Patent US522506A successfully refreshed from Google Patents.
Patent US5000636A successfully refreshed from Google Patents.
US5000636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread lock
Assignee: ND Industries Inc
•
Filing: 1989-07-11
•
Granted: 1991-03-19
•
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 19:49
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.
References Cited (Backward Citations)
US3704264A
Cited
US3746068A
Cited
US4091122A
Cited
US4070398A
Cited
US4228216A
Cited
US4325985A
Cited
US4536524A
Cited
US4632944A
Cited
US4484204A
Cited
US4588639A
Cited
US4847113A
Cited
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 |