Patent ID: 6524046
Filing Date: 2003-02-25
Classification: F16B

Abstract:
A wedge anchor comprising:a shank having a threaded section, a neck section extending forwardly and coaxially from one end of the threaded section, and having a diameter smaller than that of the threaded section, and an expander section extending forwardly and coaxially from one end of the neck section, and having a cross-section that gradually decreases along an axis of the shank in a direction toward the threaded section; a tubular expansion sleeve shorter than the shank and sleeved on the neck section; and a nut fastener for engaging the threaded section of the shank; the expander section having a surface that forms an angle greater than 8Â° with respect to the axis of the shank, and being further formed with a plurality of longitudinal ribs that project radially and outwardly, that extend along the axis of the shank, and that are angularly spaced apart from each other; the expansion sleeve being formed with a plurality of axially extending slits for engaging the longitudinal ribs on the expander section when the expander section is extended into the expansion sleeve, the slits configuring the expansion sleeve with an annular base strip portion and more than two retaining plates, each having a base edge connected to the base strip portion, a pair of parallel lateral edges, and a distal edge that interconnects the lateral edges and that extends forwardly in a direction away from the base strip portion, the lateral edges of adjacent ones of the retaining plates confining the slits, the distal edges of the adjacent ones of the retaining plates cooperating to form entrances into the slits, each of the retaining plates being formed with a boss that projects radially and outwardly with respect to the shank.