US4642012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastening assembly for roofs of soft material
Assignee: Illinois Tool Works Inc
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Filing: 1984-05-11
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Granted: 1987-02-10
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Expires: 2004-05-11
Abstract
Abstract A fastening assembly for use in attaching articles to soft materials such as gypsum based and light weight concrete roofing. The assembly includes an anchoring element which has a high thread and an axial bore in one end. The thread has an included angle of less than 45° and terminates in a sharp edge at the free end of the anchoring element. A headed screw is driven into the bore and becomes fixed to the anchoring element. A flange is integrally molded and frangibly connected to the bored end of the anchoring element, and becomes a washer upon breaking away therefrom.
Inventors
- 👤 William J. Blucher
- 👤 Richard J. Ernst
- 👤 Francis C. Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:21
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/12; F16B37/122; F16B37/125; F16B37/127; E; E04; E04D; E04D3/00; E04D3/36; E04D3/3601; E04D3/3603
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
An anchoring element comprising a generally cylindrical body having a thread thereon defining a crest diameter and a root diameter, said crest diameter being generally twice as large as said root diameter, and a bore in one end of said body adapted to receive a screw therein, said body including an integrally molded flange at one end thereof, said bore including three sections of differing diameters, a first of said three sections adapted to receive a screw head, a second section of lesser diameter than said first section, and a third section of lesser diameter than said second section.
Claim 2
Dependent Claim
99 words
An anchoring element comprising a generally cylindrical body having a thread thereon defining a crest diameter and a root diameter, said crest diameter being generally twice as large as said root diameter, and a bore in one end of said body adapted to receive a screw therein, said body including an integrally molded flange at one end thereof, said bore including three sections of differing diameters, a first of said three sections adapted to receive a screw head, a second section of lesser diameter than said first section, and a third section of lesser diameter than said second section.
Claim 3
Dependent Claim
14 words
A fastening element in accordance with claim 1 made of a molded zinc material.
Claim 4
Dependent Claim
22 words
A fastening element in accordance with claim 1 wherein said thread has an included angle of less than 45° at its crest.
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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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |