Patent US3887990A successfully refreshed from Google Patents.
US3887990A
Expired / Lapsed
US
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Method of securing two members together with a fastener
Assignee: Individual
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Filing: 1972-12-11
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Granted: 1975-06-10
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Expires: 1992-12-11
Abstract
Abstract A fastener including a knurled stud inserted into a tapered and slit nut insert with a jam nut forced thereon for compressing the tapered nut insert into locking engagement with a knurled portion of the stud. The tapered nut insert may be provided with a knurled inner surface which coacts with the knurled stud to provide locking engagement therebetween, preventing relative movement, both rotational and axial. Both the jam nut and the tapered nut insert are shown to have helical buttressed threads to lock the jam nut in place against separating axial movement once the jam nut has been forced over the tapered nut insert and to allow disassembly through rotation of the jam nut.
Inventors
- 👤 Floyd Leroy Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
B; B23; B23P; B23P11/00; B23P11/02; F; F16; F16B; F16B15/00; F16B15/02; F16B19/00; F16B3/00; F16B3/06; F16B37/00; F16B37/08; F16B37/0807; F16B37/0864; Y; Y10; Y10S; Y10S411/00; Y10S411/918; Y10S411/924; Y10S411/929; Y10S411/935; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49945; Y10T29/49947; Y10T29/49948; Y10T29/4995; Y10T29/49954
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
215 words
A method for securing a first apertured member to a second apertured member comprising the steps of: inserting through the apertures in said members a stud having a head at one end, and an exposed portion having a roughened outer surface which extends beyond said members; sliding a nut insert having an annular inner surface over the exposed stud portion with one end thereof in abutment with the outer surface of The first member, the insert having a longitudinal slot and being formed of a deformable material; providing a jam nut having buttressed internal threads, there being a relative taper between the exterior wall of said insert and the internal threads of said jam nut; driving said jam nut over the exterior walls of the nut insert with an axially directed compressive impact sufficient to reduce the width of said slot thereby causing frictional engagement of the roughened surface of said stud and the interior surface of said nut insert sufficient to prevent either axial or rotational relative movement between the insert and the stud, said jam nut axial force being also sufficient to cause the threads of the jam nut and the exterior wall of the nut insert to be locked together to prevent direct axial separation of the jam nut and nut insert.
Claim 2
Independent Claim
215 words
A method for securing a first apertured member to a second apertured member comprising the steps of: inserting through the apertures in said members a stud having a head at one end, and an exposed portion having a roughened outer surface which extends beyond said members; sliding a nut insert having an annular inner surface over the exposed stud portion with one end thereof in abutment with the outer surface of The first member, the insert having a longitudinal slot and being formed of a deformable material; providing a jam nut having buttressed internal threads, there being a relative taper between the exterior wall of said insert and the internal threads of said jam nut; driving said jam nut over the exterior walls of the nut insert with an axially directed compressive impact sufficient to reduce the width of said slot thereby causing frictional engagement of the roughened surface of said stud and the interior surface of said nut insert sufficient to prevent either axial or rotational relative movement between the insert and the stud, said jam nut axial force being also sufficient to cause the threads of the jam nut and the exterior wall of the nut insert to be locked together to prevent direct axial separation of the jam nut and nut insert.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein the buttressed threads are helical, and said jam nut and nut insert are separable by rotating the jam nut relative to the nut insert.
Claim 4
Independent Claim
170 words
A method of releasably fastening two members together by providing a stud located to extend through the members and having an exposed serrated portion; providing a nut and insert assembly, the insert having an interior opening sufficiently large to freely slide over the serrated portion of said stud and having an outer surface which is tapered relatively to the walls of the inner surface of said nut the surface of the interior opening of the nut being threaded; slipping said insert-nut assembly over the serrated portion of said stud; and applying an axially directed compressive impact between one end of the stud and the insert-nut assembly thereby to compress the interior surface of the insert into locking engagement with the serrated portion of the stud while advancing the nut along the outer surface of the insert with the nut being locked to the insert outer surface to prevent relative axial movement by coacting threads after application of the compressive force except through rotation of said nut relative to said insert.
Claim 5
Independent Claim
170 words
A method of releasably fastening two members together by providing a stud located to extend through the members and having an exposed serrated portion; providing a nut and insert assembly, the insert having an interior opening sufficiently large to freely slide over the serrated portion of said stud and having an outer surface which is tapered relatively to the walls of the inner surface of said nut the surface of the interior opening of the nut being threaded; slipping said insert-nut assembly over the serrated portion of said stud; and applying an axially directed compressive impact between one end of the stud and the insert-nut assembly thereby to compress the interior surface of the insert into locking engagement with the serrated portion of the stud while advancing the nut along the outer surface of the insert with the nut being locked to the insert outer surface to prevent relative axial movement by coacting threads after application of the compressive force except through rotation of said nut relative to said insert.
Claim 6
Dependent Claim
44 words
The method of claim 3 wherein the exterior surface of the insert and the interior surface of the nut are formed with buttress threads having sloping surfaces which cam the nut insert into a compressive condition to surround the serrated portion of said nut.
Claim 7
Dependent Claim
39 words
The method of claim 4 wherein the insert is split axially to have a longitudinal slot and the method further comprises the step of reducing the distance between facing edges of said slot by application of said compressive force.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |