US3731369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming and setting rivets integral with a layer
Assignee: Johnson Die and Engineering Co
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Filing: 1971-10-27
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Granted: 1973-05-08
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Expires: 1991-10-27
Abstract
Abstract An assembly of two layers of metallic material conjoined by an extruded elongated rivet formed in and from one layer, and further extruded over and about the perimeter of an opening in the second layer, is disclosed. The second extrusion results in a lateral deformation conditioned by the first extrusion. The extruded elongated rivet form is developed through an extrude punch operation leaving a blind hole cavity in the rivet form with a depression at the base of the cavity and a depression on the exposed outer side of the rivet form, axially aligned and in opposing relationship with the cavity depression. Conjunction is obtained with the second perforated layer when the two layers are conjunctively arranged and the rivet form is further extruded. The inventive tooling and process for forming the extruded rivet form and for conjoining the two layers are also disclosed.
Inventors
- 👤 V Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:41
CPC Classifications
B; B21; B21K; B21K23/00; B21D; B21D39/00; B21D39/03; B21D39/031; B21D39/032; B21J; B21J15/00; B21J15/02; B21J15/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49938; Y10T29/51; Y10T29/5191; Y10T29/53; Y10T29/53709; Y10T29/5377; Y10T403/00; Y10T403/49; Y10T403/4974
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
263 words
Tooling to cold extrude an elongated rivet form in and from a first layer of metallic material as a part thereof, and to further extrude said rivet form in an assembly of said first layer with a pierced second layer, 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 first metallic layer, a die adapted to receive said layer portion extruded thereinto by said extrude punch, an extrude anvil slidingly 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, 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 to produce an elongated closed base end rivet body in and from said first layer, said punch and anvil crowned end faces being axially aligned and in opposing crown relationship, a second extrusion punch and a staking anvil in a staking die, said second extrusion punch adapted to further extrude said rivet form upon said staking anvil in said staking die when said rivet form is coupled with said pierced second layer and to spread the extruded base end of said rivet body over and about the pierced opening in said second layer, whereby to conjoin said layers into an assembly.
Claim 2
Dependent Claim
263 words
Tooling to cold extrude an elongated rivet form in and from a first layer of metallic material as a part thereof, and to further extrude said rivet form in an assembly of said first layer with a pierced second layer, 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 first metallic layer, a die adapted to receive said layer portion extruded thereinto by said extrude punch, an extrude anvil slidingly 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, 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 to produce an elongated closed base end rivet body in and from said first layer, said punch and anvil crowned end faces being axially aligned and in opposing crown relationship, a second extrusion punch and a staking anvil in a staking die, said second extrusion punch adapted to further extrude said rivet form upon said staking anvil in said staking die when said rivet form is coupled with said pierced second layer and to spread the extruded base end of said rivet body over and about the pierced opening in said second layer, whereby to conjoin said layers into an assembly.
Claim 3
Dependent Claim
31 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 extrude anvil crowned end face,
Claim 4
Dependent Claim
31 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 extrude anvil crowned end face,
Claim 5
Dependent Claim
16 words
The tooling defined in claim 1, wherein said extrude punch end face is conical in form.
Claim 6
Dependent Claim
17 words
The tooling defined in claim 1, wherein said extrude punch end face is convexly curved in form.
Claim 7
Dependent Claim
43 words
forcing said layer portion in said die cavity to the inner recesses thereof against the yielding resistance of said extrude anvil and elongating said rivet form body in said die cavity over and about the projecting crowned end face of said extrude anvil,
Claim 8
Dependent Claim
43 words
forcing said layer portion in said die cavity to the inner recesses thereof against the yielding resistance of said extrude anvil and elongating said rivet form body in said die cavity over and about the projecting crowned end face of said extrude anvil,
Claim 9
Dependent Claim
34 words
producing a relatively solid closed base end rivet body in and from said first layer intermediate said extrude punch end face and said extrude anvil end face at the end of the punch stroke,
Claim 10
Dependent Claim
34 words
producing a relatively solid closed base end rivet body in and from said first layer intermediate said extrude punch end face and said extrude anvil end face at the end of the punch stroke,
Claim 11
Dependent Claim
16 words
The tooling defined in claim 1, wherein said extrude anvil end face is conical in form.
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
29 words
uniting said first metallic layer with said second layer by inserting said extruded rivet form into and through the pierced opening of said second layer over a staking die,
Claim 14
Dependent Claim
29 words
uniting said first metallic layer with said second layer by inserting said extruded rivet form into and through the pierced opening of said second layer over a staking die,
Claim 15
Dependent Claim
53 words
and further extruding said base end of said rivet body by a second extrusion punch upon a staking anvil about said pierced opeNing in said staking die to spread at least a portion of said base end over and about the edge of said opening and to conjoin said layers into an assembly.
Claim 16
Dependent Claim
53 words
and further extruding said base end of said rivet body by a second extrusion punch upon a staking anvil about said pierced opeNing in said staking die to spread at least a portion of said base end over and about the edge of said opening and to conjoin said layers into an assembly.
Claim 17
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 18
Dependent Claim
27 words
The tooling defined in claim 1, wherein said second extrude punch and staking anvil have end faces which are substantially flat and normal to the axes thereof.
Claim 19
Dependent Claim
56 words
The tooling defined in claim 1, wherein the thickness of the metal in the rivet form to be produced by and between the conjunctive motions of said extrude punch and extrude anvil is directly related to the amount of metal to be forced into said die cavity over the crowned end face of said extrude anvil.
Claim 20
Dependent Claim
73 words
The tooling defined in claim 1, wherein the thickness of the metal in the rivet form adapted to be produced by and between the conjunctive motions of said extrude punch and extrude anvil is directly related to the amount of metal to be further extruded by and between said second extrusion punch and staking anvil, whereby the extruded end of said rivet form is spread about the pierced opening in said second layer.
Claim 21
Dependent Claim
42 words
The process of cold extruding an elongated rivet form in and from a first layer of metallic material as a part thereof and conjoining said first layer to a pierced second layer into an assembly of said layers, comprising the steps of
Claim 22
Dependent Claim
42 words
The process of cold extruding an elongated rivet form in and from a first layer of metallic material as a part thereof and conjoining said first layer to a pierced second layer into an assembly of said layers, comprising the steps of
Claim 23
Dependent Claim
50 words
The process defined in claim 10, wherein said rivet body closed base end is provided on its outer axial surface with a substantial depression by said extrude punch and extrude anvil, and said base end and said depression are substantially reduced by said second extrusion punch upon said staking anvil.
Claim 24
Dependent Claim
56 words
The process defined in claim 10, and including the step of striking and entering said first layer portion with a chamfer zone on said extrude punch rearwardly of said punch crowned 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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |