Patent US3910331A successfully refreshed from Google Patents.
US3910331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nut
Assignee: KAYNAR Manufacturing CO Inc
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Filing: 1974-08-12
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Granted: 1975-10-07
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Expires: 1994-08-12
Abstract
Abstract A nut having a flange containing rounded projections on one face adapted to be pressed into the surface of an object which is to be secured by the nut and with a hollow expansible shank projecting in the same direction as the flange concentric with respect to the threaded opening in the nut and having a scalloped surface, the irregularities of which are also of smoothly rounded form. The shank is pressed into an opening in the work and the projections displace material, some of which enters the scalloped shank area.
Inventors
- 👤 Robert H Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:48
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/04; F16B37/06; F16B37/062; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/967; Y10S411/968
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
A nut or the like adapted to be clinched to a workpiece, said nut having a flange lying in a plane substantially perpendicular to its axis and a plurality of projections on one face of the flange, said projections extending in an axial direction, characterized by workpiece-engaging portions all of which are smoothly contoured, including integral projections having generally spheroidal ends formed of relatively hard material whereby deformation of a workpiece by said projections does not create sharp angles in the surface of the workpiece, a swagable securing collar extending axially from the flange in the same direction as the projections and coaxially with the nut, said collar having radially directed recesses in its outer surface facing said projections and having smoothly rounded surfaces, the radially outer portions of said recesses being smoothly flared, whereby material displaced by the projections may flow into the recesses without being shaped to sharply angled contours.
Claim 2
Dependent Claim
152 words
A nut or the like adapted to be clinched to a workpiece, said nut having a flange lying in a plane substantially perpendicular to its axis and a plurality of projections on one face of the flange, said projections extending in an axial direction, characterized by workpiece-engaging portions all of which are smoothly contoured, including integral projections having generally spheroidal ends formed of relatively hard material whereby deformation of a workpiece by said projections does not create sharp angles in the surface of the workpiece, a swagable securing collar extending axially from the flange in the same direction as the projections and coaxially with the nut, said collar having radially directed recesses in its outer surface facing said projections and having smoothly rounded surfaces, the radially outer portions of said recesses being smoothly flared, whereby material displaced by the projections may flow into the recesses without being shaped to sharply angled contours.
Claim 3
Dependent Claim
44 words
A nut as defined in claim 1 wherein said radially directed recesses extend axially of the surface of said collar and said collar is relatively thin in a radial direction and adapted to be expanded to secure the nut with respect to the work.
Claim 4
Dependent Claim
18 words
A nut as defined in claim 2 wherein each projection is radially aligned with one of the recesses.
References Cited (Backward Citations)
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US2026757A
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US2432257A
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US2709469A
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US3117611A
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US3687501A
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |