Expansion dowel

Details Expansion dowel Expansion dowel

1996-03-22

1997-11-18

Dorner, Kenneth J.

Joints and connections

Member ends joined by inserted section

Expansible section

411 45, 411 57, F16B 1304

Patent

active

056880669

ABSTRACT:
An expansion dowel includes an axially extending cylindrically-shaped expansion sleeve (2) having an axially extending expansion region (5) with one of axially extending slots or grooves therein and a central bore (4) tapering inwardly toward a leading end of the sleeve facing in the setting direction (S). The central bore (4) is shaped to receive an expanding member (6). The expanding member (6) has a trailing end face in contact with a safety element (11) for preventing axial displacement of the expanding member (6) opposite to the setting direction. The safety element (11) has a radially outer circumferential surface that can be enlarged in the circumferential direction by a pin-shaped member (7) having a conically-shaped region which can be driven in the setting direction into the safety element. The expanding member (6) is shaped at its trailing end region for receiving a leading end region (9) of the pin-shaped member (7).

REFERENCES:
patent: 3808938 (1974-05-01), Chromy
patent: 4312604 (1982-01-01), Fu et al.
patent: 4602902 (1986-07-01), Herb
patent: 4673320 (1987-06-01), Froehlich
patent: 4770580 (1988-09-01), Fischer
patent: 5628579 (1997-05-01), Forster

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