Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Patent
1982-02-11
1984-03-27
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Thread or shank structure
411412, F16B 3504
Patent
active
044390777
ABSTRACT:
A threaded fastener designed for anchoring imbedment into masonry structures and more particularly into masonry structures which include relatively hard aggregate. A critical distinct relationship between parameters of a fastening system such as the lead angle of the thread, the included angle of the thread, the depth of imbedment of the crest of the thread in a bore of predetermined diameter exists in order to create an adequate effective fastening system for hard aggregate masonry or concrete.
REFERENCES:
patent: 1933332 (1933-10-01), May
patent: 2572647 (1951-10-01), Merwin
patent: 3426642 (1969-02-01), Phipard, Jr.
patent: 3748949 (1973-07-01), Dreger
patent: 3937119 (1976-02-01), Ernst
patent: 3982464 (1976-09-01), Sygnator
patent: 4069730 (1978-01-01), Gutshall
Buckman Thomas W.
Dubnicka Thomas J.
Holko Thomas J.
Roche David I.
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