Patent US3748696A successfully refreshed from Google Patents.
US3748696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener
Assignee: Individual
•
Filing: 1972-01-19
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Granted: 1973-07-31
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Expires: 1992-01-19
Abstract
Abstract A plastic fastener for joining objects together wherein a bolt member has a sharpened shank which pierces the object to be joined and normally outwardly projecting but inwardly flexible anchor members formed integrally on the shank to engage shoulders on a nut member. After the bolt pierces the object, the nut is forced axially onto the bolt shank, flexing the anchor members inwardly, the anchor members then springing out into engagement with internal shoulders in the bore of the nut to hold the nut onto the bolt.
Inventors
- 👤 M Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:28
CPC Classifications
B; B65; B65D; B65D63/00; B65D63/10; B65D63/1018; B65D63/1027; B65D63/1063; B65D63/1081; B65D2563/00; B65D2563/10; B65D2563/101; B65D2563/102; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1498; Y10T24/50; Y10T24/505
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
218 words
A fastener comprising: a. a bolt member having an enlarged radial head and a solid, stiff shank member extending centrally therefrom, said shank member having a uniform diameter throughout its length, said shank member then terminating in a sharpened end, b. said shank member having at least one anchor member formed integrally therewith, said anchor member starting from the surface of said shank member at a point spaced from said sharpened end so that said shank has a cylindrical surface between said poiNt and said sharpened end, said anchor member extending towards said head and having a free end normally positioned radially outwardly beyond the perimeter of said shank, said shank member having a pocket formed in the surface thereof to enable said anchor member to flex laterally thereinto, and said anchor member having sufficient lateral resilience to enable it to flex into said pocket, c. a nut member having an enlarged radial flange and a central bore thereinto, said bore in cross section having approximatley the same size and shape as the cross section of said shank, said nut having at least one shoulder formed into the surface of said central bore for abutting engagement with the free end of said anchor member when said free end thereof projects radially outwardly beyond the perimeter of said shank.
Claim 2
Dependent Claim
218 words
A fastener comprising: a. a bolt member having an enlarged radial head and a solid, stiff shank member extending centrally therefrom, said shank member having a uniform diameter throughout its length, said shank member then terminating in a sharpened end, b. said shank member having at least one anchor member formed integrally therewith, said anchor member starting from the surface of said shank member at a point spaced from said sharpened end so that said shank has a cylindrical surface between said poiNt and said sharpened end, said anchor member extending towards said head and having a free end normally positioned radially outwardly beyond the perimeter of said shank, said shank member having a pocket formed in the surface thereof to enable said anchor member to flex laterally thereinto, and said anchor member having sufficient lateral resilience to enable it to flex into said pocket, c. a nut member having an enlarged radial flange and a central bore thereinto, said bore in cross section having approximatley the same size and shape as the cross section of said shank, said nut having at least one shoulder formed into the surface of said central bore for abutting engagement with the free end of said anchor member when said free end thereof projects radially outwardly beyond the perimeter of said shank.
Claim 3
Dependent Claim
22 words
A fastener as set forth in claim 1 wherein said bolt member and said nut member are both formed of plastic material.
Claim 4
Dependent Claim
104 words
A fastener as set forth in claim 2, and further including a metal end cap removably mounted on the end of said shank, said end cap having an inner surface complementary to the sharpened end of said shank member and a conical outer surface, the diameter of the base of said conical outer surface being equal to the diameter of said cylindrical surface of said shank member and said conical outer surface of said end cap terminating at its apex in a sharpened point, the apex angle of said end cap being less than the corresponding angle of the end of said shank member.
References Cited (Backward Citations)
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Cited
US1998791A
Cited
US2104885A
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Cited
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Cited
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Cited
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Cited
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |