Patent US3792933A successfully refreshed from Google Patents.
US3792933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-strength fastening system
Assignee: Shared Technologies Fairchild Telecom Inc
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Filing: 1971-12-20
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Granted: 1974-02-19
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Expires: 1991-12-20
Abstract
Abstract A fastening system comprising a pin with a head and a shank, the shank fitting within mating holes of a plurality of sheets or other members to be joined together, said head being positioned adjacent one of said sheets, said shank including a grooved portion extending from the sheets opposite said head. A female member is clamped about said grooved portion of said pin to join the sheets together, the female member including a malleable ductile collar initially positioned about the grooved portion of the pin and an outer sleeve of material no more ductile than said collar and having an inner diameter less than the initial outer diameter of said collar. The sleeve is initially positioned adjacent the outer end of the collar. The outer surface of the collar and the interior surface of the sleeve may include a lubricant coating. A tool is used to apply an axial force on the sleeve to move the sleeve axially along the collar toward the sheets. The sleeve thereby swages the collar radially inwardly about the grooved portion of the pin, with the sleeve remaining in a set position retaining the collar about the pin after the tool has been removed.
Inventors
- 👤 E Stencel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:09
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/02; B21J15/022; F; F16; F16B; F16B19/00; F16B19/04; F16B19/05; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/53; Y10T29/53709; Y10T29/53717; Y10T29/53726; Y10T29/5373; Y10T29/53735; Y10T403/00; Y10T403/75
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
269 words
A fastening system for joining two or more adjacent sheets together, the sheets having mating holes, said system comprising: a pin having a head and a shank, said head being positionable adjacent one of the sheets, said shank being positionable within the mating holes and including a grooved portion extending from the sheets opposite said head; a malleable inner collar member including a first portion and a second portion, the first and second portions being joined together, the first portion having a smaller outer transverse dimension than that of the second portion; the collar member being positionable about the grooved portion of said pin so that the second portion of said collar member is disposed nearer the head of the pin than the first portion; and an outer sleeve member of material no more malleable than said collar member, said sleeve member defining an opening for receiving the first portion of said collar member, and having an inner transverse dimension smaller than the outer transverse dimension of the second portion of said collar member, said sleeve member being movable axially along said collar member in the direction from the first portion of the collar member toward the head of the pin upon the application of an axial force applied to said sleeve member, to swage said collar member radially inwardly about said grooved portion of said pin, so as to create an axially outward force on the grooved portion of said pin to provide thereby preload on the sheets, said sleeve member being adapted to retain said collar member about said pin after said axial force has been removed.
Claim 2
Dependent Claim
269 words
A fastening system for joining two or more adjacent sheets together, the sheets having mating holes, said system comprising: a pin having a head and a shank, said head being positionable adjacent one of the sheets, said shank being positionable within the mating holes and including a grooved portion extending from the sheets opposite said head; a malleable inner collar member including a first portion and a second portion, the first and second portions being joined together, the first portion having a smaller outer transverse dimension than that of the second portion; the collar member being positionable about the grooved portion of said pin so that the second portion of said collar member is disposed nearer the head of the pin than the first portion; and an outer sleeve member of material no more malleable than said collar member, said sleeve member defining an opening for receiving the first portion of said collar member, and having an inner transverse dimension smaller than the outer transverse dimension of the second portion of said collar member, said sleeve member being movable axially along said collar member in the direction from the first portion of the collar member toward the head of the pin upon the application of an axial force applied to said sleeve member, to swage said collar member radially inwardly about said grooved portion of said pin, so as to create an axially outward force on the grooved portion of said pin to provide thereby preload on the sheets, said sleeve member being adapted to retain said collar member about said pin after said axial force has been removed.
Claim 3
Dependent Claim
22 words
The fastening system of claim 1 wherein the preload applied to said system is controlled by the volume of the collar member.
Claim 4
Dependent Claim
61 words
The fastening system of claim 1 wherein the preload applied to said system is a function of the distance between the sheets and a reference point on said collar member, said reference point being the inward ridge adjacent the first groove of the pin to receive swaged material of said collar member upon the initial axial movement of said sleeve member.
Claim 5
Dependent Claim
28 words
The fastening system of claim 1 wherein said sleeve member is positioned about said first portion of said collar member prior to the application of the axial force.
Claim 6
Dependent Claim
35 words
The fastening system of claim 1 wherein said second portion of said collar member is deformed about a portion of the outer end of said sleeve member to lock said collar and sleeve members together.
Claim 7
Dependent Claim
38 words
The fastening system of claim 1 wherein said collar member includes at least two relief slots extending from its inward end axially toward the outer end thereof for a portion of the axial length of said collar member.
Claim 8
Dependent Claim
37 words
The fastening system of claim 1 wherein said collar member includes an outer surface which is frusto conical in shape and slopes outwardly toward the end of said second portion of said collar member adjacent said sheets.
Claim 9
Dependent Claim
18 words
The fastening system of claim 1 wherein said sleeve member includes wrenching means on the outer surface thereof.
Claim 10
Dependent Claim
21 words
The fastening system of claim 1 wherein said sleeve member includEs an inwardly protruding annular shoulder portion adjacent its outer end.
Claim 11
Dependent Claim
17 words
The fastening system of claim 1 wherein said collar member includes a counterbore at its inner end.
Claim 12
Dependent Claim
19 words
The fastening system of claim 1 wherein said sleeve member is of relatively stronger material than said collar member.
Claim 13
Dependent Claim
34 words
The fastening system of claim 1 wherein a substantial portion of the outer surface of said collar member is coated with a lubricant prior to the application of the axial force to the sleeve.
Claim 14
Dependent Claim
40 words
The fastening system of claim 1 wherein the interior surface of said sleeve member is cylindrical and a substantial portion of said interior surface is coated with a lubricant prior to the application of the axial force to said sleeve.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |