US3874070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High fatigue squeeze riveting process and apparatus therefor
Assignee: Boeing Co
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Filing: 1973-08-03
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Granted: 1975-04-01
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Expires: 1993-08-03
Abstract
Abstract A high fatigue squeeze riveting process and an apparatus for carrying out the process is disclosed. A pair of panels, or other items to be riveted together, are clamped by upper and lower clamps and a countersunk hole is drilled through the items. Thereafter, a shouldered rivet comprising a stud of two different diameters joined by a conical frustrum shoulder, is inserted into the hole. After insertion, upper and lower rams approach the rivet along vertical axially aligned paths. As the upper ram moves downward it presses the rivet into the hole until the shoulder thereof mates with the countersink region of the hole. As force is applied to the upper ram, the force on the upper clamp is transferred through the base of the rivet to the face of the countersink, and the work panels are gently pushed away from the surface of the upper clamp. Following release of the upper clamp, the upper ram stops moving and the lower ram impinges on the lower end of the rivet and applies a squeeze force thereto. As the force applied to the lower ram increases, the force applied to the lower clamp decreases until, just prior to upset, the lower clamp is released thereby subjecting the rivet to equal top and bottom forces.
Inventors
- 👤 Joseph George Falcioni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/14; B21J15/142; B21J15/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49947; Y10T29/49954; Y10T29/49956; Y10T29/49972; Y10T29/53; Y10T29/53709; Y10T29/5377
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
133 words
A high fatigue squeeze riveting process for riveting items together, said items being clamped together by applying suitable opposing clamping forces, one on either side of said items, and including a hole passing through the items, said hole being located adjacent to said clamping forces, said high fatigue squeeze riveting process comprising the steps of: pressing a rivet stud into said hole from one side thereof until said rivet stud reaches a predetermined depth of penetration in said hole; removing one clamping force from said items as said rivet stud is pressed into said hole; applying a force to said rivet stud directly opposite to said pressing direction so as to deform said rivet stud into a rivet; and, decreasing the other clamping force applied to said items as said rivet stud deforms.
Claim 2
Dependent Claim
133 words
A high fatigue squeeze riveting process for riveting items together, said items being clamped together by applying suitable opposing clamping forces, one on either side of said items, and including a hole passing through the items, said hole being located adjacent to said clamping forces, said high fatigue squeeze riveting process comprising the steps of: pressing a rivet stud into said hole from one side thereof until said rivet stud reaches a predetermined depth of penetration in said hole; removing one clamping force from said items as said rivet stud is pressed into said hole; applying a force to said rivet stud directly opposite to said pressing direction so as to deform said rivet stud into a rivet; and, decreasing the other clamping force applied to said items as said rivet stud deforms.
Claim 3
Dependent Claim
36 words
A high fatigue squeeze riveting process as claimed in claim 1 wherein said one clamping force is applied to the side of said items from which said rivet stud enters and is pressed into said hole.
Claim 4
Dependent Claim
37 words
A high fatigue squeeze riveting process as claimed in claim 2 wherein said items to be riveted together are gently moved away from said one clamping force as said rivet stud reaches its predetermined depth of penetration.
Claim 5
Dependent Claim
36 words
A high fatigue squeeze riveting process as claimed in claim 3 wherein said items to be riveted together are moved away from said other clamping force before said rivet stud becomes totally deformed into a rivet.
Claim 6
Dependent Claim
38 words
A high fatigue squeeze riveting process as claimed in claim 4 wherein said hole is countersunk to a predetermined depth on the side of said items from which the rivet stud enters and is pressed into said hole.
Claim 7
Dependent Claim
25 words
A high fatigue machine riveting process as claimed in claim 5 wherein said rivet stud has two different diameters joined by a conical frustum shoulder.
Claim 8
Dependent Claim
36 words
A high fatigue squeeze riveting process as claimed in claim 6 wherein said shoulder of said rivet stud mates with said countersunk region of said hole when said rivet stud reaches its predetermined depth of penetration.
Claim 9
Dependent Claim
26 words
A high fatigue squeeze riveting process as claimed in claim 7 wherein said opposing clamping forces surround said hole in said items to be riveted together.
Claim 10
Dependent Claim
36 words
A high fatigue squeeze riveting process as claimed in claim 1 wherein said items to be riveted together are moved away from said other clamping force before said rivet stud becomes totally deformed into a rivet.
Claim 11
Dependent Claim
38 words
A high fatigue squeeze riveting proceSs as claimed in claim 8 wherein said hole is countersunk to a predetermined depth on the side of said items from which the rivet stud enters and is pressed into said hole.
