US5000636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread lock
Assignee: ND Industries Inc
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Filing: 1989-07-11
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Granted: 1991-03-19
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Expires: 2009-07-11
Abstract
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.
Inventors
- 👤 Richard B. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:14
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/36; B05D1/38; B05D7/00; B05D7/50; B05D7/52; B05D7/54; B29; B29C; B29C67/00; B29C67/24; B29C67/247; B05D2258/00; B05D2258/02; B05D3/00; B05D3/06; B05D3/061; B05D3/065; B05D3/067; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A threaded article provided with a lock-forming material to resist separation from a mating threaded member, said lock-forming material consisting essentially of first and second deposits on the threaded surface of the article, said first deposit comprising a fluid mixture of an uncured epoxy resin having throughout a radiation-curable, film-forming material comprising trimethylolpropane triacrylate and a photoinitiator, said second deposit comprising a fluid mixture of a curing agent for said uncured epoxy resin having throughout a radiation-curable, film-forming material comprising trimethylolpropane triacrylate and a photoinitiator, a portion of the radiation-curable, film-forming material extending throughout each mixture being in the form of an integral, thin, continuous, dry, substantially pin-hole free, flexible, non-tacky outer protective skin existing in and across the entire surface area of each deposit, said skin being rupturable thereby to permit intermixing of said resin, said film-forming material, and said curing agent, to cure said resin.
Claim 2
Dependent Claim
147 words
A threaded article provided with a lock-forming material to resist separation from a mating threaded member, said lock-forming material consisting essentially of first and second deposits on the threaded surface of the article, said first deposit comprising a fluid mixture of an uncured epoxy resin having throughout a radiation-curable, film-forming material comprising trimethylolpropane triacrylate and a photoinitiator, said second deposit comprising a fluid mixture of a curing agent for said uncured epoxy resin having throughout a radiation-curable, film-forming material comprising trimethylolpropane triacrylate and a photoinitiator, a portion of the radiation-curable, film-forming material extending throughout each mixture being in the form of an integral, thin, continuous, dry, substantially pin-hole free, flexible, non-tacky outer protective skin existing in and across the entire surface area of each deposit, said skin being rupturable thereby to permit intermixing of said resin, said film-forming material, and said curing agent, to cure said resin.
Claim 3
Dependent Claim
63 words
The article defined in claim 1, wherein said first deposit comprises a mixture by weight of about 15%-74% of said epoxy resin, about 20%-75% of said trimethylolpropane triacrylate, and about 1%-10% of said photoinitiator and wherein said second deposit comprises a mixture by weight of about 15%-74% of said curing agent, about 20%-75% of said trimethylolpropane triacrylate and about 1%-10% of said photoinitiator.
Claim 4
Dependent Claim
141 words
A threaded article provided with a lock-forming material to resist separation from a mating threaded member, said lock-forming material comprising a deposit on the threaded surface of the article, said deposit consisting essentially of a fluid mixture of an uncured epoxy resin, a curing agent for said uncured epoxy resin, and having throughout said deposit a radiation-curable, film-forming material comprising trimethylolpropane triacrylate and a photoinitiator, one of said uncured epoxy resin and curing agent being contained in microcapsules, a portion of said radiation-curable, film-forming material extending throughout said deposit being in the form of an integral, thin, continuous, dry, substantially pin-hole free, flexible, non-tacky outer protective skin existing in and across the entire surface area of said deposit, said film being rupturable, thereby to permit intermixing of said epoxy resin, said film-forming material, and said curing agent, to cure said resin.
Claim 5
Dependent Claim
141 words
A threaded article provided with a lock-forming material to resist separation from a mating threaded member, said lock-forming material comprising a deposit on the threaded surface of the article, said deposit consisting essentially of a fluid mixture of an uncured epoxy resin, a curing agent for said uncured epoxy resin, and having throughout said deposit a radiation-curable, film-forming material comprising trimethylolpropane triacrylate and a photoinitiator, one of said uncured epoxy resin and curing agent being contained in microcapsules, a portion of said radiation-curable, film-forming material extending throughout said deposit being in the form of an integral, thin, continuous, dry, substantially pin-hole free, flexible, non-tacky outer protective skin existing in and across the entire surface area of said deposit, said film being rupturable, thereby to permit intermixing of said epoxy resin, said film-forming material, and said curing agent, to cure said resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-18 | 1994-09-17 | 1995-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-18 | 1998-09-17 | 1999-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-18 | 2002-09-17 | 2003-03-19 | $7700.00 | Window Closed / Lapsed |