US3704486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1971-04-06
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Granted: 1972-12-05
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Expires: 1991-04-06
Abstract
Abstract A fastener comprising a stud portion which is formed with a longitudinally extending slot making it radially compressible so that it can be engaged in an aperture in a first panel and a shank portion extending coaxially and oppositely from the stud portion and also formed with a longitudinally extending slot making it radially compressible so that it can be engaged in an aperture in a second panel wherein the stud portion and the shank portion are formed with facing shoulders adapted to locate behind the panel in which the said portion is engaged and the angle of inclination of the shoulder on the stud portion is greater than the angle of inclination of the shoulder on the shank portions whereby the resistance to removal of the stud portion from the aperture in the first panel is substantially greater than that of the shank portion from the aperture in the second panel.
Inventors
- 👤 Colin Francis Blacklock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:39
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/06; F16B5/0607; F16B5/0621; F16B5/065; F16B5/0642; Y; Y10; Y10S; Y10S411/00; Y10S411/904; Y10S411/908
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A fastener comprising a stud portion which is formed with a longitudinally extending slot making it radially compressible so that it can be engaged in an aperture in a first panel and a shank portion extending coaxially and oppositely from the stud portion and also formed with a longitudinally extending slot making it radially compressible so that it can be engaged in an aperture in a second panel wherein the stud portion and the shank portion are formed with facing shoulders adapted to locate behind the panel in which the said portion is engaged and the angle of inclination of the shoulder on the stud portion is greater than the angle of inclination of the shoulder on the shank portion whereby the resistance to removal of the stud portion from the aperture in the first panel is substantially greater than that of the shank portion from the aperture in the second panel.
Claim 2
Dependent Claim
152 words
A fastener comprising a stud portion which is formed with a longitudinally extending slot making it radially compressible so that it can be engaged in an aperture in a first panel and a shank portion extending coaxially and oppositely from the stud portion and also formed with a longitudinally extending slot making it radially compressible so that it can be engaged in an aperture in a second panel wherein the stud portion and the shank portion are formed with facing shoulders adapted to locate behind the panel in which the said portion is engaged and the angle of inclination of the shoulder on the stud portion is greater than the angle of inclination of the shoulder on the shank portion whereby the resistance to removal of the stud portion from the aperture in the first panel is substantially greater than that of the shank portion from the aperture in the second panel.
Claim 3
Dependent Claim
29 words
A fastener as claimed in claim 1, wherein the shoulder on the stud portion lies in a plane substantially at right angles to the longitudinal axis of the fastener.
Claim 4
Dependent Claim
19 words
A fastener as claimed in claim 2, wherein the slot in the stud portion extends into the shank portion.
Claim 5
Dependent Claim
57 words
A fastener as claimed in claim 3, wherein both the shank portion and the stud portion are oval on any transverse section therethrough and wherein both the shank portion and the stud portion are formed with three elongate slots so arranged that the shank portion and the stud portion are radially compressible along their major transverse diameters.
Claim 6
Dependent Claim
39 words
A fastener as claimed in claim 1, wherein the stud portion is formed with two said slots which form two tongues, the ends of which are directed towards the shank portion and form the shoulder on the stud portion.
Claim 7
Dependent Claim
41 words
A fastener as claimed in claim 1, wherein a body portion is provided between the stud portion and the shank portion, the body portion being adapted to limit insertion of the stud portion and the shank portion into their respective apertures.
Claim 8
Dependent Claim
52 words
A fastener as claimed in claim 1, wherein the shank portion is provided with ab abutment face between the shoulder thereon and the stud portion, arranged in a plane substantially at right angles to the longitudinal axis of the fastener and adapted to limit insertion of the stud portion into an aperture.
References Cited (Backward Citations)
US2367657A
Cited
US3181411A
Cited
GB1149675A
Cited
US3203105A
Cited
US3213500A
Cited
FR1574188A
Cited
US3577603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |