US3771480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for extruding a rivet form in a layer of metallic material
Assignee: Johnson Die and Engineering Co
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Filing: 1971-10-27
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Granted: 1973-11-13
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Expires: 1991-10-27
Abstract
Abstract An assembly of two layers of metallic, or a metallic and a nonmetallic, material conjoined by an extruded elongated rivet formed in and from one metallic layer, staked over and about the perimeter of an opening in the second layer, is disclosed. The extruded elongated rivet may be solid or tubular and extends beyond the plane of the one layer a distance up to about 25 percent greater than the thickness of the layer from which it is formed, providing substantial rivet length to secure the second layer to the first layer. The inventive process and tooling for forming the extruded elongated rivet is also disclosed.
Inventors
- 👤 V Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:54
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/03; B21D39/031; F; F16; F16B; F16B5/00; F16B5/04; F16B5/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49938; Y10T29/49943; Y10T29/53; Y10T29/53709; Y10T29/5377; Y10T29/53991
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
157 words
Tooling to cold extrude an elongated rivet form in and from a layer of metallic material as a part thereof, comprising an extrude punch having a highly polished crowned distal end face, punch support means adapted to impel said punch end face into a portion of said metallic layer, a die adapted to receive said layer portion extruded thereinto by said extrude punch, an extrude anvil sliding movable in said die and having a highly polished crowned distal end face adapted to yieldingly resist movement of said extruded layer portion in said die, and means supporting said anvil for sliding movement in said die and for yieldingly resistant contact with said extruded layer portion, said punch adapted to force said extruded layer portion into the recesses of said die against and across said crowned distal end face of said yieldingly resistant anvil, said punch and anvil crowned end faces being axially aligned and in opposing crown relationship.
Claim 2
Dependent Claim
157 words
Tooling to cold extrude an elongated rivet form in and from a layer of metallic material as a part thereof, comprising an extrude punch having a highly polished crowned distal end face, punch support means adapted to impel said punch end face into a portion of said metallic layer, a die adapted to receive said layer portion extruded thereinto by said extrude punch, an extrude anvil sliding movable in said die and having a highly polished crowned distal end face adapted to yieldingly resist movement of said extruded layer portion in said die, and means supporting said anvil for sliding movement in said die and for yieldingly resistant contact with said extruded layer portion, said punch adapted to force said extruded layer portion into the recesses of said die against and across said crowned distal end face of said yieldingly resistant anvil, said punch and anvil crowned end faces being axially aligned and in opposing crown relationship.
Claim 3
Dependent Claim
16 words
The tooling defined in claim 1, wherein said extrude punch end face is conical in form.
Claim 4
Dependent Claim
30 words
striking and entering said layer portion with the extrusion crowned end of said punch to force said layer portion into said die cavity and upon said anvil crowned end face,
Claim 5
Dependent Claim
30 words
striking and entering said layer portion with the extrusion crowned end of said punch to force said layer portion into said die cavity and upon said anvil crowned end face,
Claim 6
Dependent Claim
41 words
forcing said layer portion in said die cavity to the inner recesses thereof against the yielding resistance of said anvil and elongating said rivet form body in said die cavity over and about the projecting crowned end face of said anvil,
Claim 7
Dependent Claim
41 words
forcing said layer portion in said die cavity to the inner recesses thereof against the yielding resistance of said anvil and elongating said rivet form body in said die cavity over and about the projecting crowned end face of said anvil,
Claim 8
Dependent Claim
17 words
The tooling defined in claim 1, wherein said extrude punch end face is convexly curved in form.
Claim 9
Dependent Claim
16 words
The tooling defined in claim 1, wherein said extrude anvil end face is conical in form.
Claim 10
Dependent Claim
24 words
and leaving a solid rivet body portion intermediate said punch end face and said anvil end face at the end of the punch stroke.
Claim 11
Dependent Claim
24 words
and leaving a solid rivet body portion intermediate said punch end face and said anvil end face at the end of the punch stroke.
Claim 12
Dependent Claim
17 words
The tooling defined in claim 1, wherein said extrude anvil end face is convexly curved in form.
Claim 13
Dependent Claim
49 words
The tooling defined in claim 1, wherein said extrude punch is provided with a chamfering portion rearwardly of its end face, to increase the amount of said layer portion forced into said die recesses and against said crowned anvil end face, whereby said rivet body length is further elongated.
Claim 14
Dependent Claim
30 words
The tooling defined in claim 1, and including a piercing punch secured in impelling support means and adapted to axially pierce said rivet body to foRm a tubular rivet body.
Claim 15
Dependent Claim
25 words
The process of cold extruding an elongated rivet form in and from a layer of metallic material as a part thereof, comprising the steps of
Claim 16
Dependent Claim
25 words
The process of cold extruding an elongated rivet form in and from a layer of metallic material as a part thereof, comprising the steps of
Claim 17
Dependent Claim
27 words
The process defined in claim 8, and including the step of axially piercing said intermediate solid portion from said rivet body to form a tubular rivet body.
Claim 18
Dependent Claim
24 words
The process defined in claim 8, wherein said layer portion is struck and entered by an extrude punch having a distal conical end face.
Claim 19
Dependent Claim
25 words
The process defined in claim 8, wherein said layer portion is struck and entered by an extrude punch having a distal convexly curved end face.
Claim 20
Dependent Claim
26 words
The process defined in claim 8, wherein said layer portion is forced into said die cavity against an extrude anvil having a distal concial end face.
Claim 21
Dependent Claim
27 words
The process defined in claim 8, wherein said layer portion is forced into said die cavity against an extrude anvil having a distal convexly curved end face.
Claim 22
Dependent Claim
53 words
The process defined in claim 8, and including the step of striking and entering said layer portion with a chamfer zone on said punch rearwardly of said punch end face to force an additional quantum of said layer portion into said die cavity, whereby to further increase the elongation of said rivet body.
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |