Hilti Aktiengesellschaft

Marc Schaeffer

Mathias Goldt

Arjen Detmer Dijkhuis

Joerg Appl

Andreas Eckstein

Matteo Spampatti

Georg Oberndorfer

Michael Selb

Cheng Chuan Lin

Simon Oppeneiger

Juergen Gebhard

Philipe Simek

Matthias Paetow

Tanja Steinberg

Simon Velten

Kathrin Sproewitz-Haefliger

Giuseppe Guida

Michael Splitt

Xingda Hu

Xiaolong Chu

Tanja Meindorfer

Kathrin Haefliger

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.

Expansion anchor

A screw nut includes a through hole defined by the screw nut, an internal thread that projects into the through hole, and a face that surrounds the through hole. At least three barcode patterns are disposed on the face where the at least three barcode patterns have an identical content.

Screw nut with barcode pattern segments

A system includes an anchor body, having a head and a hollow chamber shaft coupled to the head. The system includes a housing component configured to support the anchor body. The system also includes one or more fasteners supported by the housing component. At least one of the fasteners is coupled to the head of the anchor body, and an apex of each fastener is positioned to be above the head of the anchor body.

Systems and methods for a cast-in anchor

An anchor having a sleeve, a bolt which passes through the sleeve and at least one expansion element that is positioned in front of the sleeve and that is axially supported on the sleeve, whereby the bolt has an expansion area for the expansion element, is provided. According to the invention, it is provided for the sleeve to have a wavy shape with axial wave peaks in which the outer radius of the sleeve as well as the inner radius of the sleeve each have a maximum, and with wave valleys in which the outer radius of the sleeve as well as the inner radius of the sleeve each have a minimum.

Anchor having a wave-shaped sleeve

An expansion anchor is disclosed. The expansion anchor has a bolt having a neck region and an expansion region adjoining the neck region in which the bolt tapers down towards the neck region. The bolt has a groove in the neck region which extends along the bolt, and is at least partially surrounded by an expansion sleeve, and which has on its inside a web. The web at least partially engages in the groove in the neck region and the wall thickness of the expansion sleeve is increased locally by the web. The expansion sleeve is displaceable under radial expansion of the expansion sleeve along the bolt from the neck region into the expansion region. The web, on displacement of the expansion sleeve from the neck region, at least by region, passes into the expansion area and is forced radially outward by the expansion region.

A method for fixing an expansion anchor to a substrate includes introducing an anchoring zone and at least one part of a middle zone of a bolt of the expansion anchor into a hole in the substrate together with an expansion sleeve of the expansion anchor. The bolt is then moved relative to the expansion sleeve in a pull-out direction, as a result of which the expansion anchor is anchored to the wall of the hole. The space between the wall of the hole and the bolt is then filled to the height of at least one part of the middle zone with a curable mass such that the curable mass on the middle zone reaches up to an annular collar of the bolt, where the collar is configured as one piece with the bolt and is locally larger in cross-section, and the curable mass is cured.

Method for fixing an expansion anchor to a substrate, in which a curable mass is introduced in the annular space around the expansion anchor

An expansion anchor with a bolt as a first element and with an expansion sleeve, which at least partially surrounds the bolt, as a second element, is disclosed. The bolt has an expansion region for widening the expansion sleeve. One of the two elements has a groove running in the longitudinal direction of the expansion anchor and the other element has a projection, which engages at least sectionally in the groove. The groove has a narrowing, which inhibits an axial movement of the expansion sleeve relative to the bolt.

Helical sleeve of an anchor

An expansion bolt including an anchor bolt having an expansion section, and further including an expansion sleeve which surrounds the anchor bolt and which can be expanded by retracting the expansion section, and a spring element arranged on the anchor bolt. The spring element can be tensioned by inserting the anchor bolt into a bore hole and can retract the expansion section of the anchor bolt into the expansion sleeve when it is released. An indicator element indicates when a rated tension of the spring element is reached.

Expansion bolt

A sensor arrangement, for example, on an anchor bolt, including at least one sensor (). At least one bypass element () with a dilatant material is arranged in the area of the sensor (), whereby impact forces that act upon the sensor () can be dissipated via the dilatant material of the bypass element ().

Sensor arrangement, for example, on an anchor bolt

A direct tension indicator (), including a base element () and a cover element () that is arranged on the base element () and at least one indicator element () that is arranged between the base element () and the cover element () in order to display an axial force acting between the base element and the cover element. The indicator element () includes a dilatant material.

Load-indicating washer

When it comes to an expansion plug () including an anchor bolt () with an expansion element () on a first end section () of the anchor bolt () having a longitudinal axis (), preferably also including at least one force-applier () on the anchor bolt () in order to hold loads, and also including an expansion sleeve () surrounding the anchor bolt (), the objective is to avoid an axial movement of the expansion sleeve (), especially in the case of a drilled hole diameter in the lower tolerance range or in the case of a hollow space. The expansion plug () has at least one eccentric geometry, so that an expansion of the expansion sleeve () can be achieved by a rotational movement of the anchor bolt (), especially around the longitudinal axis () as the axis of rotation ().

Expansion plug

One or more embodiments of the present invention relate to a torque-limited attachment device, having a first head piece with at least one shaped element for the purpose of establishing a positive-fit connection to an attachment tool, and having a second head piece which has at least one threading, wherein both head pieces are connected to each other, forming at least one predetermined breaking point which breaks at a limit torque between the two head pieces such that a first breakaway surface, the same being functionally assigned to the first head piece, and a second breakaway surface, the same being functionally assigned to the second head piece, are created, and wherein at least the second head piece has a base material inside, the same having a corrosion-resistant surface coating.

Torque-limited attachment device

A fastening element has a shaft (), and a tapping thread () carried by the shaft () and having at least one screw thread () a section () of which that adjoins the thread pilot (), having a plurality of following one another thread steps () having different cross-sections, with a cross-section of the at least one screw thread () decreasing stepwise toward the thread pilot () from a thread step () to a thread step (), with the thread steps () having respective cutting edge-forming end surfaces () aligned, at least partially, in a direction of the thread pilot ().

Growing community of inventors

Altendorf, Switzerland

Marc Schaeffer