Anchor bolt expansion shell

Details Anchor bolt expansion shell Anchor bolt expansion shell

1980-04-21

1982-06-29

Britts, Ramon S.

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

Having separate expander means

Including sleeve and distinct tapered expander

411 3, 411 8, F16B 1308

Patent

active

043370128

ABSTRACT:
This invention relates to an anchor bolt expansion unit and the bolt assembly using such a unit. The unit consists of a plurality of leaves connected together by a bail having a flat cap and fingers secured one to each leaf. The flat cap is dimpled to ensure an even distribution of tension applied to the fingers before the bail yields in use and also has a line of weakness to ensure that it will yield at a predetermined axial pressure. The fingers of the bail are also weakened at points in their length to a strength slightly greater than that resulting at the peripheral line of weakness.

REFERENCES:
patent: 2787931 (1957-04-01), McCabe
patent: 2799201 (1957-07-01), Genter
patent: 2870666 (1959-01-01), Dempsey

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