US3919916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive rivet assembly
Assignee: Illinois Tool Works Inc
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Filing: 1974-09-12
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Granted: 1975-11-18
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Expires: 1994-09-12
Abstract
Abstract A rivet assembly capable of being driven, piercing a workpiece and set with a single impact blow. The assembly includes a body member with a shank having an enlarged head at one end and a tapered penetrating point at the other end. A bore is provided in the shank to accept a drive pin with the bottom wall of the bore serving to transmit driving force from the drive pin to the body member. The shank will be weakened longitudinally and provided with a washer device or radial protuberances in the vicinity of the bottom wall to prevent radial expansion of the shank prior to penetration of the workpiece.
Inventors
- 👤 John Bert Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:30
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/04; F16B19/08; F16B19/10; F16B19/1027; F16B19/1036; F16B19/1081; B; B21; B21J; B21J15/00; B21J15/02; B21J15/025; B21J15/04; B21J15/041; F16B19/086; Y; Y10; Y10S; Y10S411/00; Y10S411/922
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
215 words
A rivet assembly capable of being driven, piercing a workpiece and set in a single operation, the assembly including a body member with a shank, a work engaging head at one extremity thereof and a work penetrating means at the other extremity, the body having a bore extending axially from the head toward the work penetrating means and terminating with driving and camming surfaces, the body including means weakening the body in a longitudinal direction thus permitting the body to be radially expanded at a predetermined driving force, the weakening means extending from the work penetrating means upwardly at least through the driving and camming surfaces, a driving pin means adapted to be received in the bore and in driving contact with the driving and camming surfaces thereof, the drive pin including a portion extending axially above the head and forming means for driving the assembly, means extending radially outwardly from the shank to prevent the body from expanding until the work penetrating means has penetrated the work, said expansion prevention means being located in generally the same axial location along the shank as the driving and camming surfaces at the extremity of the bore thereby permitting the drive pin means to be driven through the driving and camming surfaces to set the rivet assembly.
Claim 2
Dependent Claim
215 words
A rivet assembly capable of being driven, piercing a workpiece and set in a single operation, the assembly including a body member with a shank, a work engaging head at one extremity thereof and a work penetrating means at the other extremity, the body having a bore extending axially from the head toward the work penetrating means and terminating with driving and camming surfaces, the body including means weakening the body in a longitudinal direction thus permitting the body to be radially expanded at a predetermined driving force, the weakening means extending from the work penetrating means upwardly at least through the driving and camming surfaces, a driving pin means adapted to be received in the bore and in driving contact with the driving and camming surfaces thereof, the drive pin including a portion extending axially above the head and forming means for driving the assembly, means extending radially outwardly from the shank to prevent the body from expanding until the work penetrating means has penetrated the work, said expansion prevention means being located in generally the same axial location along the shank as the driving and camming surfaces at the extremity of the bore thereby permitting the drive pin means to be driven through the driving and camming surfaces to set the rivet assembly.
Claim 3
Dependent Claim
37 words
The rivet assembly of claim 1, wherein the means for preventing expansion extending radially outwardly from the shank in the vicinity of the camming and driving surfaces are generally of the same radial extent as the head.
Claim 4
Dependent Claim
24 words
The rivet assembly of claim 1 wherein the weakening means includes a slot extending axially of the shank from the work penetrating means upwardly.
Claim 5
Dependent Claim
31 words
The rivet assembly of claim 1, wherein the means for preventing expansion includes a substantially, rigid, washer-like device carried by the shank in the vicinity of the driving and camming surfaces.
Claim 6
Dependent Claim
27 words
The rivet assembly of claim 4 which includes slight shoulder means to preposition and locate the washer device in the vicinity of the driving and camming surfaces.
Claim 7
Dependent Claim
67 words
The rivet assembly of claim 1 wherein the means for preventing expansion include frangible protuberances extending radially from the shank in the vicinity of the driving and camming surfaces, the protuberances being adapted to bear against the inner wall of a driving chamber in a driving tool while capable of being disassociated from the shank upon contact with the work surface as the shank is driven therethough.
Claim 8
Dependent Claim
39 words
The rivet assembly of claim 6 wherein the frangible protuberances are located on opposing sides of the body weakening means so that the protuberances prevent the shank from expanding until the rivet assembly has exited from the driving chamber.
Claim 9
Dependent Claim
90 words
The rivet assembly of claim 1 wherein the means for preventing expansion include a substantially rigid washer fitted about the shank in the vicinity of the termination of the bore, the washer having an outer diameter substantially equal to the outer diameter of the head wherein the washer slidably abuts the driving chamber of an associated driving tool thus constraining the drive pin means from driving through the extremity of the bore and expanding the shank prematurely, the washer being driven upwardly beneath the head as the assembly is set.
Claim 10
Dependent Claim
41 words
The rivet assembly of claim 8 wherein the washer includes spring tab means which enable the assembly to exert a resilient clamping force on the work surface when the washer and head are seated against the upper surface of the work.
Claim 11
Dependent Claim
213 words
A rivet assembly capable of piercing a workpiece and being set in a single operation, including a body member with a shank, a radially enlarged work engaging head at one end and a sharp penetrating point at the other end, a bore extending axially of the shank and terminating in a bottom wall, a drive pin positioned within the bore having one extremity extending axially above the head and forming the means for driving the assembly, the opposite extremity of the pin adapted to abut the bottom wall of the bore to transmit driving force to the body, a slot extending longitudinally of the shank from the sharp penetrating point through the bottom wall of the bore, a rigid ring member surrounding the shank and fitting closely thereon, means on the shank positioning the ring member at essentially the same axial position as the bottom wall, wherein the assembly is adapted to be driven by impact force acting on the driving pin with the ring member constraining the shank from expanding until the point has penetrated the workpiece thereafter the ring may be forced upwardly beneath the head until the head and ring abut the workpiece causing the pin to be driven through the bottom wall to expand the shank beneath the workpiece.
Claim 12
Dependent Claim
213 words
A rivet assembly capable of piercing a workpiece and being set in a single operation, including a body member with a shank, a radially enlarged work engaging head at one end and a sharp penetrating point at the other end, a bore extending axially of the shank and terminating in a bottom wall, a drive pin positioned within the bore having one extremity extending axially above the head and forming the means for driving the assembly, the opposite extremity of the pin adapted to abut the bottom wall of the bore to transmit driving force to the body, a slot extending longitudinally of the shank from the sharp penetrating point through the bottom wall of the bore, a rigid ring member surrounding the shank and fitting closely thereon, means on the shank positioning the ring member at essentially the same axial position as the bottom wall, wherein the assembly is adapted to be driven by impact force acting on the driving pin with the ring member constraining the shank from expanding until the point has penetrated the workpiece thereafter the ring may be forced upwardly beneath the head until the head and ring abut the workpiece causing the pin to be driven through the bottom wall to expand the shank beneath the workpiece.
Claim 13
Dependent Claim
29 words
A rivet assembly in accordance with claim 10 wherein the ring member is a washer-like device having a radial dimension substantially equal to the radial dimension of the head.
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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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |