Expansion dowel
AssigneeHilti Aktiengesellschaft
InventorFranz-Paul Mayr
Life of this patent
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Abstract
An expansion dowel (1) is formed of an axially extending dowel member (2) having a leading end and a trailing end. The trailing end has an outwardly projecting collar (9) with an expansion region extending axially from the trailing end toward the leading end with at least one axially extending slot (7) or breakout groove therein. The dowel member (2) has a central throughbore (3) arranged to receive an expanding element (8). Throughbore (3) has an inside thread (15) in its leading end region. The expanding element (8) is an axially extending sleeve insertable into the trailing end of the throughbore (3) for expanding the expansion region (6).
Claims5
An expansion dowel comprising an axially extending cylindrically shaped dowel member (2) having a leading end to be inserted first into a borehole, a trailing end and an axially-extending outside surface, a collar (9) formed on the trailing end of said dowel member (2) and projecting transversely of the axial direction and radially outwardly from said outside surface, said dowel member having an expansion region (6) extending axially from said trailing end toward and short of said leading end with an axially extending slot (7) therein, said expansion region having an inside diameter (d) said dowel member (2) having a central throughbore (3) between said leading and trailing ends for receiving an expanding element (8), said throughbore having an inside thread (5) in an axially extending leading end region, said expanding element comprises an axially extending sleeve (8) insertable into the expansion region (6) of said throughbore (3) through said trailing end of said dowel member (2), and said sleeve (8) having an outside diameter (e) greater than the inside diameter (d) of said expansion region, so that said expansion region is expanded when said sleeve is inserted thereon.
Dependencies are inferred from the claim text.