Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1981-09-29
1985-05-28
Taylor, Dennis L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
405259, 411 44, 411 55, E21D 2000, E21D 2100
Patent
active
045197350
ABSTRACT:
An expansion anchor (3) is provided for retention in an approximately cylindrical well hole (7) having a conical enlargement (9) at a distance from the well opening and widening toward the well hole floor. The expansion anchor (3) is provided on its sleeve or ring-shaped latch supporting member (21) with at least two latches (31) flaring downhole and adapted to be deflected into the enlargement (9). Screwed onto a threaded spindle (11) extending through the latch supporting member (21) is an expansion cone (23) tapering up to the well opening, by means of which the latches (31) are urged into surface engagement with the conical enlargement (9) in the wall of the well hole. The expansion cone (23) is provided with an abutment (33) facing uphole, and the latch supporting member or the latches are provided with an oppositely facing abutment (32) extending into the withdrawal path of the expansion cone (23).
REFERENCES:
patent: 1320622 (1919-11-01), Kennedy
patent: 3524379 (1970-08-01), Fischer
patent: 4011786 (1977-03-01), Liebig
patent: 4028988 (1977-06-01), Schafers
patent: 4339217 (1982-07-01), Lacey
Taylor Dennis L.
Werkzeugfabrik Fritz Machtes GmbH & Co. K.G.
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