Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Patent
1990-10-03
1991-10-29
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Thread or shank structure
411386, 411426, F16B 3504
Patent
active
050611364
ABSTRACT:
A masonry screw anchor having two different constant diameter shank portions connected via a taper. Each portion has a set of constant diameter threads and intermediate smaller diameter protrusions with the threads and protrusions on the larger diameter shank portion being larger in diameter than the diameter of the threads and protrusions on the smaller diameter portion.
REFERENCES:
patent: 1980093 (1934-11-01), Rosenberg
patent: 3207023 (1965-09-01), Knohl
patent: 4655661 (1987-04-01), Brandt
patent: 4657460 (1987-04-01), Bien
Brown, Jr. Robert W.
Dixon Tony L.
Piacenti Frank
Starke David E.
Emhart Inc.
Smith Spencer T.
Wilson Neill R.
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