Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Including settable material – Adhesive encapsulated
Patent
1997-08-04
1999-03-23
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Including settable material
Adhesive encapsulated
411258, 411412, F16B 3902
Patent
active
058850414
ABSTRACT:
A self-tapping, screw-type masonry anchor turnable into a hole drilled in masonry to fasten an object thereto, the anchor also being capable of being chemically retained in the hole to render it exceptionally resistant to pull out and vibratory forces. The anchor includes a head engageable by a tool to turn the anchor into the hole and a shank extending from the head surrounded by at least one helical cutting thread whose crest diameter exceeds the hole diameter whereby as the anchor is turned into the hole, a mating thread is then tapped in its bank. Also surrounding the shank in the space between successive convolutions of the thread is a helical zone. The shank of the anchor is coated with a release agent, and when a charge of an uncured, flowable resinous adhesive is deposited in the hole and the shank is turned therein, this adhesive then fills the helical zone, the flowable adhesive acting to lubricate and cool the cutting thread as the shank is turned into the hole. When the adhesive cures and hardens, a chemical barrier is formed in the zone which is bonded to the bank of the hole but not to the shank. Thus the anchor is mechanically retained in the hole by the cutting thread and chemically retained therein by the hardened barrier, yet the anchor can be turned out of the hole to unfasten the object from the masonry.
REFERENCES:
patent: 410697 (1889-09-01), Rogers
patent: 3207023 (1965-09-01), Knohl
patent: 3897713 (1975-08-01), Gugle
patent: 4280391 (1981-07-01), Fischer
patent: 4527932 (1985-07-01), Onasch
patent: 4544313 (1985-10-01), Grossberndt
patent: 5061136 (1991-10-01), Dixon
Giannuzzi Anthony C.
Giannuzzi Louis N.
Ebert Michael
Giannuzzi Anthony C.
Saether Flemming
LandOfFree
Chemical self-tapping, screw-type masonry anchor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chemical self-tapping, screw-type masonry anchor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical self-tapping, screw-type masonry anchor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2119682