Bolt for an anchoring hole with an undercut

Details Bolt for an anchoring hole with an undercut Bolt for an anchoring hole with an undercut

1989-10-31

1990-11-20

Wilson, Neill R.

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

Having separate expander means

Including sleeve and distinct tapered expander

411 61, 411 70, F16B 1306

Patent

active

049714945

ABSTRACT:
The bolt assembly comprises a traction shaft 1 with an anchoring extremity 13, an expansion ring 2 formed by means of expansible leg elements 18,19, and a brace 3 disposed around the shaft 1 and supported against a shoulder 24 provided upon the expansion elements 18, 19 in order to provoke expansion of leg portions 22, 23 with an undercut portion of an anchoring hole. The expansion elements 18, 19 extend between the shaft 1 and the brace 3 so as to give the latter a bearing surface of the same length as the legs 22, 23. The shoulder zone 24 defines an articulation region for the legs 22, 23.
The bolt assembly is used for the fixing of pieces within a zone subject to tensile forces within a building material.

REFERENCES:
patent: 4002100 (1977-01-01), Buchell
patent: 4634326 (1987-01-01), Fischer
patent: 4673321 (1987-06-01), Herb et al.

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