Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1995-02-21
1997-01-14
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 32, 411 60, F16B 1304, F16B 1306
Patent
active
055932614
ABSTRACT:
A fail-safe anchor bolt assembly installable in a pre-drilled hole in masonry to fasten a fixture or other object thereto, the assembly remaining securely anchored even should the hole later be enlarged as a result of a crack developed in the masonry. The assembly includes a bolt having a head engageable by a torque tool to turn the bolt and a shank extending from the head loosely encircled by an expansible shell whose normal outer diameter is close to that of the drilled hole. Threadably received on the rear end of the shank adjacent the shell is a conical frustrum-shaped wedge nut effectively divided into a leading zone and a trailing zone. The leading zone has a maximum diameter substantially equal to the normal outer diameter of the shell whereby in the course of installing the assembly as the bolt is turned to advance the leading zone of the nut into the shell, the shell is then expanded against the wall of the hole to produce an anchoring force. The trailing zone has a maximum diameter fractionally exceeding the predetermined diameter of the hole whereby should a crack later develop in the masonry resulting in enlargement of the drilled hole, the object loading the bolt then pulls the trailing zone of the wedge into the shell to effect further expansion thereof to maintain the anchoring force.
REFERENCES:
patent: 4195547 (1980-04-01), Giannuzzi
patent: 4537541 (1985-08-01), Giannuzzi
patent: 4720224 (1988-07-01), Peterken
patent: 4854793 (1989-08-01), Olivier et al.
Giannuzzi Anthony C.
Giannuzzi Louis N.
Ebert Michael
Wilson Neill R.
LandOfFree
Fail-safe anchor bolt assembly for cracked masonry does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fail-safe anchor bolt assembly for cracked masonry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fail-safe anchor bolt assembly for cracked masonry will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1383726