Claim 12
Dependent Claim
25 words
A high fatigue machine riveting process as claimed in claim 9 wherein said rivet stud has two different diameters joined by a conical frustum shoulder.
Claim 13
Dependent Claim
146 words
A high fatigue squeeze riveting process comprising the steps of: clamping together between a pair of clamps items to be riveted together; drilling a hole through said items to be riveted together adjacent to said pair of clamps; inserting at least partially a rivet stud into said hole from one side of said items to be riveted together; pressing said rivet stud through said hole until it reaches a predetermined depth of penetration in said hole; removing the clamping force applied by said pair of clamps to said one side of said items to be riveted together; applying a force to said rivet stud opposite to said pressing direction so as to deform said rivet stud into a rivet; and, removing the clamping force applied by said pair of clamps to the other side of said items as said rivet stud is deformed into a rivet.
Claim 14
Dependent Claim
146 words
A high fatigue squeeze riveting process comprising the steps of: clamping together between a pair of clamps items to be riveted together; drilling a hole through said items to be riveted together adjacent to said pair of clamps; inserting at least partially a rivet stud into said hole from one side of said items to be riveted together; pressing said rivet stud through said hole until it reaches a predetermined depth of penetration in said hole; removing the clamping force applied by said pair of clamps to said one side of said items to be riveted together; applying a force to said rivet stud opposite to said pressing direction so as to deform said rivet stud into a rivet; and, removing the clamping force applied by said pair of clamps to the other side of said items as said rivet stud is deformed into a rivet.
Claim 15
Dependent Claim
59 words
A high fatigue squeeze riveting process as claimed in claim 12 wherein said items to be riveted together are gently moved away from said clamping force applied by said pair of clamps to said one side of said items to be riveted together prior to the application of said force causing said rivet stud to deform into a rivet.
Claim 16
Dependent Claim
43 words
A high fatigue squeeze riveting process as claimed in claim 13 wherein said hole is countersunk on the side through which said rivet stud is inserted and wherein said rivet stud is formed of two different diameters jointed by a conical frustum shoulder.
Claim 17
Dependent Claim
35 words
A high fatigue squeeze riveting process as claimed in claim 14 wherein said shoulder of said rivet stud mates with said countersunk region of said hole when said rivet stud reaches its predetermined depth penetration.
Claim 18
Dependent Claim
224 words
Apparatus for riveting items together through a hole in said items comprising: first clamp means including a first clamp located on one side of said items; second clamp means including a second clamp located on the other side of said items, in alignment with said first clamp; first ram means including a first ram located on said one side of said items, said first ram being adapted to press a rivet stud into said hole; second ram means including a second ram located on said other side of said items, in alignment with said first ram; power supply means for supplying power to said first and second clamp means and to said first and second ram means; and, control means connected so as to control the application of power to said first and second clamp means and to said first and second ram means in a manner such that: said first and second clamps initially clamp said items together; power is rapidly withdrawn from said first clamp as power is rapidly applied to said first ram to press said rivet stud into said hole; and, power is withdrawn from said second clamp as power is applied to said second ram, said action occurring subsequent to the rapid withdrawal of power from said first clamp and the rapid application of power to said first ram.
Claim 19
Dependent Claim
224 words
Apparatus for riveting items together through a hole in said items comprising: first clamp means including a first clamp located on one side of said items; second clamp means including a second clamp located on the other side of said items, in alignment with said first clamp; first ram means including a first ram located on said one side of said items, said first ram being adapted to press a rivet stud into said hole; second ram means including a second ram located on said other side of said items, in alignment with said first ram; power supply means for supplying power to said first and second clamp means and to said first and second ram means; and, control means connected so as to control the application of power to said first and second clamp means and to said first and second ram means in a manner such that: said first and second clamps initially clamp said items together; power is rapidly withdrawn from said first clamp as power is rapidly applied to said first ram to press said rivet stud into said hole; and, power is withdrawn from said second clamp as power is applied to said second ram, said action occurring subsequent to the rapid withdrawal of power from said first clamp and the rapid application of power to said first ram.
Claim 20
Dependent Claim
41 words
A high fatigue machine riveting apparatus as claimed in claim 16 wherein said clamps are cylindrical in nature and include aligned central bores, said hole in said items to be riveted being aligned with said aligned central bores in said clamps.
Claim 21
Dependent Claim
26 words
A high fatigue squeeze riveting apparatus as claimed in claim 17 wherein said rams are aligned with and pass through the central bores in said clamps.
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |