Hilti Aktiengesellschaft

Bernhard Winkler

Peter Gstach

Daniele Casucci

Matteo Spampatti

Patrick Scholz

Roland Schneider

Manuel Gut

Philipp Grosser

Christoph Hakenholt

Bernhard Sander

Serhey Khandozhko

Andrin Nigg

Josef Glogger

Huu Toan Nguyen

Robert Spring

Falk Rosenkranz

Markus Heudorfer

Georg Oberndorfer

Jakob Kunz

Holger Basche

Michael Beckert

Peter Rickers

Michael Sproewitz

Denis Novokshanov

Robert Meier

Ronald Mihala

Lukas Pfarr

Tashari Ter Braack

Pietro Bianchi

A rail assembly is provided, suitable for embedding in concrete, including a profile rail having a rail body, wherein the rail body has a first lateral wall, a second lateral wall, a first rail lip protruding from the first lateral wall, and a second rail lip protruding from the second lateral wall. The rail assembly has a reinforcing element with a force-absorbing body, wherein the force-absorbing body is positioned in front of the first lateral wall of the profile rail for contacting the first lateral wall of the profile rail with the force-absorbing body. A construction body having a concrete element, in which a rail assembly of this type is embedded is also provided, as is a method.

Profile rail with reinforcing element

A profiled rail assembly for casting into concrete. The profiled rail assembly includes a profiled rail including a rail body having a rail slot extending in the direction of a longitudinal axis of the profiled rail, and a reinforcing body including a head element and at least one tension element protruding from the head element, the head element opposite the at least one tension element having a head element major face defining a contact surface for a formwork element. The at least one tension element is connected to the profiled rail.

Structure having edge reinforcement on profiled rail

An expansion anchor is provided, which is fixable in a borehole, including an expansion sleeve for anchoring on a wall of the borehole and including an anchor bolt which is guided through the expansion sleeve and which has an expansion area for expanding the expansion sleeve, the expansion sleeve having a first annular groove on its outside, which extends up to the front end face of the expansion sleeve facing the expansion area. According to the invention, it is provided that the expansion sleeve has a second annular groove on its outside, and that an annular connection piece is situated between the first annular groove and the second annual groove.

Expansion anchor

A rail assembly is provided, suitable for embedding in concrete, including a profile rail having a rail body, wherein the rail body has a first lateral wall, a second lateral wall, a first rail lip protruding from the first lateral wall, and a second rail lip protruding from the second lateral wall. The rail assembly has a reinforcing element with a force-absorbing body, wherein the force-absorbing body is positioned in front of the first lateral wall of the profile rail for contacting the first lateral wall of the profile rail with the force-absorbing body. A construction body having a concrete element, in which a rail assembly of this type is embedded is also provided.

A structure is provided, including a concrete body having a first surface and having a second surface arranged at an angle to the first surface; a profiled rail embedded in the concrete body, the profiled rail having a rail body having a rail slot extending in the direction of the longitudinal axis of the profiled rail, and the profiled rail emerging on the first surface of the concrete body; and a reinforcing body, which emerges on the second surface of the concrete body and which overlaps with the rail body, with regard to the direction of the longitudinal axis of the profiled rail, at least in some regions. A profiled rail assembly for such a structure is also provided.

A thread-forming screw has a shank which, in a front region of the shank, has a tip for insertion into a bore in a substrate, and in a rear region of the shank, has a drive for transmitting a torque to the shank. The shank has a spiral-shaped groove and a thread spiral which is inserted into the spiral-shaped groove. The spiral-shaped groove has a front flank and a rear flank disposed opposite the front flank. The front flank, at least regionally, has a different part flank angle than the rear flank.

Thread-forming screw with separate thread sprial and different part flank angles

An expansion anchor with a bolt and at least one expansion element is disclosed. An oblique surface is arranged in the region of the first end of the bolt and forces the expansion element radially outward on the bolt if the bolt is displaced in a pull-out direction relative to the expansion element. The bolt has, in the region of its rear end facing away from the first end, a load-absorber which is suitable for introducing tensile forces which are directed in the pull-out direction into the bolt. A plurality of grooves that are closed with respect to the first end of the bolt are disposed in the oblique surface and the plurality of grooves reduce a contact surface between the expansion element and the oblique surface. The contact surface between the expansion element and the oblique surface is reduced by the plurality of grooves by 20 to 50%.

Expansion anchor with grooves in the expansion cone

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.

Expansion anchor having a double coating

An expansion anchor is provided having a stud and at least one expansion sleeve that surrounds the stud, whereby, on the stud, there is an expansion cone that radially widens the expansion sleeve when the expansion cone is pulled into the expansion sleeve. It is provided that the expansion sleeve has a hardness of more than 350 HV in the area of its front end facing the expansion cone, whereby the hardness of the expansion sleeve decreases towards its rear end. A production method for such an expansion anchor is also provided.

Expansion anchor having a high-strength expansion sleeve in certain areas

An expansion anchor including a stud, at least one expansion element, and at least one slanted surface that is arranged on the stud and that pushes the expansion element radially outwards when the stud is moved in a pull-out direction relative to the expansion element is provided. It is provided that the coefficient of friction between the expansion element and the slanted surface is dependent on the direction.

Expansion anchor with an anisotropic coefficient of friction

An expansion anchor including a stud and at least one expansion element arranged on the stud, whereby the stud has a slanted surface that pushes the expansion element radially outwards when the stud is moved in a pull-out direction, relative to the expansion element is provided. It is provided that the expansion anchor has at least one swelling element consisting of a swellable compound that can swell in order to secure the expansion element onto the wall of a drilled hole in the pull-out direction.

Expansion anchor with a swelling element for securing the sleeve

An expansion anchor with a bolt and at least one expansion element is disclosed. An oblique surface is arranged in the region of the first end of the bolt and forces the expansion element radially outward on the bolt if the bolt is displaced in a pull-out direction relative to the expansion element. The bolt has, in the region of its rear end facing away from the first end, a load-absorber which is suitable for introducing tensile forces which are directed in the pull-out direction into the bolt. At least one groove which is closed with respect to the first end is made in the oblique surface, which groove reduces the contact surface between the expansion element and the oblique surface.

An anchor rod is disclosed. The anchor rod includes an attachment region and an anchoring region which is insertable into a borehole and which has a profiled section. The profiled section interacts with a curable organic and/or inorganic mortar compound filled into the borehole. The profiled section includes a plurality of expansion sections disposed axially in a row which are conically shaped. For each of the plurality of expansion sections, a diameter of the expansion section increases in a direction toward a free front end of the anchor rod, a ratio of a distance of the expansion section to a mean borehole diameter is 0.40 to 0.60, a ratio of an outer diameter to a core diameter of the expansion section is 1.35 to 1.55, and a cone angle of the expansion section is 22.5&#xb0; to 27.5&#xb0;.

Anchor rod

In an installation channel to be embedded into a curable construction material, e.g. concrete, having a support profile and preferably an attachment for attaching at least one add-on part to the installation channel, so that the outside of the support profile has a direct connection to the curable construction material at an embedding area, a potential fault block should be large so that large forces can be absorbed by the installation channel. A compressible insert is fastened to the outside of the support profile at the embedding area, so that part of the outside of the support profile is not in direct contact with the curable construction material at the embedding area.

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Feldkirch, Austria

Bernhard Winkler