发明名称 |
Fastening assembly for roofs of soft materials |
摘要 |
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 DEG 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.
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申请公布号 |
US4856951(A) |
申请公布日期 |
1989.08.15 |
申请号 |
US19860877535 |
申请日期 |
1986.06.23 |
申请人 |
ILLINOIS TOOL WORKS, INC. |
发明人 |
BLUCHER, WILLIAM J.;ERNST, RICHARD J.;PETERSON, FRANCIS C. |
分类号 |
E04D3/36;E04F13/08;F16B37/12 |
主分类号 |
E04D3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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