US3908727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener
Assignee: EVERLOCK FASTENING SYSTEMS Inc 431 STEPHENSON HIGHWAY TROY MI 48083 A CORP OF DE
•
Filing: 1974-06-07
•
Granted: 1975-09-30
•
Expires: 1994-06-07
Abstract
Abstract A threaded fastener having a shallow cavity formed in a portion of its thread and a deformable material in the cavity.
Inventors
- 👤 Thomas Dixon Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:05
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/34; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/947
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
177 words
In a threaded fastener having threads whose crests lie on an imaginary cylindrical surface: means defining a generally round, concave cavity having surface portions lying on an imaginary surface of partly spherical form and extending radially into and axially across a plurality of convolutions of the fastener thread; the rim portions of said imaginary surface of partly spherical form making relatively small angles of intersection with said imaginary cylindrical surface, a deformable material deposited in said cavity in an undeformed condition and filling said cavity; the depth of said cavity being not substantially greater than the depth of the threads, said angles of intersection being sufficiently small that upon engagement of said fastener with a complementary fastener, the bulk of said deformable material is progressively compressively deformed from its undeformed condition without being sheared away by the rim of said cavity and is compressively deformed between the two engaged fasteners such that a generally radially directed locking force is provided between the two engaged fasteners, which locking force is distributed over the entire surface of said cavity.
Claim 2
Dependent Claim
177 words
In a threaded fastener having threads whose crests lie on an imaginary cylindrical surface: means defining a generally round, concave cavity having surface portions lying on an imaginary surface of partly spherical form and extending radially into and axially across a plurality of convolutions of the fastener thread; the rim portions of said imaginary surface of partly spherical form making relatively small angles of intersection with said imaginary cylindrical surface, a deformable material deposited in said cavity in an undeformed condition and filling said cavity; the depth of said cavity being not substantially greater than the depth of the threads, said angles of intersection being sufficiently small that upon engagement of said fastener with a complementary fastener, the bulk of said deformable material is progressively compressively deformed from its undeformed condition without being sheared away by the rim of said cavity and is compressively deformed between the two engaged fasteners such that a generally radially directed locking force is provided between the two engaged fasteners, which locking force is distributed over the entire surface of said cavity.
Claim 3
Dependent Claim
16 words
The inventioN defined in claim 1 wherein the rim of said cavity is elliptical in shape.
References Cited (Backward Citations)
US2533894A
Cited
US3227198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |