Expansion dowel assembly

Details Expansion dowel assembly Expansion dowel assembly

1985-11-20

1987-06-02

Holko, Thomas J.

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

Having separate expander means

Frangible member

411 40, 411 78, 411 61, 405259, F16B 1304

Patent

active

046699350

ABSTRACT:
An expansion dowel assembly is made up of an axially elongated generally cylindrically shaped dowel body and at least one wedge-shaped expansion member formed monolithically with the dowel body. The dowel body has a first or leading end which is inserted first into a borehole within which the dowel body is to be anchored and an opposite second end. A severable web connects the expansion member to the first end of the dowel body. Before insertion into a borehole, the expansion member projects outwardly from the exterior surface of the dowel body. When the expansion dowel assembly is inserted into a borehole, the web is broken and the expansion member, now separated from the dowel body, is displaced away from the first end within a wedge-shaped recess in the exterior surface of the dowel body. When a load is attached to the trailing end of the dowel body tending to move it opposite to the insertion direction, the expansion member becomes wedged between the borehole surface and the base of the recess in the dowel body.

REFERENCES:
patent: 3427919 (1969-02-01), Lerich
patent: 3802311 (1974-04-01), Ziegler
patent: 3844194 (1974-10-01), Reinwall, Jr.
patent: 4156381 (1979-05-01), Schiefer
patent: 4464076 (1984-08-01), Leighard

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