Hilti Aktiengesellschaft

Hilti Aktiengessellschaft

Peter Gstach

Bernhard Winkler

Matteo Spampatti

Andrin Nigg

Patrick Scholz

Philipp Grosser

Daniele Casucci

Falk Rosenkranz

Michael Beckert

Jakob Kunz

Georg Oberndorfer

Peter Rickers

Michael Sproewitz

Robert Meier

Tobias Neumaier

Ronald Mihala

Berthold Aumueller

Pietro Bianchi

Berthold Aumüller

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.

Profile rail with reinforcing element

An end cap for a profile rail includes a connector for connecting the end cap to the profile rail and a fastening leg, where the fastening leg defines an opening and where a fastening pin is guidable through the opening to mount the profile rail. The opening has a cross-sectional constriction and the fastening pin is holdable in the opening by the cross-sectional constriction.

Profile rail end cap with nail holder

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.

Structure having edge reinforcement on profiled rail

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.

In the case of a thread-tapping screw (), especially a concrete screw (), including a screw head (), a screw shank () and a thread () that is formed on at least part of the screw shank (), whereby at least one longitudinal groove () is formed on a front section () of the screw (), starting at the end () of the screw on the screw shank (), and the at least one longitudinal groove () is delimited on the screw shank () by two lengthwise sides () running essentially radially relative to a longitudinal axis () of the screw (), it is the objective that the tightening torque needed when the screw () is being screwed into a drilled hole should be slight, and that the screw () should be produced cost-effectively. Each longitudinal groove (), at least one lengthwise side () is oriented at an angle &#x3b1; between 1&#xb0; and 20&#xb0; relative to a straight line running parallel to the longitudinal axis () of the screw (), and/or the at least one longitudinal groove () is configured on the screw shank () so as to be helical.

Thread-tapping concrete screw

A thread-tapping screw () has a thread () extending, starting from the screw shaft free end (), at least along a portion of the shaft length and a height of which constantly decreasing toward the free end () of the shaft (), and a plurality of cutting bodies () formed of a material having a greater hardness than hardness of the thread (), located in recesses () formed in the thread () and opening radially outwardly and having, respectively, a radial outer profile () projecting, at least partially, beyond the thread and a height (A, B, C, D, E) of which decreases toward the free end () of the shaft () stepwise.

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Schaan, Liechtenstein

Peter Gstach