US 5,344,268 A · Anchor for anchoring in a drilled hole in concrete via a joining composition

Abstract

The anchor for anchoring in a drilled hole in concrete via a joining composition, includes a threaded bolt consisting of a straight shank portion having an expander cone at one end thereof to be inserted in the drilled hole and a threaded portion at the other end, the expander cone having an outer surface and an end face and widening toward the end face; an expandable sleeve arranged on the threaded bolt enclosing the expander cone and structured to be expanded by the expander cone and a plastic covering on the end face and the outer surface of the expander cone and an adjoining part of the straight shank portion. The complete plastic covering over the expander cone and the adjoining part of the straight shank portion ensures that the joining composition does not bond the expandable sleeve to the threaded bolt, thus hindering subsequent expansion of the expandable sleeve by the expander cone due to crack formation at the drilled hole.

Claims13

Dependent claims

Anchor for anchoring in a drilled hole in concrete in which a joining composition is provided to produce an adhesive bond between a wall of the drilled hole and the anchor when the anchor is inserted in the drilled hole during said anchoring, said anchor comprising a threaded bolt consisting of a straight shank portion and an expander cone adjoining said straight shank portion at one end of said threaded bolt to be inserted in a joining composition provided in a drilled hole in concrete for anchoring, said expander cone having an outer surface and an end face and widening toward said end face;

an expandable sleeve arranged on the threaded bolt enclosing the expander cone and provided with means for facilitating expansion of said expandable sleeve by the expander cone, and a plastic covering on the end face and the outer surface of the expander cone and on a part of said straight shank portion adjacent to said expander cone so that the joining composition does not form an adhesive bond between the threaded bolt and the expandable sleeve.

Anchor and hardenable joining composition for anchoring in a drilled hole in concrete, comprising

a hardenable joining composition provided in a drilled hole in concrete;
and
an anchor comprising a threaded bolt consisting of a straight shank portion, an expander cone adjoining said straight shank portion at one end of said threaded bolt to be inserted in the joining composition provided in the drilled hole and a threaded portion at an end of said threaded bolt remote from said expander cone, said expander cone having an outer surface and an end face and widening toward said end face;
an expandable sleeve arranged on the threaded bolt enclosing the expander cone, extending to said threaded portion over said straight shank portion and provided with means for facilitating expansion of said expandable sleeve by the expander cone when the expander cone is drawn into said expandable sleeve and a plastic covering on the end face and the outer surface of the expander cone and on a part of said straight shank portion adjoining said expander cone so that, when said anchor is inserted in said hardenable joining composition, the joining composition does not form an adhesive bond between the threaded bolt and the expandable sleeve but holds the anchor in the drilled hole after anchoring.

1 more element

Dependencies are inferred from the claim text.

Anchor for anchoring in a drilled hole in concrete via a joining composition

Life of this patent

Anchor for anchoring in a drilled hole in concrete via a joining composition

Life of this patent

Abstract

Claims13