US4310181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load-line fastener
Assignee: Individual
•
Filing: 1979-12-07
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Granted: 1982-01-12
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Expires: 1999-12-07
Abstract
Abstract A fastening assembly includes: (a) an axially elongated fastener having axially spaced differentially threaded portions respectively adapted to threadably engage threaded extents on members to be interconnected, and (b) structure extending at the side of the fastener and having interconnection therewith characterized as facilitating transmission of torque to the fastener to rotate the fastener about the axis while allowing relative axial displacement between the fastener and the structure, whereby the threaded portions are then adapted to threadably interfit the threaded extents to make-up the assembly.
Inventors
- 👤 James W. Welsh
- 👤 Robert A. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:37
CPC Classifications
F; F16; F16B; F16B31/00; F16B31/02; F16B31/028
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
216 words
In a fastening assembly, the combination comprising (a) an axially elongated fastener having axially spaced differentially threaded portions respectively adapted to threadably engage threaded extents on members (b) means at the side of the fastener characterized as facilitating transmission of torque to the fastener to rotate the fastener about said axis whereby said threaded portions are then adapted to threadably interfit said threaded extents to make-up the assembly, (c) and including one of said members defining an internal recess sunk into the member from an external face thereof, and an annular insert retained in the recess, said insert defining internal threaded extent threadably engaged by one of said fastener threaded portions, the recess having an interior portion spaced further from said member external face than the overall axial length of said one threaded portion of the fastener, said one threaded portion also extending into said recess interior portion whereby upon rotation of the fastener to make-up the members the entirety of said one threaded portion of the fastener will be displaced toward said external face but will remain in said recess, p1 (d) said means including shoulders on said fastener, said shoulders extending generally axially, the fastener maximum diameter at said shoulders being less than the maximum diameter of said one threaded portion of the fastener.
Claim 2
Dependent Claim
216 words
In a fastening assembly, the combination comprising (a) an axially elongated fastener having axially spaced differentially threaded portions respectively adapted to threadably engage threaded extents on members (b) means at the side of the fastener characterized as facilitating transmission of torque to the fastener to rotate the fastener about said axis whereby said threaded portions are then adapted to threadably interfit said threaded extents to make-up the assembly, (c) and including one of said members defining an internal recess sunk into the member from an external face thereof, and an annular insert retained in the recess, said insert defining internal threaded extent threadably engaged by one of said fastener threaded portions, the recess having an interior portion spaced further from said member external face than the overall axial length of said one threaded portion of the fastener, said one threaded portion also extending into said recess interior portion whereby upon rotation of the fastener to make-up the members the entirety of said one threaded portion of the fastener will be displaced toward said external face but will remain in said recess, p1 (d) said means including shoulders on said fastener, said shoulders extending generally axially, the fastener maximum diameter at said shoulders being less than the maximum diameter of said one threaded portion of the fastener.
Claim 3
Dependent Claim
39 words
The combination of claim 1 wherein said axial displacement of the fastener is in a relatively forward fastener make-up direction, the forward threaded portion of the fastener having greater thread pitch than the rearward threaded portion of the fastener.
Claim 4
Dependent Claim
34 words
The combination of claim 1 wherein the fastener has a precision, locally reduced cross section between said threaded portions so as to fail at said cross section in the event of excessive tension loading.
Claim 5
Dependent Claim
22 words
The combination of claim 1 including another of said members, and a crushable thrust washer between the annulus and a selected member.
Claim 6
Dependent Claim
13 words
The combination of claim 1 wherein said fastener defines an axial through opening.
Claim 7
Dependent Claim
27 words
The combination of claim 5 including another of said members, said members being tubular and having interiors which are in open communication with said fastener through opening.
Claim 8
Dependent Claim
19 words
The combination of claim 1 wherein said means includes an annulus extending in generally coaxial relation with the fastener.
Claim 9
Dependent Claim
31 words
The combination of claim 7 wherein the annulus extends about the fastener, and including the other of the members, said members having shoulders between which loading is transmitted by the annulus.
Claim 10
Dependent Claim
19 words
The combination of claim 8 wherein the fastener comprises a bolt surrounded by said members and by said annulus.
Claim 11
Dependent Claim
29 words
The combination of claim 8 wherein the annulus has grooves sunk therein at a location to collapse in response to attainment of predetermined axial loading transmission by the annulus.
Claim 12
Dependent Claim
27 words
The combination of claim 7 wherein the annulus and the fastener shoulders define interengageable flats to transmit said torque to the fastener as the annulus is rotated.
Claim 13
Dependent Claim
20 words
The combination of claim 11 wherein the annulus initially extends about the other of said threaded portions of the fastener.
Claim 14
Dependent Claim
28 words
The combination of claim 7 wherein the annulus has a frusto-conically tapering end portion adapted to interfit a corresponding frusto-conically tapered shoulder defined by one of said members.
Claim 15
Dependent Claim
14 words
The combination of claim 13 wherein said insert defines said corresponding frusto-conically tapered shoulder.
Claim 16
Dependent Claim
23 words
The combination of claim 7 wherein the annulus has frusto-conically tapering end portions to interfit correspondingly frusto-conically tapered shoulders defined by said members.
Claim 17
Dependent Claim
46 words
The combination of claim 15 including another of said members which includes a body and an annular insert therein, the inserts defining the internal threaded extents to which the fastener threaded portions are respectively threadably engaged, and the inserts also defining said corresponding frusto-conically tapered shoulders.
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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) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |