Anchor bolt

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – With hole forming means

Patent

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Details

411 55, 411 65, F16B 1304, F16B 1306

Patent

active

052638030

ABSTRACT:
Sleeve anchor comprising a tapered stem increasing in section to form a head at one end, at least the end portion of the stem remote from the head being threaded, a tubular sleeve placed over said stem being retained between the head and a threaded retaining member screwed onto the threaded end of the stem and in which the retaining member may also serve to hold a component to be attached to the anchor. Ratchet teeth are provided on the inner face of the retaining member and on the end of the tubular sleeve adjacent to the retaining member whereby in operation the two sets of teeth are engaged so that the sleeve is positively rotated with the retaining member and the outer wall of the tubular sleeve is further provided with radially-directed cutting teeth which engage the walls of the bore hole into which the anchor is inserted as the tubular sleeve is simultaneously rotated and expanded by the action of the tapered stem. The action of the cutting teeth serves to enhance the grip of the anchor in the bore hole.

REFERENCES:
patent: 4518290 (1985-05-01), Frischmann et al.
patent: 4575294 (1986-03-01), Mermi et al.
patent: 4702654 (1987-10-01), Frischmann et al.
patent: 4789284 (1988-12-01), White

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