Self-cutting expansion anchor

Details Self-cutting expansion anchor Self-cutting expansion anchor

1987-11-05

1988-12-06

Gall, Lloyd A.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Including sleeve and distinct tapered expander

411 29, 411 55, 411 60, 411 71, 411 3, 405259, F13B 1306

Patent

active

047892846

ABSTRACT:
The present invention relates to expansison anchors for solid wall installation and is specifically concerned with providing a self cutting expansion anchor which can be installed in one continuous motion by utilizing combined cutting blades and wall gripping members which cut their own undercut portion within a wall bore into which the gripping members are then permanently further expanded in positive locking engagement. Such dual-stage installation is achieved by utilizing an anchor mounting assembly having a pair or opposite-hand screw-threaded portions thereon which separately mount a blade expanding thrust member and a camming ramp on which the blades are initially expanded by axial movement of the thrust member toward the ramp and in the second stage causing the ramp to axially move toward the thrust member in further expanding relation to the blades.

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