A rivet fastener assembly is configured to securely clamp onto one or more components. The rivet fastener assembly includes a grommet including a collar and a column extending from the collar. A passage is defined through the collar and the column. The column includes component-engaging legs that are configured to fold and directly contact the component(s) when folded, and reinforcing legs that are configured to fold and reinforce the component-engaging legs when folded as the component-engaging legs directly contact the components).

A fastener includes a main body having a tubular portion and a split portion that extends from a lower end of the tubular portion, and longitudinally includes a tapered section that tapers in a direction towards the tubular portion. The fastener further includes an expansion sleeve annularly surrounding the split portion, wherein the expansion sleeve longitudinally extends to a lower end of the tapered section.

A fastener system shifting shear stresses away from a collet body and provides clamping action to targeted structures. The fastener system includes feet in the collet body that mate with openings in a sleeve at least partially surrounding the collet body. The sleeve or the collet body includes interior threads that engage with a stud that is configured to extend through the collet body and bend the feet such that they project outward from the sleeve openings in an engaged configuration.

An expansion anchor includes an anchor bolt and an expansion sleeve which encompasses the anchor bolt. The anchor bolt has an expansion-sleeve expansion region and an expansion-element expansion region. The expansion sleeve has an expansion element which is disposed on the expansion sleeve. The expansion sleeve is radially displaceable by the expansion-sleeve expansion region and the expansion element is radially displaceable by the expansion-element expansion region. The expansion element is disposed on the expansion sleeve on a side of the expansion sleeve that radially faces the anchor bolt.

An expanding pin system is described that can provide automated and/or power controlled locking and unlocking of an expanding pin assembly in a mechanical joint. For example, the expanding pin system can include an actuation assembly that includes a single actuator (e.g., motor) to control an expanding pin assembly for locking and unlocking a mechanical joint.

A fastener includes a main body having a tubular portion and a split portion that extends from a lower end of the tubular portion, and longitudinally includes a tapered section that tapers in a direction towards the tubular portion. The fastener further includes an expansion sleeve annularly surrounding the split portion, wherein the expansion sleeve longitudinally extends to a lower end of the tapered section.

An expanding pin system is described that can provide automated and/or power controlled locking and unlocking of an expanding pin assembly in a mechanical joint. For example, the expanding pin system can include an actuation assembly that includes a single actuator (e.g., motor) to control an expanding pin assembly for locking and unlocking a mechanical joint.

An expansion anchor includes an anchor bolt and an expansion sleeve which encompasses the anchor bolt. The anchor bolt has an expansion-sleeve expansion region and an expansion-element expansion region. The expansion sleeve has an expansion element which is disposed on the expansion sleeve. The expansion sleeve is radially displaceable by the expansion-sleeve expansion region and the expansion element is radially displaceable by the expansion-element expansion region. The expansion element is disposed on the expansion sleeve on a side of the expansion sleeve that radially faces the anchor bolt.

An expanding pin system is described that can provide automated and/or power controlled locking and unlocking of an expanding pin assembly in a mechanical joint. For example, the expanding pin system can include an actuation assembly that includes a single actuator (e.g., motor) to control an expanding pin assembly for locking and unlocking a mechanical joint.

A device has two anchor sleeves (3) in a concrete wall (2) accommodating two parallel anchor bolts (6) of a U-shaped step iron (1) form-fittingly. Between coupling parts formed by the anchor sleeves (3) and the anchor bolts (6), a detent assembly (7) has at least one detent tongue (8) sprung in the radial direction on one of the coupling parts (3, 6) and a detent recess (9) that receives the detent tongue (8) on the other coupling part (6, 3). A guide surface (15) for the detent tongue (8) is inclined in the peripheral direction and extends in the radial direction over the engagement depth of the detent tongue (8) adjoining the detent recess (9) at least in a peripheral direction.