Enhanced strength screw-type masonry anchor

Details Enhanced strength screw-type masonry anchor Enhanced strength screw-type masonry anchor

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 25/04 (2006.01) F16B 25/00 (2006.01) F16B 35/04 (2006.01)

Patent

CA 2263699

An enhanced strength screw-type, self-tapping masonry anchor for fastening a fixture or other attachment to masonry in which a hole is drilled to receive the anchor. The anchor is provided with a shank having a root section surrounded by at least one helical male cutting thread whose crest diameter exceeds the diameter of the hole whereby when the anchor is screwed into the hole, the cutting thread then cuts a female thread in the bank of the hole to mechanically retain the anchor therein to impart to the anchor a holding power that resists axial pull-out forces. Formed on the root in the helical land between successive convolutions of the thread is a ridge that is raised above the root to define a compacting zone between the ridge and the bank of the hole.

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