Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – With hole forming means
Patent
1993-04-05
1995-09-12
Safavi, Michael
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
With hole forming means
411387, 411395, F16B 2510
Patent
active
054492572
ABSTRACT:
A self-drilling anchor installable in a wall by means of a screwdriver, the anchor being adapted to receive a fastener serving to hold a fixture adjacent the wall. The anchor includes an externally-threaded shank section having a head engageable by the screwdriver and a longitudinal bore to receive the fastener. Integral with the shank section and extending axially therefrom is a core drill section whose bit includes at least one cutting blade and whose outer cylindrical surface acts as guide means whereby as the anchor is turned in to the wall by a screwdriver, the cutting blade then bores a round hole therein whose bank is engaged by the cylindrical surface to ensure circularity of the drilled hole. And as the anchor continues to turn, the shank section enters and taps the drilled hole until its head engages the outer surface of the wall to complete the anchor installation.
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Ebert Michael
Safavi Michael
LandOfFree
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