An expansion anchor includes an anchor bolt and an expansion sleeve which surrounds the anchor bolt. The expansion sleeve has an expansion tongue and an anchor tongue and the anchor bolt has a backward-pointing expansion slope for radially displacing the expansion tongue and a backward-pointing anchor slope for radially displacing the anchor tongue. The backward-pointing anchor slope extends more steeply than the backward-pointing expansion slope at least in some regions.

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 expansion anchor includes an anchor bolt and an expansion sleeve which surrounds the anchor bolt. The expansion sleeve has an expansion tongue and an anchor tongue and the anchor bolt has a backward-pointing expansion slope for radially displacing the expansion tongue and a backward-pointing anchor slope for radially displacing the anchor tongue. The backward-pointing anchor slope extends more steeply than the backward-pointing expansion slope at least in some regions.

Disclosed a connecting structure including a coating component provided with a storage cavity and a first through hole, an expansion component provided with a second through hole and a first fastener. A part of the expansion component is stored in the storage cavity; the expansion component has a rotary state and a fixed state relative to the coating component; when the expansion component is in the rotary state, the expansion component can be rotated relative to the coating component; the first fastener can pass through the first through hole and extend into the second through hole to make the expansion component expand; the outer surface of the expansion component is pressed against the inner surface of the coating component to fix the expansion component in the coating component; and the expansion component is in the fixed state relative to the coating component.

An anchoring device, in particular to a bolt anchor or an expansion anchor, includes a communication interface via which at least one item of information can be made available to an external device. It is proposed that the communication interface have at least one surface wave unit for generating an acoustic surface wave.

A blind bolt extends through a hole which extends through a first and second member. An anchor is disposed on the distal end of a blind bolt shaft, and the anchor has expanded and contracted configurations. An anchor is disposed on the distal end on a shaft and is positioned beyond the distal end of the hole engaging a surface of the second member thereby holding the shaft in the hole. A shear sleeve is disposed on the blind bolt proximate to the distal end of the shaft and has a length sufficient to extend across the second member, across the interface between the first and second members and partially across the first member. A nut is threaded on the threads of the shaft, and a collapsible cylinder is disposed on the blind bolt shaft between the sheer sleeve and nut. The collapsible cylinder and the sheer sleeve have a combined length such that when the anchor is in the expanded configuration and the sheer sleeve and the collapsible cylinder are positioned on the shaft within the hole, the collapsible cylinder pushes the sheer sleeve to a position extending across the interface between the first and second members as the nut is tightened on the shaft. The collapsible cylinder may be a deformable crushable sleeve or a telescoping sleeve.

An expandable anchor installation tool operable to install different types of expandable anchors including self-drilling expandable anchors and non-self-drilling expandable anchors.

A connecting structure includes a coating component provided with a storage cavity and a first through hole, an expansion component provided with a second through hole and a first fastener. A part of the expansion component is stored in the storage cavity. The expansion component has a rotary state and a fixed state relative to the coating component. When the expansion component is in the rotary state, the expansion component can be rotated relative to the coating component. The first fastener can pass through the first through hole and extend into the second through hole to make the expansion component expand. The outer surface of the expansion component is pressed against the inner surface of the coating component to fix the expansion component in the coating component. The expansion component is in the fixed state relative to the coating component.

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.

A locking apparatus may include: a housing including a first wall, where the first wall may be provided with a first opening; a bolt arranged inside the housing and penetrating out of the first opening; a sleeve arranged inside the housing and fitting around the bolt, where the sleeve and the bolt may be circumferentially locked and relatively movable in an axial direction; a restraint structure fixed at the housing to prevent the sleeve from departing from the housing in a direction leaving the first wall; and an elastic structure arranged inside the housing to apply an axial elastic force on the sleeve such that the sleeve and the restraint structure may be joined, where the restraint structure may be configured to circumferentially lock the sleeve when being joined with the sleeve; where two ends of the elastic structure may respectively abut against the first wall and the sleeve.