US3691897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque limiting nut
Assignee: Illinois Tool Works Inc
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Filing: 1971-03-31
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Granted: 1972-09-19
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Expires: 1991-03-31
Abstract
Abstract A rotary nut member including an aperture with internal threads and external wrenching surfaces adapted to accept torque from an axially positioned driver. Spring legs extend from the body portion of the nut to engage the driver and force it upwardly out of contact with the wrenching surfaces when the nut reaches a predetermined tension.
Inventors
- 👤 Jerry Allen Mullaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:25
CPC Classifications
F; F16; F16B; F16B31/00; F16B31/02; F16B31/024; F16B37/00; F16B37/02; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/957; Y10S411/959
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A rotary nut member comprising a body portion including an aperture adapted to receive an associated threaded fastener, a plurality of wrenching surfaces positioned circumferentially about the body portion and adapted to accept torque from an associated driver means, workpiece engaging spring legs projecting from the body portion and extending downwardly of the body portion, the length of the legs being greater than the radial distance of the wrenching surfaces from the center of the body portion the legs being axially collapsible and including means adjacent the outer extremities thereof adapted to force the associated driver means from operative association with the wrenching surfaces when the nut attains a predetermined tension.
Claim 2
Dependent Claim
111 words
A rotary nut member comprising a body portion including an aperture adapted to receive an associated threaded fastener, a plurality of wrenching surfaces positioned circumferentially about the body portion and adapted to accept torque from an associated driver means, workpiece engaging spring legs projecting from the body portion and extending downwardly of the body portion, the length of the legs being greater than the radial distance of the wrenching surfaces from the center of the body portion the legs being axially collapsible and including means adjacent the outer extremities thereof adapted to force the associated driver means from operative association with the wrenching surfaces when the nut attains a predetermined tension.
Claim 3
Dependent Claim
47 words
A sheet material nut member in accordance with claim 1 which includes a plurality of radially extending arms projecting from the body portion, the free outer extremities of the arms forming said wrenching surfaces, the length of the legs being greater than the length of the arms.
Claim 4
Dependent Claim
29 words
A rotary nut member in accordance with claim 2 wherein the body portion includes an axially extending cylindrical shank having a bore with a plurality of threads formed therein.
Claim 5
Dependent Claim
38 words
A rotary nut member in accordance with claim 3 wherein the spring legs project from the lower extremity of the body portion, the points of connection of the arms and the legs with the body being substantially co-planar.
Claim 6
Dependent Claim
37 words
A rotary nut member in accordance with claim 4 wherein the arms and legs are radially spaced by slot means which extend longitudinally of the cylindrical shank and terminate above the lower extremity of the body portion.
Claim 7
Dependent Claim
37 words
A rotary nut member in accordance with claim 3 wherein the points of connection of the legs with the body are positioned above a plane which includes the points of connection of the arms with the body.
Claim 8
Dependent Claim
26 words
A rotary nut member in accordance with claim 3 wherein the radially extending arms project in a plane perpendicular to the axis of the nut member.
Claim 9
Dependent Claim
21 words
A rotary nut member in accordance with claim 3 wherein the arms and legs are alternately positioned around the body portion.
Claim 10
Dependent Claim
17 words
A rotary nut member in accordance with claim 8 wherein there are three arms and three legs.
Claim 11
Dependent Claim
30 words
A rotary nut member in accordance with claim 9 wherein the free extremities of the spring legs include outwardly flaring portions to aid in disengaging a driver from the arms.
References Cited (Backward Citations)
US2745303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |