Hilti Aktiengesellschaft

Wirtgen Gmbh

Hilit Aktiengesellschaft

Kay Heemann

Wolfgang Ludwig

Günter Hähn

Bernd Holl

Axel Mahlberg

Michael Bayerl

Uwe Bohn

Christoph Wiedner

Juergen Gebhard

Roland Gienau

Oliver Koehler

Vincent De Groof

Frederik Korte

Juergen Boeckle

Jürgen Gebhard

Jürgen Boeckle

A fastener includes an anchor bolt and a nut. The nut has a nut hole and an internal thread. The anchor bolt has an anchor portion and a threaded rod that has an external thread and that is connected to the anchor portion. The nut is arranged on the threaded rod and the internal thread of the nut threadedly engages the external thread of the threaded rod. The nut has a rearward nut section, a forward nut section, and an outside shoulder for load transfer into the nut which is located between the forward nut section and the rearward nut section and which faces the anchor portion of the anchor bolt. The internal thread of the nut extends at least in the forward nut section and threadedly engages the external thread of the threaded rod at least in the forward nut section.

Fastener and fastening arrangement including nut with load transfer shoulder

A drilling tool includes a hydraulically driven device () for advancing a drilling head () in a bore (), and a flow limiter () arranged in a hydraulic conduit () of the advancing device () for adjusting an advancing speed of the drilling head () in the bore (), with the flow limiter () having a pressure-actuated adjusting member () for adjusting flow of a hydraulic fluid in the hydraulic conduit means () in accordance with a flow volume of a rinsing fluid () for rinsing the bore.

Drilling tool and drilling method

An adaptor for setting a self-drilling, chemically anchorable, fastening element () includes a rotor member () rotatably supported in the adaptor housing () and having at its opposite ends () respectively, a coupling section () for connecting the rotor member () with a drilling tool () for joint rotation therewith, and a coupling receptacle () for fixedly receiving a free end () of the fastening element (). Support elements () are provided in one of two housing parts () for rotatably supporting the rotor member (). Sealing elements (), which are provided in another housing part (), for a connection channel section () that connects a connection opening () in the housing () for the ejection medium () with a feeding channel () in the rotor member ().

Adaptor for setting a self-drilling, chemically anchored, fastening element

An adapter member for connecting a self-drilling rock anchor () with a chuck () of a drilling tool, includes a sleeve-shaped section () having a bottom () provided at an end () of the sleeve-shaped section () for forming a receiving space () for connection with an end () of the rock anchor (), and a seal () arranged in a region of the bottom () and extending from the receiving space () to at least a plane (E; E; E; E) defined by the bottom.

Adapter member of a rock anchor

A road milling machine having a milling roller with a plurality of chisels. A signal receiving unit is assigned to a machine component which is directly or indirectly involved in the milling process or to another machine component. The signal receiving unit detects an operating condition of the machine component and is connected to a signal emitting unit. An optical detecting device may be assigned to the road milling machine, whereby operations are made easier and the milling pattern is optimized.

Road milling machine with optimized operation

A fastening element has a drilling head () provided at one end () of anchor tube () and having at least one inlet opening () that opens toward the receiving chamber () of the anchor tube (), and at least one through-opening () that opens outwardly for passing of the hardenable mass therethrough, and a mixing element () for the hardenable mass and which is located in the drilling head () between the at least one inlet opening () and the at least one through-opening ().

Fastening element

A separate drilling head has a distal end which contacts the material to be drilled, and a proximal end which is attached to a drive mechanism. The drive mechanism drives the separate drilling head into the material. The separate drilling head is forcelockingly secured in a thin-walled hollow anchor tube, and the separate drilling head includes a hard metal cutter element, and a substantially axially-oriented, axial stop shoulder at the proximal end that passes into a circumferentially closed, outer cone.

Growing community of inventors

Kaufering, Germany

Kay Heemann