Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – With hole forming means
Patent
1995-12-21
1997-12-02
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
With hole forming means
411 60, 411384, 411419, F16B 1304
Patent
active
056928645
ABSTRACT:
The present invention discloses a self-tapping anchor and a method of installing the anchor into a wall. The anchor includes a flange portion, a drill end portion, and an intermediate shank portion. The intermediate shank portion has a central bore therein for receiving a fastener. An external thread is formed on the shank portion for threading the anchor into the wall. The shank portion is divided by a slot into a pair of leg portions and the external thread is divided into a plurality of discrete thread segments. The drill end portion supports the leg portions to prevent relative twisting therebetween during anchor installation into a wall. A reduced thickness web portion, or alternatively, a through slot, is formed in the drill end portion. When the threaded fastener is threaded into the central bore, the fastener causes the drill end portion to split apart releasing the leg portions so that the leg portions diverge to provide better anchor securement to the wall.
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Crane Causie C.
Powell Kenneth Simpson
K & R Industries, Inc.
Saether Flemming
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