US4687397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite rivet with strippable mandrel
Assignee: KAYNAR TECHNOLOGIES Inc A DE CORP
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Filing: 1985-05-29
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Granted: 1987-08-18
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Expires: 2005-05-29
Abstract
Abstract A composite rivet comprises an integral mandrel having a collar telescoped thereabout for controlling radial deformation of a head forming portion thereof.
Inventors
- 👤 Imre Berecz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:44
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/56; B29C65/60; B29C65/601; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/21; B29C66/40; B29C66/41; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81421; B29C66/81423; B29C66/83; B29C66/832; B29C66/8322; F; F16; F16B; F16B19/00; F16B19/04; F16B19/06; B29C66/70; B29C66/72; B29C66/721; B29C66/7212; B29C66/73; B29C66/739; B29C66/7392; B29C66/7394; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; Y; Y10; Y10S; Y10S411/00; Y10S411/90; Y10S411/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A composite rivet comprising a preformed head portion, a shear portion, a head forming portion integral with said shear portion, an integral mandrel extending from said head forming portion, and a collar having an inside diameter greater than the initial outside diameter of the head forming portion of said rivet, said collar being telescoped about and radially aligned with said head forming portion for controlling radial deformation thereof, said head forming portion being strippable from said mandrel and deformable radially outwardly to the inside diameter of said collar to lock said collar against axial movement away from the preformed head portion of said rivet.
Claim 2
Dependent Claim
104 words
A composite rivet comprising a preformed head portion, a shear portion, a head forming portion integral with said shear portion, an integral mandrel extending from said head forming portion, and a collar having an inside diameter greater than the initial outside diameter of the head forming portion of said rivet, said collar being telescoped about and radially aligned with said head forming portion for controlling radial deformation thereof, said head forming portion being strippable from said mandrel and deformable radially outwardly to the inside diameter of said collar to lock said collar against axial movement away from the preformed head portion of said rivet.
Claim 3
Dependent Claim
30 words
A composite rivet in accordance with claim 1 wherein said collar has a truncated upwardly divergent conical cavity therein for the acceptance of the head forming portion of said rivet.
Claim 4
Dependent Claim
92 words
A composite rivet comprising a preformed head portion, a shear portion, a head forming portion integral with said shear portion, an integral mandrel extending from said head forming portion, and a collar having a truncated upwardly divergent conical cavity therein telescoped about and radially aligned with said head forming portion for controlling radial deformation thereof, said collar being reinforced with circumferentially extending fibers, said head forming portion being stripped from said mandrel and extending radially outwardly to lock said collar against axial movement away from the preformed head portion of said rivet.
Claim 5
Dependent Claim
92 words
A composite rivet comprising a preformed head portion, a shear portion, a head forming portion integral with said shear portion, an integral mandrel extending from said head forming portion, and a collar having a truncated upwardly divergent conical cavity therein telescoped about and radially aligned with said head forming portion for controlling radial deformation thereof, said collar being reinforced with circumferentially extending fibers, said head forming portion being stripped from said mandrel and extending radially outwardly to lock said collar against axial movement away from the preformed head portion of said rivet.
Claim 6
Independent Claim
100 words
A method of installing a composite rivet comprising a preformed head portion, a shear portion, a head forming portion, and an integral mandrel extending centrally of said head, shear and head forming portions and away from the head portion thereof, said method comprising the steps of installing said rivet in an aperture in a workpiece, assembling a collar about the head forming portion of said rivet for controlling deformation thereof, heating said preform, and stripping said head forming portion away from said mandrel portion to form an integral head on said rivet while maintaining the mandrel portion of said rivet.
Claim 7
Independent Claim
100 words
A method of installing a composite rivet comprising a preformed head portion, a shear portion, a head forming portion, and an integral mandrel extending centrally of said head, shear and head forming portions and away from the head portion thereof, said method comprising the steps of installing said rivet in an aperture in a workpiece, assembling a collar about the head forming portion of said rivet for controlling deformation thereof, heating said preform, and stripping said head forming portion away from said mandrel portion to form an integral head on said rivet while maintaining the mandrel portion of said rivet.
References Cited (Backward Citations)
US3354260A
Cited
US3544143A
Cited
US4143580A
Cited
US4230017A
Cited
US4405256A
Cited
US4478543A
Cited
US4478544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |