Expansion dowel

Details Expansion dowel Expansion dowel

1979-04-27

1981-09-15

Lyddane, William E.

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

Having separate expander means

Bulged by axially contracting ends

411 15, 411 61, 411340, 411908, F16B 1304

Patent

active

042890624

ABSTRACT:
An expansion dowel for insertion through an opening in a structural member into a hollow space within the structural member, is formed of a shaft portion, a pair of expansion arms connected to the shaft portion and a pair of webs, each joined to one of the expansion arms and connected to one another. In the inserting position, the expansion arms and webs are folded inwardly and extend along the projection of the axis of the shaft portion. When the dowel is displaced into the expansion position, the expansion arms extend approximately perpendicularly to the axis of the shaft portion and each web is disposed at an acute angle to the expansion arm to which it is joined.

REFERENCES:
patent: 3651734 (1972-03-01), McSherry
patent: 4022100 (1977-05-01), Johnson
patent: 4152968 (1979-05-01), Lassine
patent: 4181061 (1980-01-01), McSherry
patent: 4197781 (1980-04-01), Giannuzzi

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