US4138921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener
Assignee: Aerpat AG
•
Filing: 1977-07-20
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Granted: 1979-02-13
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Expires: 1997-07-20
Abstract
Abstract A two-part fastener intended for securing, e.g., a panel 41 to a frame member 42 comprises a tubular shell 11 and a pin 12. The shell bore contains a tubular insert or slug 14 of resilient nylon material. The exterior of the pin is formed with annular barbs 30. When the pin is inserted into the shell, the barbs 30 engage in the resilient slug 14 to secure the pin and shell together. The pin includes a removable pintail 33 which protrudes beyond the shell and assists in the pulling of the pin into the shell by means of a suitable pulling tool.
Inventors
- 👤 Hugh K. McGauran
- 👤 John W. C. Saxon
- 👤 Raymond D. Lacey
- 👤 Frederick A. Summerlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:12
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/06; F16B5/0607; F16B5/0621; F16B5/0642; B; B62; B62D; B62D29/00; B62D29/04; B62D29/048; F16B19/00; F16B19/04; F16B19/08; F16B19/10; F16B19/1027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
389 words
A fastener for fastening together apertured members of a workpiece, comprising a shell and a pin, the shell comprising a tubular body and a tubular sleeve, p1 the tubular body being formed of strong, rigid material and having an elongate shank, a radially enlarged head for abutting one face of the workpiece at one end of the shank, a bore throughout the head and shank and an annular retaining flange at the other end of the shank, said flange extending radially inwardly into the bore of the shank and defining a central aperture coaxial with the bore, the tubular sleeve being formed of a resiliently deformable material, and disposed within the bore of the body in abutment with said retaining flange, said sleeve having throughout its length a smooth bore of a substantially constant diameter which is less than that of said central aperture and forming a continuous lining within the bore of the body, the sleeve being supported externally throughout its length by the body; the pin of the fastener being formed of rigid material and comprising an elongate shank and a radially enlarged pin-head for abutting an opposite face of the workpiece at one end of the shank, the shank of the pin having a main part adjacent to the pin-head, a pin-tail remote from the pin-head and a weakened portion between the main part and the pin-tail, the main part having integral barb means directed towards the pin-head for embeddedly engaging the tubular sleeve of the shell, that part of the pin-shank between the barb means and the end of the pin remote from the pin-head being a clearance fit in in the bore of the sleeve and the barb means being able to pass through the central aperture of the body and, by resiliently deforming the sleeve, to enter the bore of the sleeve, the shank of the pin being of sufficient length to extend entirely through members of a workpiece to be fastened together and to enable the pin-tail to be gripped and pulled by a tool for installing the fastener, so that the shank of the pin may be pulled to cause the barb means to enter the bore of the tubular sleeve at the end thereof remote from the head of the shell and to embed in non-retreat engagement in the sleeve.
Claim 2
Dependent Claim
389 words
A fastener for fastening together apertured members of a workpiece, comprising a shell and a pin, the shell comprising a tubular body and a tubular sleeve, p1 the tubular body being formed of strong, rigid material and having an elongate shank, a radially enlarged head for abutting one face of the workpiece at one end of the shank, a bore throughout the head and shank and an annular retaining flange at the other end of the shank, said flange extending radially inwardly into the bore of the shank and defining a central aperture coaxial with the bore, the tubular sleeve being formed of a resiliently deformable material, and disposed within the bore of the body in abutment with said retaining flange, said sleeve having throughout its length a smooth bore of a substantially constant diameter which is less than that of said central aperture and forming a continuous lining within the bore of the body, the sleeve being supported externally throughout its length by the body; the pin of the fastener being formed of rigid material and comprising an elongate shank and a radially enlarged pin-head for abutting an opposite face of the workpiece at one end of the shank, the shank of the pin having a main part adjacent to the pin-head, a pin-tail remote from the pin-head and a weakened portion between the main part and the pin-tail, the main part having integral barb means directed towards the pin-head for embeddedly engaging the tubular sleeve of the shell, that part of the pin-shank between the barb means and the end of the pin remote from the pin-head being a clearance fit in in the bore of the sleeve and the barb means being able to pass through the central aperture of the body and, by resiliently deforming the sleeve, to enter the bore of the sleeve, the shank of the pin being of sufficient length to extend entirely through members of a workpiece to be fastened together and to enable the pin-tail to be gripped and pulled by a tool for installing the fastener, so that the shank of the pin may be pulled to cause the barb means to enter the bore of the tubular sleeve at the end thereof remote from the head of the shell and to embed in non-retreat engagement in the sleeve.
Claim 3
Dependent Claim
21 words
A fastener according to claim 1, wherein the barb means comprises a plurality of annular barbs each directed towards the pin-head.
Claim 4
Dependent Claim
17 words
A fastener according to claim 1, wherein the barb means is immediately adjacent to the weakened portion.
Claim 5
Dependent Claim
47 words
A fastener according to claim 1, wherein the barb means is spaced from the pin-head, the pin having between the barb means and the pin-head a cylindrical collar portion having an external diameter substantially the same as the external diameter of the shank of the tubular body.
Claim 6
Dependent Claim
71 words
A fastener according to claim 4, wherein the pin has, between the pin-head and said cylindrical collar portion, tapering means for providing interfering engagement in an aperture of a workpiece member being fastened, said tapering means having a minor external diameter substantially equal to that of the shank of the body, the diameter of said tapering means increasing towards the pin-head to a maximum diameter less than that of the pin-head.
Claim 7
Dependent Claim
21 words
A fastener according to claim 1, wherein the tubular sleeve extends substantially the entire length of the bore of the 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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |