Spreading anchor with undercut-forming cutting means

Details Spreading anchor with undercut-forming cutting means Spreading anchor with undercut-forming cutting means

1997-07-10

1998-09-15

Wilson, Neill R.

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

Having separate expander means

With hole forming means

411 55, 411 60, F16B 1304, F16B 1306

Patent

active

058070494

ABSTRACT:
A spreading anchor including an anchor rod having a stem (2) provided at its front end with a cone (3) which widens toward its free end, and a sleeve (5) which surrounds the stem (2), is axially displaceable along the anchor rod, and has a plurality of cutting tabs (6) separated from each other by axially extending slots (70, extending from a hinge point (9) in a direction of the cone (3), and having cutters (10), in regions of their free front ends, with the cutting tabs expanding radially upon the sleeve (5) being pushed onto the cone (3), with the sleeve (5) having at its free end in a region of the cutting tabs (6), and axially extending folded-over section (8) having an axial length (1) corresponding approximately to the length of the axial slots, and with the hinge (9) being located in the transition region between the folded-over section (8) and the sleeve outer surface.

REFERENCES:
patent: 4702654 (1987-10-01), Frischmann
patent: 4789284 (1988-12-01), White
patent: 4904135 (1990-02-01), Barthomeuf et al.
patent: 4971494 (1990-11-01), Gauthier et al.
patent: 5263803 (1993-11-01), Anquetin
patent: 5332346 (1994-07-01), Shinjo
European Search Report, No. EP 97 810 333.1 dated Sep. 29, 1997.
English language abstract of EP-A-0 724 085.

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