Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1986-10-30
1989-01-10
Wilson, Neill
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 55, 411 45, F16B 1306
Patent
active
047970448
ABSTRACT:
An anchoring system in concrete having a predrilled hole with an undercut. The anchoring system includes a cylindrical rod that is threaded at one end and has a trunk conical head at the other end. A sleeve extends over the lower portion of the cylindrical rod above the trunk conical head. The cylindrical rod is inserted into the hole so that the sleeve is adjacent to the undercut. The sleeve is fixed against being subsequently withdrawn. The cylindrical rod is then rotated relative to the sleeve thereby lifting up the trunk conical head into the sleeve so as to press against and thereby expand the sleeve outward against the walls of the undercut.
REFERENCES:
patent: 3171322 (1965-03-01), Kaplan
patent: 3855896 (1974-12-01), Kaufman
patent: 4519735 (1985-05-01), Machtle
patent: 4560311 (1985-12-01), Herb et al.
patent: 4640654 (1987-02-01), Fischer et al.
patent: 4678383 (1987-07-01), Bergner
Striker Michael J.
Wilson Neill
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