US3869956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pin assembly rivet
Assignee: Avco Corp
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Filing: 1973-04-02
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Granted: 1975-03-11
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Expires: 1993-04-02
Abstract
Abstract A rivet consists of a right circular cylinder pin and a collar slidably positioned at one end thereof. The other end of the cylinder has a hemispherical cavity drilled on its longitudinal axis and the cavity is filled with a hydraulic medium. When the pin is upset by conventional riveting equipment, the cavity end of the pin expands into a countersink drilled in the workpiece. The collar end expands into a relief in the collar.
Inventors
- 👤 Robert A Breer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:11
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/04; B; B21; B21J; B21J15/00; B21J15/02; Y; Y10; Y10T; Y10T403/00; Y10T403/16; Y10T403/1633; Y10T403/49; Y10T403/4983
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
In combination with a workpiece of metallic material, said workpiece having a cylindrical hole therethrough and a countersink in one surface thereof, a fastener comprising: a cylindrical pin of titanium alloy extending through said hole, said alloy being harder than the metallic material of said workpiece, a cavity being formed in one end of said pin on the axis thereof, a hydraulic fluid medium in said cavity, said pin being upsettable by axial forces so applied that the fluid forces the cavity end of said pin radially to expand and descend into said countersink, and a collar formed with a radial relief and frictionally engaging the end of said pin opposite to said cavity end so that said axial forces extrude a marginal portion of said opposite end of said pin into said radial relief.
Claim 2
Dependent Claim
135 words
In combination with a workpiece of metallic material, said workpiece having a cylindrical hole therethrough and a countersink in one surface thereof, a fastener comprising: a cylindrical pin of titanium alloy extending through said hole, said alloy being harder than the metallic material of said workpiece, a cavity being formed in one end of said pin on the axis thereof, a hydraulic fluid medium in said cavity, said pin being upsettable by axial forces so applied that the fluid forces the cavity end of said pin radially to expand and descend into said countersink, and a collar formed with a radial relief and frictionally engaging the end of said pin opposite to said cavity end so that said axial forces extrude a marginal portion of said opposite end of said pin into said radial relief.
References Cited (Backward Citations)
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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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |