Anchor

Details Anchor Anchor

1985-06-03

1987-02-03

Holko, Thomas J.

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

Having separate expander means

Including sleeve and distinct tapered expander

411 57, F16B 1304

Patent

active

046406549

ABSTRACT:
An anchor for fastening in bore holes comprises an expander body driven into an expansion sleeve, having a slotted expansible portion, by a stay bolt to which a torque is applied to draw the expander body into the expansion sleeve. The expander body has at its trailing end a conical portion which merges into a concavely-curved portion. The angle of the concavity of the curved portion at the leading end of the expander body corresponds to a double angle of inclination of the conical portion to the central axis of the anchor.

REFERENCES:
patent: 1120367 (1914-12-01), Booraem et al.
patent: 1603292 (1926-10-01), Peirce
patent: 1850768 (1932-03-01), Peirce
patent: 3460429 (1969-08-01), LaTorre
patent: 3524379 (1970-08-01), Fischer
patent: 3855896 (1974-12-01), Kaufman
patent: 4094223 (1978-06-01), Fischer
patent: 4557649 (1985-12-01), Jeal
patent: 4560311 (1985-12-01), Herb et al.

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