be received in thread grooves and to fill the bottoms of the thread grooves, the fluid material comprising an uncured fluid resin capable of polymerization to a solid state acting between confronting thread surfaces of a threadedly engaged mating article, applying a light coating of a fluid radiation-curable film-forming material over the deposit and subjecting the coating to radiation for a few seconds to cure the coating to a thin, dry, solid, non-tacky protective film over the still-fluid deposit to permit random association of the article with like articles without sticking together.
The method of making a friction locking bolt of the type having in the thread grooves thereof circumferentially adjacent deposits of an uncured fluid resin and a fluid curing agent therefor and a thin, non-tacky, rupturable solid protective film overlying said deposits which comprises
- depositing in the thread grooves of the bolt of circumferentially spaced locations a fluid resin and a fluid curing agent therefor, applying a very thin fluid coating of an ultra-violet settable film-forming material over both of said deposits,
- and thereafter initiating a brief high-intensity ultra-violet radiation of the fluid coating to transform the fluid coating into a thin, continuous, solid, non-tacky protective film which covers the still-fluid deposits in the thread grooves of the bolt.
The method of making friction locking bolts which comprises suspending a series of bolts from an advancing conveyor, depositing a fluid resin at one side of the bolts as they advance and depositing a fluid curing agent on the opposite side of the bolts as they advance, applying an ultra-violet curable fluid film-forming material over the deposits as the bolts further advance, and subjecting the film-forming material to intense ultra-violet radiation as the bolts further advance to form thin, continuous, solid, non-tacky protective films over the still-fluid deposits thereon.
The method of producing externally threaded articles provided with thread locking means adapted to oppose separation from a mating threaded article which comprises depositing a fluid lock-forming material on the thread surface of the articles to be received in the thread grooves and to fill the bottoms of the thread grooves, the fluid material comprising a mixture of micro-encapsulated uncured fluid resin capable of polymerization to a solid state acting between confronting thread surfaces of a threadedly engaged mating article and a fluid binder, applying a light coating of a fluid radiation-curable, film-forming material over the deposit, exposing the coating for a few seconds to radiation to cure the coating to a thin, dry, solid, non-tacky protective film over the still fluid deposit to permit random association of the articles without sticking together.
Dependencies are inferred from the claim text.