Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1986-07-21
1987-12-22
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 55, 411 60, F16B 1306
Patent
active
047143916
ABSTRACT:
An expansion anchor assembly for use in a borehole with an annular undercut includes a threaded anchor stud with a head part at its leading end inserted first into the borehole. Locking elements are arranged around the anchor stud at the head part, a conically shaped member is arranged to expand the locking elements in the radial direction, and an annular abutment member is in threaded engagement with the anchor stud and is arranged to axially displace the conically shaped member. By threading the abutment member toward the leading end of the anchor stud, the locking elements are displaced radially outwardly in the annular undercut. The radially outer surface of the abutment member is located within the axial projection of the radial outer surface of the conically shaped member. Accordingly, the abutment member and conically shaped member can be countersunk relative to a part to be secured to the material in which the borehole is formed. The extent of the countersink relative to the part varies according to the location of the annular undercut so that a complete anchoring of the part is ensured in every case.
REFERENCES:
patent: 445332 (1891-01-01), Phillips
patent: 1031462 (1912-07-01), Paine
patent: 2099678 (1937-11-01), Curtis
patent: 4293259 (1981-10-01), Liebig
patent: 4370081 (1983-01-01), Briles
patent: 4600036 (1986-07-01), Noe
Hilti Aktiengesellschaft
Lindsey Rodney M.
Smith Gary L.
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