Expansion dowel

Details Expansion dowel Expansion dowel

1985-07-08

1987-02-10

Holko, Thomas J.

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

Having separate expander means

Helical anchor

411 61, 411479, F16B 1304

Patent

active

046420088

ABSTRACT:
An expansion dowel includes an axially elongated sleeve-shaped dowel body slit in the axial direction from the leading end. A spiral-shaped expansion body is located in the dowel body in the axially extending region of the slit. By axially displacing the expansion body toward the leading end of the dowel body it widens radially outwardly and in turn expands the axially slit region of the dowel body providing the required anchoring effect.

REFERENCES:
patent: 806406 (1905-12-01), Farrington
patent: 917907 (1909-04-01), Taylor
patent: 1372035 (1921-03-01), Ogden
patent: 1666805 (1928-04-01), Williams
patent: 2566573 (1951-09-01), Lyon
patent: 2823572 (1958-02-01), Gisondi
patent: 4002100 (1977-01-01), Bucheli

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