Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having structure to restrict rotation of threaded – mating... – Including settable material
Patent
1989-07-11
1991-03-19
Lovering, Richard D.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having structure to restrict rotation of threaded, mating...
Including settable material
1562755, 25218311, 25218312, 411 82, 411301, 411302, 427 541, 4283215, 42840222, 522 46, 522 96, F16B 3900, F16B 3922
Patent
active
050006363
ABSTRACT:
The method of making a friction locking fastener of the type having in the thread grooves a first deposit formed of a mixture of an uncured epoxy resin and a radiation-curable, film-forming material, and a second deposit of a fluid curing agent and a radiation-curable, film-forming material. The deposits are made in the thread grooves at circumferentially spaced locations so that a very thin coating of the radiation-curable, film-forming material develops at the surface of each deposit. The deposits are subjected to high intensity ultraviolet radiation for a few seconds to transform the coatings developed on the surfaces of the deposits into thin, continuous, flexible, non-tacky protective films which cover the still fluid deposits in the thread grooves of the article. Alternatively, when one or both the resin and curing agent are micro-encapsulated. They may be contained in a single mixture which includes the radiation-curable material. That mixture, when deposited and exposed to radiation, will form a protective film at the surface. The resin will not be polymerized until the capsules are ruptured.
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Lovering Richard D.
The Oakland Corporation
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