Static structures (e.g. – buildings) – Machine or implement
Patent
1979-03-08
1981-06-02
Murtagh, John E.
Static structures (e.g., buildings)
Machine or implement
52704, E04B 149, E21D 2000
Patent
active
042703310
ABSTRACT:
An expansion dowel formed of an axially extending metal sleeve has slots extending axially from its leading end for a portion of its length toward its trailing end. The bore through the sleeve consists of a threaded portion extending from the trailing end and a frusto-conically shaped portion extending from the threaded portion to the leading end of the sleeve. After the sleeve is inserted into a borehole in a receiving material it is anchored in the borehole by displacing a frusto-conically shaped cone through the frusto-conically shaped portion of the bore toward the leading end of the sleeve. The trailing end of the cone is located within the sleeve axially inwardly of the trailing ends of the slots. A flowable substance is injected into the bore of the sleeve so that it flows outwardly through the slots into the open spaces between the outside surface of the sleeve and the surface of the borehole. The flowable substance includes a material for protecting the sleeve against corrosion.
REFERENCES:
patent: 2667037 (1954-01-01), Thomas
patent: 2992131 (1961-07-01), Bricknell
patent: 3618326 (1971-11-01), Montgomery
patent: 4157677 (1979-06-01), Deutschenbaur
Lang Gusztav
Mauthe Peter
Hilti Aktiengesellschaft
Murtagh John E.
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