Method for forming an expansion sleeve for an expansion dowel

Details Method for forming an expansion sleeve for an expansion dowel Method for forming an expansion sleeve for an expansion dowel

1994-12-20

1996-12-10

Crane, Daniel C.

Metal deforming

With cutting

By composite tool

72377, 72356, B21D 3106

Patent

active

055820573

ABSTRACT:
An expansion sleeve (2) for an expansion dowel (1) has an axially extending expansion region (8) with axially extending slots (5) forming tabs between these slots. To enlarge the surface of the expansion sleeve (2) for assuring the attainment of high anchoring values, the axially extending slots (5) are formed free of any gaps. The gap-free slots (5) can be formed by extrusion including radially pressing together the tabs between the slots (5).

REFERENCES:
patent: 61756 (1867-02-01), Myers
patent: 1394123 (1921-10-01), Sibley
patent: 1469977 (1923-10-01), Weaver
patent: 2289516 (1942-07-01), McCullough
patent: 2762119 (1956-09-01), Jackson
patent: 4520521 (1985-06-01), Miyake
patent: 4653132 (1987-03-01), Yamada

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