Anchors for fixing to dense concrete, masonry and the like

Details Anchors for fixing to dense concrete, masonry and the like Anchors for fixing to dense concrete, masonry and the like

1989-08-11

1990-11-27

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Externally threaded fastener element, e.g., bolt, screw, etc.

Double-ended

411l07, 411178, 411217, 411418, F16B 3500

Patent

active

049732102

ABSTRACT:
A non-expandible anchor for use in tensile zones of strong material having a compressive strength of at least 20 N/mm.sup.2 includes a cutting portion having a deep, coarse, raised, external helix formed with a cutting edge and having interruptions along the helix which act as chip breakers and permit removal of debris during insertion in a pre-prepared bore drilled in the strong material.

REFERENCES:
patent: 2281543 (1942-05-01), Baumbach
patent: 3134290 (1964-05-01), Jentoft
patent: 4223585 (1980-09-01), Barth et al.
patent: 4350464 (1982-09-01), Brothers
patent: 4381162 (1983-04-01), Hosol
patent: 4616964 (1986-10-01), Nomura
patent: 4636125 (1987-01-01), Burgard
patent: 4652194 (1987-03-01), Tajima et al.
patent: 4730970 (1988-03-01), Hyner et al.
patent: 4842467 (1989-06-01), Armstrong

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