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US3837208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for blind riveting
Assignee: Avdel UK Ltd
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Filing: 1973-02-13
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Granted: 1974-09-24
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Expires: 1993-02-13
Abstract
Abstract A tubular rivet having a preformed head and a shank which extends through aligned apertures of workpiece members is set by expanding the end of the shank remote from the head to form a blind head by pulling the head of a mandrel into the bore of the shank. Then the shank together with the blind head and a central portion of the preformed head is moved in a direction towards the preformed head while restraining movement of the periphery of the preformed head, thereby deforming the preformed head and decreasing the distance between the preformed head and the blind head. An anvil for a rivet setting tool has an annular abutment for engaging the periphery of the preformed head of the rivet and a recess into which the central portion of the preformed head can enter when it is deformed.
Inventors
- 👤 J Gray
- 👤 A Davis
- 👤 R Lacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:37
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/02; B21J15/04; B21J15/043; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A method of blind riveting for fastening and drawing spaced apertured workpiece members tightly together by means of a tubular rivet having a shank and a preformed head at one end of the shank, which method comprises inserting the rivet shank through aligned apertures of the workpiece members to be fastened together so that the preformed head abuts one of the workpiece members, deforming the rivet shank to produce a blind head at the end of the shank remote from the preformed head and then deforming the preformed head of the rivet so as to move a peripheral portion thereof relative to a central portion of the preformed head in a direction towards the blind head and thereby forcing the members of the workpiece together.
Claim 2
Independent Claim
125 words
A method of blind riveting for fastening and drawing spaced apertured workpiece members tightly together by means of a tubular rivet having a shank and a preformed head at one end of the shank, which method comprises inserting the rivet shank through aligned apertures of the workpiece members to be fastened together so that the preformed head abuts one of the workpiece members, deforming the rivet shank to produce a blind head at the end of the shank remote from the preformed head and then deforming the preformed head of the rivet so as to move a peripheral portion thereof relative to a central portion of the preformed head in a direction towards the blind head and thereby forcing the members of the workpiece together.
Claim 3
Dependent Claim
57 words
A method of blind riveting according to claim 1, wherein the preformed head is deformed by moving the blind head and the shank and a central portion of the preformed head of the rivet relatively in a direction towards the preformed head, while the peripheral portion of the preformed head is maintained in relatively the same position.
Claim 4
Dependent Claim
87 words
A method of blind riveting according to claim 1, wherein the blind head is formed by pulling a mandrel into the bore of the rivet and the preformed head of the rivet is then deformed by engaging a peripheral portion of the preformed head with an abutment relative to which the mandrel is movable, and then moving the mandrel relatively towards the abutment so as to move the shank with the blind head and the central portion of the preformed head in a direction towards the abutment.
Claim 5
Dependent Claim
86 words
A method of blind riveting according to claim 3, wherein the abutment is part of an anvil adapted to engage a peripheral portion of the preformed head and having a recess adapted to overlie a central portion of the preformed rivet head in spaced relationship thereto, the abutment being arranged to engage the preformed head at a position such that the force required to deform the rivet head is greater than that required to cause the mandrel to deform the shank to form a blind head.
Claim 6
Dependent Claim
51 words
A method of blind riveting according to claim 1, wherein after the preformed head has been deformed, the shank of the rivet is radially expanded throughout its length and thereby causing the shank to contract in the axial direction so as to draw the preformed head and the blind head together.
Claim 7
Independent Claim
89 words
A method of riveting and drawing together apertured workpieces by means of a tubular rivet having a shank and a preformed head at one end of the shank, which method comprises inserting the rivet shank through aligned apertures in workpiece members to be fastened together, deforming the rivet shank to produce a blind head at the end of the shank remote from the preformed head, and then deforming the preformed head so as to reduce the distance between a peripheral portion of the preformed head and the blind head.
Claim 8
Independent Claim
89 words
A method of riveting and drawing together apertured workpieces by means of a tubular rivet having a shank and a preformed head at one end of the shank, which method comprises inserting the rivet shank through aligned apertures in workpiece members to be fastened together, deforming the rivet shank to produce a blind head at the end of the shank remote from the preformed head, and then deforming the preformed head so as to reduce the distance between a peripheral portion of the preformed head and the blind head.
Claim 9
Dependent Claim
48 words
A method according to claim 6, wherein the preformed head is deformed by moving the shank together with the blind head and a central portion of the preformed head relatively towards the preformed head while maintaining the peripheral portion of the preformed head in relatively the same position.
Claim 10
Dependent Claim
79 words
A method according to claim 7, wherein a mandrel is pulled into the end of the rivet remote from the preformed head to form the blind head and to draw the blind head into abutment with the workpiece, and the peripheral portion of the preformed head is engaged by an abutment for taking up the reaction of forces consequent upon pulling the mandrel into the bore and maintaining the peripheral portion of the head in relatively the same position.
Claim 11
Dependent Claim
30 words
A method according to claim 8, wherein after deforming the preformed head, the mandrel is drawn entirely through the bore of the rivet in the direction towards the rivet head.
Claim 12
Dependent Claim
25 words
A method according to claim 6, wherein after deforming the preformed head, the shank of the rivet is caused to contract in the axial direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |