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 anchor, including at least one anchor body as a first element and at least one bolt as a second element, wherein the bolt has an expansion body, which pushes the anchor body radially outward when the expansion body is moved in an extraction direction in relation to the anchor body is provided. A double coating having an inner layer and an outer layer covering the inner layer is provided on one of the two elements in an area of contact with the other element, wherein the outer layer has a coefficient of friction with respect to the other element that is greater than a coefficient of friction of the inner layer with respect to the other element.

A method for anchoring an expansion anchor in a borehole is disclosed. The expansion anchor includes an anchor bolt and an expansion body on a first terminal section of the anchor bolt, an actuator disposed on a second terminal section of the anchor bolt, and an expansion sleeve disposed around the anchor bolt. In an embodiment, the method includes hammering the expansion anchor into the borehole in an insertion direction and actuating the actuator to screw the expansion body outwardly in a direction that is opposite the insertion direction such that the expansion sleeve is expanded radially outwardly and digs into a wall of the borehole and such that the expansion body digs into the wall of the borehole.

The invention provides a fastener device comprising a bolt for passing through two adjacent elements. The device comprises an expandable bushing in which the bolt extends, and at least one expander part partially engaged in the expandable bushing in order to cause said bushing to expand radially while tightening the bolt.

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.

Embodiments include a mounting assembly for securing a supported element to a wall structure having an internal thickness residing between opposing first and second sides of the wall structure. The assembly comprises a toggle anchor assembly configured to pass through a hole formed through the internal thickness; a washer configured for attachment to the hole adjacent to the first side of the wall structure, the washer comprising an open center configured to receive an extent of the toggle anchor assembly therethrough; an end assembly configured for coupling to an end portion of the toggle anchor assembly and for securing the toggle anchor assembly to the wall structure; and a receiving portion for securement of a strut assembly to the toggle anchor assembly, the strut assembly being coupled to the supported element.

A screw apparatus includes a shaft unit fastened inside a sleeve unit. The shaft unit includes a first end portion and a second end portion of a tapered shape. An outer diameter of the second end portion is greater than that of the first end portion. The sleeve unit comprises a holding portion, a locking portion and an expansion portion. The holding portion is attached onto the locking portion. An outer diameter of the holding portion is greater than that of the locking portion. The sleeve unit is locked onto an object with the locking members. A fastening unit is fastened onto the first end portion of the shaft unit to allow the second end portion thereof to move toward the expansion portion of the sleeve unit; thereby, the second end portion forces the expansion portion to expand outward in order to secure the sleeve unit onto the object.

A liquid ejecting head is mounted on a carriage in which a first positioning hole defined by a first inner surface is provided. The liquid ejecting head includes a first positioning member and a first intermediate member. The first intermediate member includes a first expansion portion being capable of being inserted into a first positioning hole and abutting on the first inner surface by expanding in a radial direction intersecting with an insertion direction of the first expansion portion. The first expansion portion includes a first insertion hole into which the first positioning member is inserted and expands in the radial direction by the first positioning member being inserted into the first insertion hole.

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 anchor includes a bolt, a spacer sleeve, an expansible sleeve, an expanding member, and a collar where the collar is disposed between the expansible sleeve and the spacer sleeve. The bolt is insertable into the spacer sleeve, the collar, and expansible sleeve in sequence and a thread of the bolt at a leading end of the bolt is connected to the expanding member to draw the expanding member into the expansible sleeve and expand the expansible sleeve radially. The collar is formed by a first material with a first hardness and a second material with a second hardness where the first hardness is different from the second hardness.