A fixing pin having top section and a stem. The stem has an expandable section and a lower element adjacent thereto and the top section comprises a ratchet mechanism. The lower element of the stem is connected to the ratchet mechanism by a flexible connector, such that operation of the ratchet mechanism moves the lower element towards the top section, thereby compressing the expandable section axially and causing it to expand radially.

A blind bolt with a bolt head, a shaft portion on which a male screw is formed, and a bolt. An outer nut having a polygonal outer surface, and an outer nut hole penetrating in the axial direction. A cylindrical valve sleeve formed with a sleeve hole and an inner nut having a cylindrical portion. A nut head portion formed at one end of the cylindrical portion, and an inner nut hole having a female screw formed in a part inside. A plurality of outer peripheral grooves, extending in the outer peripheral direction are formed on the outer circumference of the valve sleeve. The cylindrical portion of the inner nut being inserted into the sleeve hole of the valve sleeve, the tip portion of the cylindrical portion inserted into the outer nut hole of the outer nut to prevent the inner nut from rotating with respect to the outer nut.

Concrete coupling assembly comprises a base holder for being attached to a concrete forming surface, the base holder including a central opening; a coupler having one end disposed within the central opening, the coupler having an axis for being positioned substantially transverse to the forming surface, the coupler having first and second threaded bores through the one end for attachment of a threaded rod; and a separate anchor body threadedly attached to another end of the coupler.

An expansion anchoring device includes a sleeve having a through-hole, a core member, and a movable member disposed between the sleeve and the core member and partially located in the through-hole. The core member passing through the sleeve includes a connecting portion located out of the sleeve, an expansion portion, and a shaft portion connected to the connecting portion and the expansion portion. The expansion portion located in the sleeve includes a first end portion and a second end portion connected to the shaft portion. An outer diameter of the first end portion is greater than an outer diameter of the second end portion. When the expansion anchoring device is mounted in a recessing hole of a wall and the connecting portion is pulled, the expansion portion abuts against the movable member, making the movable member protrude out of the through-hole and abut against a hole wall of the recessing hole.

An expansion anchor includes an anchor bolt, an expansion sleeve as a first element where the expansion sleeve surrounds the anchor bolt, a wedge body for expanding the expansion sleeve as a second element where the wedge body is disposed on the anchor bolt, and a double coating disposed on one of the first and second elements at least in an area of contact with the other of the first and second elements. The one of the first and second elements on which the double coating is disposed is carbon steel. The double coating has a zinc flake and/or an aluminum flake top layer and a hot dip galvanized zinc, a ZnNi, or a ZnFe base layer that is covered by the zinc flake and/or the aluminum flake top layer.

Provided is an expansion-type anchor with excellent pull-out strength. The anchor comprises an anchor body 1 that has an expansion section 3 split by an inner slit 2, and a sleeve 9 to enclose and hold the expansion section 3 of the anchor body 1. The sleeve 9 is split into a plurality of follower expansion sections by an outer main slit 10 and an outer auxiliary slit 11. A group of balls 4 is disposed inside the anchor body 1, and the expansion section 3 expands into a tapered shape when the group of balls 4 is pressed by an expansion bolt 6. When a pull-out force is applied to the anchor body 1, the sleeve 9 does not retract and deforms by expanding after the retraction of the anchor body 1. As a result, the anchor body 1 is prevented from retracting by way of the sleeve 9 being sandwiched between a prepared hole 13 and the expansion section 3.

A blind bolt with a bolt head, a shaft portion on which a male screw is formed, and a bolt. An outer nut having a polygonal outer surface, and an outer nut hole penetrating in the axial direction. A cylindrical valve sleeve formed with a sleeve hole and an inner nut having a cylindrical portion. A nut head portion formed at one end of the cylindrical portion, and an inner nut hole having a female screw formed in a part inside. A plurality of outer peripheral grooves, extending in the outer peripheral direction are formed on the outer circumference of the valve sleeve. The cylindrical portion of the inner nut being inserted into the sleeve hole of the valve sleeve, the tip portion of the cylindrical portion inserted into the outer nut hole of the outer nut to prevent the inner nut from rotating with respect to the outer nut.

The present disclosure provides for a system to secure an anchor within a bore hole comprising a drill bit tool to be connected and secured to an improved setting tool head. The system is also comprised of an anchor removably secured to the setting tool head to optimize the setting strength of the anchor. The system is also comprised of bullets having preferred size ranges to further optimize the setting of various anchors.

An expansion dowel is provided, which includes at least one dowel body and a bolt, the bolt including an expansion body, which forces the dowel body radially to the outside when the expansion body is displaced in an extraction direction relative to the dowel body, a corrosion protection layer and an antifriction layer covering the corrosion protection layer being provided on the expansion body. It is also provided that the corrosion protection layer is a Zn/Ni coating or a Zn/Fe coating. A manufacturing method for an expansion dowel of this type is also provided.