Metal guide member with guide arrangement
AssigneeHilti Aktiengesellschaft
InventorsRupert Janssen, Friedrich Groeschel
Life of this patent
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Abstract
A metal guide member (1) for guiding a fastening member (12) into a hard receiving material, as it is driven by an explosive powder charge driven setting tool, has a through opening (2) with a guide arrangement formed of at least three spaced-apart, plastically deformable guidance surfaces with such surfaces having a convex shape extending in the axial direction of the through opening. The guide arrangement assures guidance of the fastening member as it is driven and, at the same time, avoids any interference with the deformation of the guidance surfaces.
Claims6
Metal guide member (1, 10) for guiding a fastening member (12) to be driven into a hard receiving material (14) by an explosive powder charge driven setting tool, said guide member have a through opening (2, 15) with a central axis and said opening having a guide arrangement (3) for guiding the fastening member (12) as it is driven into the receiving material, wherein the improvement comprises that said through opening having an axial length, said guide member includes at least three circumferentially spaced-apart plastically deformable guidance surfaces (3) with said guidance surfaces being convex and curved in the direction of the central axis and projecting inwardly toward and perpendicularly to the central axis, and said guidance surfaces (3) having an axial length substantially equal to the axial length of said through opening.
Dependencies are inferred from the claim text.