A post coupler expands laterally. The post coupler includes a first member that is hollow and has a first slanted face. A second member is also hollow and has a second slanted face that is abutted with the first slanted face. A rod extends through the first and second members; the rod has a head that is disposed at a head end and threads disposed at a thread end. A nut is engaged with the threads, and rotating the nut causes the first member to extend in a first lateral direction and causes the second cylindrical member to extend in a second lateral direction opposite the first lateral direction.

An expansion connector including an expandable casing, a pushing member, a compression spring, and a connecting rod. The expandable casing includes an expansion end and is in the shape of a hollow cylindrical tube provided with an axial hole and an inner wall defining the axial hole. The connecting rod includes a first end, a second end, and a stopper disposed between the first end and the second end. The pushing member, the compression spring and the connecting rod are disposed in the expandable casing; the expansion end is expandable radially outwards with respect to the axial hole; the pushing member is disposed in the axial hole and abuts against the expansion end; the pushing member includes a first male thread, and the inner wall of the expansion end includes a first female thread corresponding to the first male thread.

An anchor for wallboard installation includes an anchor body elongated along an axis, the anchor body including a driving end, a wall boring end and an internal bore running from the driving end to an internal end short of a distal tip of the wall boring end. The anchor body includes a first frusto-conical body portion, a second frusto-conical body portion running from the first frusto-conical body portion to an annular groove and an end body portion running from the annular groove toward the distal tip.

A screwable device having a retractable threaded section that has a generally tubular shaft extending along a longitudinal axis and having a front section formed with a radially outwardly open aperture and a rear section. At least one locking element comprising a threaded section and being radially displaceable in the aperture between an outer position with the threaded section projecting radially outward from the shaft and an inner position in which the threaded section is recessed within the tubular shaft. An actuating is rod coaxially slidable in the shaft between a front position and a rear position, the actuating rod having a push-button at its rod rear end, the actuating rod having a structure for engaging the locking element in at least one of its positions pressing the locking element into the outer locking position.

An expansion bolt and pivot and swivel mechanism therefor. The expansion bolt may have a base and a plurality of radially spreadable elongate elastic members cantileveredly projecting from the base at respective points of joinder to the base and terminating in respective spoons at respective points of joinder of the spoons, wherein the elongate elastic members have respective radially defined thicknesses at the points of joinder to the base that are substantially less than the corresponding thicknesses of the base, and respective radially defined thicknesses at the points of joinder of the spoons that are substantially less than the corresponding thicknesses of the spoons. The pivot and swivel mechanism may have a ring element that includes two spaced apart leg members having foot portions that turn to extend toward each other, the foot portions having respective, spaced-apart relatively enlarged ends; a swivel housing element having an open end for receiving and at least partially containing the ends of the foot portions so that the ring element can be substantially freely rotated about a pivot axis; and a capping element adapted for interlocking with the open end of the swivel housing element, the capping element having a bottom surface portion of radial symmetry about a swivel axis that is distinct from the pivot axis.

An anchor for insertion into an aperture, wherein the anchor includes a body element, two or more elongate engagement members, and a release element. The body element has a first end and an opposed second end, and the body element defines a tapered surface adjacent to a first end portion of the body element. The release element is slidably coupled to the body element. Each of the engagement members has a first end via which the engagement member is coupled to the release element, and a second end which includes a radially outwardly projecting lug. The second ends of the engagement members engage the tapered surface defined by the body element. When the release element is in a release position relative to the body element, the second ends of the engagement members are engaged with a relatively narrow portion of the tapered surface and the lugs are in a radially contracted configuration. When the release element is in an engaged position relative to the body portion, the second ends of the engagement members are engaged with a relatively wide portion of the tapered surface and the lugs are urged radially outwards from the body element by the tapered surface to form a radially expanded configuration.

An expansion bolt and pivot and swivel mechanism therefor. The expansion bolt may have a base and a plurality of radially spreadable elongate elastic members cantileveredly projecting from the base at respective points of joinder to the base and terminating in respective spoons at respective points of joinder of the spoons, wherein the elongate elastic members have respective radially defined thicknesses at the points of joinder to the base that are substantially less than the corresponding thicknesses of the base, and respective radially defined thicknesses at the points of joinder of the spoons that are substantially less than the corresponding thicknesses of the spoons. The pivot and swivel mechanism may have a ring element that includes two spaced apart leg members having foot portions that turn to extend toward each other, the foot portions having respective, spaced-apart relatively enlarged ends; a swivel housing element having an open end for receiving and at least partially containing the ends of the foot portions so that the ring element can be substantially freely rotated about a pivot axis; and a capping element adapted for interlocking with the open end of the swivel housing element, the capping element having a bottom surface portion of radial symmetry about a swivel axis that is distinct from the pivot axis.

The present disclosure provides a lockable double shear dowel connector comprising two guide tubes, two dowels, two sleeves, an open end, and two orifices. The dowels are disposed adjacent to each other and adjacent to a joint between adjacent blocks of building materials. The present disclosure further provides kits and methods for using and installing the connectors disclosed herein.

A locating pin for positioning one or more workpieces on a mounting member is provided. The locating pin includes at least one cam being radially moveable between an extended position and a retracted position. The at least one cam engages the workpiece while in the extended position to hold the workpiece in place. The at least one cam is spaced from the workpiece while in the retracted position to allow the workpiece to be positioned on, or removed from the locating pin.

An expansion bolt and pivot and swivel mechanism therefor. The expansion bolt may have a base and a plurality of radially spreadable elongate elastic members cantileveredly projecting from the base at respective points of joinder to the base and terminating in respective spoons at respective points of joinder of the spoons, wherein the elongate elastic members have respective radially defined thicknesses at the points of joinder to the base that are substantially less than the corresponding thicknesses of the base, and respective radially defined thicknesses at the points of joinder of the spoons that are substantially less than the corresponding thicknesses of the spoons. The pivot and swivel mechanism may have a ring element that includes two spaced apart leg members having foot portions that turn to extend toward each other, the foot portions having respective, spaced-apart relatively enlarged ends; a swivel housing element having an open end for receiving and at least partially containing the ends of the foot portions so that the ring element can be substantially freely rotated about a pivot axis; and a capping element adapted for interlocking with the open end of the swivel housing element, the capping element having a bottom surface portion of radial symmetry about a swivel axis that is distinct from the pivot axis.